3 * Global functions used everywhere
7 if ( !defined( 'MEDIAWIKI' ) ) {
8 die( "This file is part of MediaWiki, it is not a valid entry point" );
11 // Hide compatibility functions from Doxygen
15 * Compatibility functions
17 * We support PHP 5.2.3 and up.
18 * Re-implementations of newer functions or functions in non-standard
19 * PHP extensions may be included here.
22 if( !function_exists( 'iconv' ) ) {
23 /** @codeCoverageIgnore */
24 function iconv( $from, $to, $string ) {
25 return Fallback
::iconv( $from, $to, $string );
29 if ( !function_exists( 'mb_substr' ) ) {
30 /** @codeCoverageIgnore */
31 function mb_substr( $str, $start, $count='end' ) {
32 return Fallback
::mb_substr( $str, $start, $count );
35 /** @codeCoverageIgnore */
36 function mb_substr_split_unicode( $str, $splitPos ) {
37 return Fallback
::mb_substr_split_unicode( $str, $splitPos );
41 if ( !function_exists( 'mb_strlen' ) ) {
42 /** @codeCoverageIgnore */
43 function mb_strlen( $str, $enc = '' ) {
44 return Fallback
::mb_strlen( $str, $enc );
48 if( !function_exists( 'mb_strpos' ) ) {
49 /** @codeCoverageIgnore */
50 function mb_strpos( $haystack, $needle, $offset = 0, $encoding = '' ) {
51 return Fallback
::mb_strpos( $haystack, $needle, $offset, $encoding );
56 if( !function_exists( 'mb_strrpos' ) ) {
57 /** @codeCoverageIgnore */
58 function mb_strrpos( $haystack, $needle, $offset = 0, $encoding = '' ) {
59 return Fallback
::mb_strrpos( $haystack, $needle, $offset, $encoding );
64 // Support for Wietse Venema's taint feature
65 if ( !function_exists( 'istainted' ) ) {
66 /** @codeCoverageIgnore */
67 function istainted( $var ) {
70 /** @codeCoverageIgnore */
71 function taint( $var, $level = 0 ) {}
72 /** @codeCoverageIgnore */
73 function untaint( $var, $level = 0 ) {}
74 define( 'TC_HTML', 1 );
75 define( 'TC_SHELL', 1 );
76 define( 'TC_MYSQL', 1 );
77 define( 'TC_PCRE', 1 );
78 define( 'TC_SELF', 1 );
83 * Like array_diff( $a, $b ) except that it works with two-dimensional arrays.
85 function wfArrayDiff2( $a, $b ) {
86 return array_udiff( $a, $b, 'wfArrayDiff2_cmp' );
94 function wfArrayDiff2_cmp( $a, $b ) {
95 if ( !is_array( $a ) ) {
96 return strcmp( $a, $b );
97 } elseif ( count( $a ) !== count( $b ) ) {
98 return count( $a ) < count( $b ) ?
-1 : 1;
102 while( ( list( , $valueA ) = each( $a ) ) && ( list( , $valueB ) = each( $b ) ) ) {
103 $cmp = strcmp( $valueA, $valueB );
114 * Returns an array where the values in the first array are replaced by the
115 * values in the second array with the corresponding keys
121 function wfArrayLookup( $a, $b ) {
122 return array_flip( array_intersect( array_flip( $a ), array_keys( $b ) ) );
126 * Appends to second array if $value differs from that in $default
128 * @param $key String|Int
129 * @param $value Mixed
130 * @param $default Mixed
131 * @param $changed Array to alter
133 function wfAppendToArrayIfNotDefault( $key, $value, $default, &$changed ) {
134 if ( is_null( $changed ) ) {
135 throw new MWException( 'GlobalFunctions::wfAppendToArrayIfNotDefault got null' );
137 if ( $default[$key] !== $value ) {
138 $changed[$key] = $value;
143 * Backwards array plus for people who haven't bothered to read the PHP manual
144 * XXX: will not darn your socks for you.
146 * @param $array1 Array
147 * @param [$array2, [...]] Arrays
150 function wfArrayMerge( $array1/* ... */ ) {
151 $args = func_get_args();
152 $args = array_reverse( $args, true );
154 foreach ( $args as $arg ) {
161 * Merge arrays in the style of getUserPermissionsErrors, with duplicate removal
163 * wfMergeErrorArrays(
164 * array( array( 'x' ) ),
165 * array( array( 'x', '2' ) ),
166 * array( array( 'x' ) ),
167 * array( array( 'y' ) )
178 function wfMergeErrorArrays( /*...*/ ) {
179 $args = func_get_args();
181 foreach ( $args as $errors ) {
182 foreach ( $errors as $params ) {
183 # @todo FIXME: Sometimes get nested arrays for $params,
184 # which leads to E_NOTICEs
185 $spec = implode( "\t", $params );
186 $out[$spec] = $params;
189 return array_values( $out );
193 * Insert array into another array after the specified *KEY*
195 * @param $array Array: The array.
196 * @param $insert Array: The array to insert.
197 * @param $after Mixed: The key to insert after
200 function wfArrayInsertAfter( $array, $insert, $after ) {
201 // Find the offset of the element to insert after.
202 $keys = array_keys( $array );
203 $offsetByKey = array_flip( $keys );
205 $offset = $offsetByKey[$after];
207 // Insert at the specified offset
208 $before = array_slice( $array, 0, $offset +
1, true );
209 $after = array_slice( $array, $offset +
1, count( $array ) - $offset, true );
211 $output = $before +
$insert +
$after;
217 * Recursively converts the parameter (an object) to an array with the same data
219 * @param $objOrArray Object|Array
220 * @param $recursive Bool
223 function wfObjectToArray( $objOrArray, $recursive = true ) {
225 if( is_object( $objOrArray ) ) {
226 $objOrArray = get_object_vars( $objOrArray );
228 foreach ( $objOrArray as $key => $value ) {
229 if ( $recursive && ( is_object( $value ) ||
is_array( $value ) ) ) {
230 $value = wfObjectToArray( $value );
233 $array[$key] = $value;
240 * Wrapper around array_map() which also taints variables
242 * @param $function Callback
243 * @param $input Array
246 function wfArrayMap( $function, $input ) {
247 $ret = array_map( $function, $input );
248 foreach ( $ret as $key => $value ) {
249 $taint = istainted( $input[$key] );
251 taint( $ret[$key], $taint );
258 * Get a random decimal value between 0 and 1, in a way
259 * not likely to give duplicate values for any realistic
260 * number of articles.
264 function wfRandom() {
265 # The maximum random value is "only" 2^31-1, so get two random
266 # values to reduce the chance of dupes
267 $max = mt_getrandmax() +
1;
268 $rand = number_format( ( mt_rand() * $max +
mt_rand() )
269 / $max / $max, 12, '.', '' );
274 * We want some things to be included as literal characters in our title URLs
275 * for prettiness, which urlencode encodes by default. According to RFC 1738,
276 * all of the following should be safe:
280 * But + is not safe because it's used to indicate a space; &= are only safe in
281 * paths and not in queries (and we don't distinguish here); ' seems kind of
282 * scary; and urlencode() doesn't touch -_. to begin with. Plus, although /
283 * is reserved, we don't care. So the list we unescape is:
287 * However, IIS7 redirects fail when the url contains a colon (Bug 22709),
288 * so no fancy : for IIS7.
290 * %2F in the page titles seems to fatally break for some reason.
295 function wfUrlencode( $s ) {
297 if ( is_null( $s ) ) {
302 if ( is_null( $needle ) ) {
303 $needle = array( '%3B', '%40', '%24', '%21', '%2A', '%28', '%29', '%2C', '%2F' );
304 if ( !isset( $_SERVER['SERVER_SOFTWARE'] ) ||
( strpos( $_SERVER['SERVER_SOFTWARE'], 'Microsoft-IIS/7' ) === false ) ) {
309 $s = urlencode( $s );
312 array( ';', '@', '$', '!', '*', '(', ')', ',', '/', ':' ),
320 * This function takes two arrays as input, and returns a CGI-style string, e.g.
321 * "days=7&limit=100". Options in the first array override options in the second.
322 * Options set to "" will not be output.
324 * @param $array1 Array ( String|Array )
325 * @param $array2 Array ( String|Array )
326 * @param $prefix String
329 function wfArrayToCGI( $array1, $array2 = null, $prefix = '' ) {
330 if ( !is_null( $array2 ) ) {
331 $array1 = $array1 +
$array2;
335 foreach ( $array1 as $key => $value ) {
336 if ( $value !== '' ) {
340 if ( $prefix !== '' ) {
341 $key = $prefix . "[$key]";
343 if ( is_array( $value ) ) {
345 foreach ( $value as $k => $v ) {
346 $cgi .= $firstTime ?
'' : '&';
347 if ( is_array( $v ) ) {
348 $cgi .= wfArrayToCGI( $v, null, $key . "[$k]" );
350 $cgi .= urlencode( $key . "[$k]" ) . '=' . urlencode( $v );
355 if ( is_object( $value ) ) {
356 $value = $value->__toString();
358 $cgi .= urlencode( $key ) . '=' . urlencode( $value );
366 * This is the logical opposite of wfArrayToCGI(): it accepts a query string as
367 * its argument and returns the same string in array form. This allows compa-
368 * tibility with legacy functions that accept raw query strings instead of nice
369 * arrays. Of course, keys and values are urldecode()d. Don't try passing in-
370 * valid query strings, or it will explode.
372 * @param $query String: query string
373 * @return array Array version of input
375 function wfCgiToArray( $query ) {
376 if ( isset( $query[0] ) && $query[0] == '?' ) {
377 $query = substr( $query, 1 );
379 $bits = explode( '&', $query );
381 foreach ( $bits as $bit ) {
385 list( $key, $value ) = explode( '=', $bit );
386 $key = urldecode( $key );
387 $value = urldecode( $value );
388 if ( strpos( $key, '[' ) !== false ) {
389 $keys = array_reverse( explode( '[', $key ) );
390 $key = array_pop( $keys );
392 foreach ( $keys as $k ) {
393 $k = substr( $k, 0, -1 );
394 $temp = array( $k => $temp );
396 if ( isset( $ret[$key] ) ) {
397 $ret[$key] = array_merge( $ret[$key], $temp );
409 * Append a query string to an existing URL, which may or may not already
410 * have query string parameters already. If so, they will be combined.
413 * @param $query Mixed: string or associative array
416 function wfAppendQuery( $url, $query ) {
417 if ( is_array( $query ) ) {
418 $query = wfArrayToCGI( $query );
421 if( false === strpos( $url, '?' ) ) {
432 * Expand a potentially local URL to a fully-qualified URL. Assumes $wgServer
435 * The meaning of the PROTO_* constants is as follows:
436 * PROTO_HTTP: Output a URL starting with http://
437 * PROTO_HTTPS: Output a URL starting with https://
438 * PROTO_RELATIVE: Output a URL starting with // (protocol-relative URL)
439 * PROTO_CURRENT: Output a URL starting with either http:// or https:// , depending on which protocol was used for the current incoming request
440 * PROTO_CANONICAL: For URLs without a domain, like /w/index.php , use $wgCanonicalServer. For protocol-relative URLs, use the protocol of $wgCanonicalServer
441 * PROTO_INTERNAL: Like PROTO_CANONICAL, but uses $wgInternalServer instead of $wgCanonicalServer
443 * @todo this won't work with current-path-relative URLs
444 * like "subdir/foo.html", etc.
446 * @param $url String: either fully-qualified or a local path + query
447 * @param $defaultProto Mixed: one of the PROTO_* constants. Determines the
448 * protocol to use if $url or $wgServer is
450 * @return string Fully-qualified URL, current-path-relative URL or false if
451 * no valid URL can be constructed
453 function wfExpandUrl( $url, $defaultProto = PROTO_CURRENT
) {
454 global $wgServer, $wgCanonicalServer, $wgInternalServer;
455 $serverUrl = $wgServer;
456 if ( $defaultProto === PROTO_CANONICAL
) {
457 $serverUrl = $wgCanonicalServer;
459 // Make $wgInternalServer fall back to $wgServer if not set
460 if ( $defaultProto === PROTO_INTERNAL
&& $wgInternalServer !== false ) {
461 $serverUrl = $wgInternalServer;
463 if ( $defaultProto === PROTO_CURRENT
) {
464 $defaultProto = WebRequest
::detectProtocol() . '://';
467 // Analyze $serverUrl to obtain its protocol
468 $bits = wfParseUrl( $serverUrl );
469 $serverHasProto = $bits && $bits['scheme'] != '';
471 if ( $defaultProto === PROTO_CANONICAL ||
$defaultProto === PROTO_INTERNAL
) {
472 if ( $serverHasProto ) {
473 $defaultProto = $bits['scheme'] . '://';
475 // $wgCanonicalServer or $wgInternalServer doesn't have a protocol. This really isn't supposed to happen
476 // Fall back to HTTP in this ridiculous case
477 $defaultProto = PROTO_HTTP
;
481 $defaultProtoWithoutSlashes = substr( $defaultProto, 0, -2 );
483 if ( substr( $url, 0, 2 ) == '//' ) {
484 $url = $defaultProtoWithoutSlashes . $url;
485 } elseif ( substr( $url, 0, 1 ) == '/' ) {
486 // If $serverUrl is protocol-relative, prepend $defaultProtoWithoutSlashes, otherwise leave it alone
487 $url = ( $serverHasProto ?
'' : $defaultProtoWithoutSlashes ) . $serverUrl . $url;
490 $bits = wfParseUrl( $url );
491 if ( $bits && isset( $bits['path'] ) ) {
492 $bits['path'] = wfRemoveDotSegments( $bits['path'] );
493 return wfAssembleUrl( $bits );
497 } elseif ( substr( $url, 0, 1 ) != '/' ) {
498 # URL is a relative path
499 return wfRemoveDotSegments( $url );
502 # Expanded URL is not valid.
507 * This function will reassemble a URL parsed with wfParseURL. This is useful
508 * if you need to edit part of a URL and put it back together.
510 * This is the basic structure used (brackets contain keys for $urlParts):
511 * [scheme][delimiter][user]:[pass]@[host]:[port][path]?[query]#[fragment]
513 * @todo Need to integrate this into wfExpandUrl (bug 32168)
515 * @param $urlParts Array URL parts, as output from wfParseUrl
516 * @return string URL assembled from its component parts
518 function wfAssembleUrl( $urlParts ) {
521 if ( isset( $urlParts['delimiter'] ) ) {
522 if ( isset( $urlParts['scheme'] ) ) {
523 $result .= $urlParts['scheme'];
526 $result .= $urlParts['delimiter'];
529 if ( isset( $urlParts['host'] ) ) {
530 if ( isset( $urlParts['user'] ) ) {
531 $result .= $urlParts['user'];
532 if ( isset( $urlParts['pass'] ) ) {
533 $result .= ':' . $urlParts['pass'];
538 $result .= $urlParts['host'];
540 if ( isset( $urlParts['port'] ) ) {
541 $result .= ':' . $urlParts['port'];
545 if ( isset( $urlParts['path'] ) ) {
546 $result .= $urlParts['path'];
549 if ( isset( $urlParts['query'] ) ) {
550 $result .= '?' . $urlParts['query'];
553 if ( isset( $urlParts['fragment'] ) ) {
554 $result .= '#' . $urlParts['fragment'];
561 * Remove all dot-segments in the provided URL path. For example,
562 * '/a/./b/../c/' becomes '/a/c/'. For details on the algorithm, please see
563 * RFC3986 section 5.2.4.
565 * @todo Need to integrate this into wfExpandUrl (bug 32168)
567 * @param $urlPath String URL path, potentially containing dot-segments
568 * @return string URL path with all dot-segments removed
570 function wfRemoveDotSegments( $urlPath ) {
575 if ( preg_match('%^\.\.?/%', $urlPath, $matches) ) {
576 # Step A, remove leading "../" or "./"
577 $urlPath = substr( $urlPath, strlen( $matches[0] ) );
578 } elseif ( preg_match( '%^/\.(/|$)%', $urlPath, $matches ) ) {
579 # Step B, replace leading "/.$" or "/./" with "/"
580 $start = strlen( $matches[0] );
581 $urlPath = '/' . substr( $urlPath, $start );
582 } elseif ( preg_match( '%^/\.\.(/|$)%', $urlPath, $matches ) ) {
583 # Step C, replace leading "/..$" or "/../" with "/" and
584 # remove last path component in output
585 $start = strlen( $matches[0] );
586 $urlPath = '/' . substr( $urlPath, $start );
587 $output = preg_replace('%(^|/)[^/]*$%', '', $output);
588 } elseif ( preg_match( '%^\.\.?$%', $urlPath, $matches ) ) {
589 # Step D, remove "^..$" or "^.$"
592 # Step E, move leading path segment to output
593 preg_match( '%^/?[^/]*%', $urlPath, $matches );
594 $urlPath = substr( $urlPath, strlen( $matches[0] ) );
595 $output .= $matches[0];
603 * Returns a regular expression of url protocols
605 * @param $includeProtocolRelative bool If false, remove '//' from the returned protocol list.
606 * DO NOT USE this directly, use wfUrlProtocolsWithoutProtRel() instead
609 function wfUrlProtocols( $includeProtocolRelative = true ) {
610 global $wgUrlProtocols;
612 // Cache return values separately based on $includeProtocolRelative
613 static $withProtRel = null, $withoutProtRel = null;
614 $cachedValue = $includeProtocolRelative ?
$withProtRel : $withoutProtRel;
615 if ( !is_null( $cachedValue ) ) {
619 // Support old-style $wgUrlProtocols strings, for backwards compatibility
620 // with LocalSettings files from 1.5
621 if ( is_array( $wgUrlProtocols ) ) {
622 $protocols = array();
623 foreach ( $wgUrlProtocols as $protocol ) {
624 // Filter out '//' if !$includeProtocolRelative
625 if ( $includeProtocolRelative ||
$protocol !== '//' ) {
626 $protocols[] = preg_quote( $protocol, '/' );
630 $retval = implode( '|', $protocols );
632 // Ignore $includeProtocolRelative in this case
633 // This case exists for pre-1.6 compatibility, and we can safely assume
634 // that '//' won't appear in a pre-1.6 config because protocol-relative
635 // URLs weren't supported until 1.18
636 $retval = $wgUrlProtocols;
639 // Cache return value
640 if ( $includeProtocolRelative ) {
641 $withProtRel = $retval;
643 $withoutProtRel = $retval;
649 * Like wfUrlProtocols(), but excludes '//' from the protocol list. Use this if
650 * you need a regex that matches all URL protocols but does not match protocol-
654 function wfUrlProtocolsWithoutProtRel() {
655 return wfUrlProtocols( false );
659 * parse_url() work-alike, but non-broken. Differences:
661 * 1) Does not raise warnings on bad URLs (just returns false)
662 * 2) Handles protocols that don't use :// (e.g., mailto: and news: , as well as protocol-relative URLs) correctly
663 * 3) Adds a "delimiter" element to the array, either '://', ':' or '//' (see (2))
665 * @param $url String: a URL to parse
666 * @return Array: bits of the URL in an associative array, per PHP docs
668 function wfParseUrl( $url ) {
669 global $wgUrlProtocols; // Allow all protocols defined in DefaultSettings/LocalSettings.php
671 // Protocol-relative URLs are handled really badly by parse_url(). It's so bad that the easiest
672 // way to handle them is to just prepend 'http:' and strip the protocol out later
673 $wasRelative = substr( $url, 0, 2 ) == '//';
674 if ( $wasRelative ) {
677 wfSuppressWarnings();
678 $bits = parse_url( $url );
680 // parse_url() returns an array without scheme for some invalid URLs, e.g.
681 // parse_url("%0Ahttp://example.com") == array( 'host' => '%0Ahttp', 'path' => 'example.com' )
682 if ( !$bits ||
!isset( $bits['scheme'] ) ) {
686 // most of the protocols are followed by ://, but mailto: and sometimes news: not, check for it
687 if ( in_array( $bits['scheme'] . '://', $wgUrlProtocols ) ) {
688 $bits['delimiter'] = '://';
689 } elseif ( in_array( $bits['scheme'] . ':', $wgUrlProtocols ) ) {
690 $bits['delimiter'] = ':';
691 // parse_url detects for news: and mailto: the host part of an url as path
692 // We have to correct this wrong detection
693 if ( isset( $bits['path'] ) ) {
694 $bits['host'] = $bits['path'];
701 /* Provide an empty host for eg. file:/// urls (see bug 28627) */
702 if ( !isset( $bits['host'] ) ) {
705 /* parse_url loses the third / for file:///c:/ urls (but not on variants) */
706 if ( substr( $bits['path'], 0, 1 ) !== '/' ) {
707 $bits['path'] = '/' . $bits['path'];
711 // If the URL was protocol-relative, fix scheme and delimiter
712 if ( $wasRelative ) {
713 $bits['scheme'] = '';
714 $bits['delimiter'] = '//';
720 * Make URL indexes, appropriate for the el_index field of externallinks.
725 function wfMakeUrlIndexes( $url ) {
726 $bits = wfParseUrl( $url );
728 // Reverse the labels in the hostname, convert to lower case
729 // For emails reverse domainpart only
730 if ( $bits['scheme'] == 'mailto' ) {
731 $mailparts = explode( '@', $bits['host'], 2 );
732 if ( count( $mailparts ) === 2 ) {
733 $domainpart = strtolower( implode( '.', array_reverse( explode( '.', $mailparts[1] ) ) ) );
735 // No domain specified, don't mangle it
738 $reversedHost = $domainpart . '@' . $mailparts[0];
740 $reversedHost = strtolower( implode( '.', array_reverse( explode( '.', $bits['host'] ) ) ) );
742 // Add an extra dot to the end
743 // Why? Is it in wrong place in mailto links?
744 if ( substr( $reversedHost, -1, 1 ) !== '.' ) {
745 $reversedHost .= '.';
747 // Reconstruct the pseudo-URL
748 $prot = $bits['scheme'];
749 $index = $prot . $bits['delimiter'] . $reversedHost;
750 // Leave out user and password. Add the port, path, query and fragment
751 if ( isset( $bits['port'] ) ) {
752 $index .= ':' . $bits['port'];
754 if ( isset( $bits['path'] ) ) {
755 $index .= $bits['path'];
759 if ( isset( $bits['query'] ) ) {
760 $index .= '?' . $bits['query'];
762 if ( isset( $bits['fragment'] ) ) {
763 $index .= '#' . $bits['fragment'];
767 return array( "http:$index", "https:$index" );
769 return array( $index );
774 * Check whether a given URL has a domain that occurs in a given set of domains
775 * @param $url string URL
776 * @param $domains array Array of domains (strings)
777 * @return bool True if the host part of $url ends in one of the strings in $domains
779 function wfMatchesDomainList( $url, $domains ) {
780 $bits = wfParseUrl( $url );
781 if ( is_array( $bits ) && isset( $bits['host'] ) ) {
782 foreach ( (array)$domains as $domain ) {
783 // FIXME: This gives false positives. http://nds-nl.wikipedia.org will match nl.wikipedia.org
784 // We should use something that interprets dots instead
785 if ( substr( $bits['host'], -strlen( $domain ) ) === $domain ) {
794 * Sends a line to the debug log if enabled or, optionally, to a comment in output.
795 * In normal operation this is a NOP.
797 * Controlling globals:
798 * $wgDebugLogFile - points to the log file
799 * $wgProfileOnly - if set, normal debug messages will not be recorded.
800 * $wgDebugRawPage - if false, 'action=raw' hits will not result in debug output.
801 * $wgDebugComments - if on, some debug items may appear in comments in the HTML output.
803 * @param $text String
804 * @param $logonly Bool: set true to avoid appearing in HTML when $wgDebugComments is set
806 function wfDebug( $text, $logonly = false ) {
807 global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly, $wgDebugRawPage;
808 global $wgDebugLogPrefix, $wgShowDebug;
810 static $cache = array(); // Cache of unoutputted messages
811 $text = wfDebugTimer() . $text;
813 if ( !$wgDebugRawPage && wfIsDebugRawPage() ) {
817 if ( ( $wgDebugComments ||
$wgShowDebug ) && !$logonly ) {
820 if ( isset( $wgOut ) && is_object( $wgOut ) ) {
821 // add the message and any cached messages to the output
822 array_map( array( $wgOut, 'debug' ), $cache );
826 if ( wfRunHooks( 'Debug', array( $text, null /* no log group */ ) ) ) {
827 if ( $wgDebugLogFile != '' && !$wgProfileOnly ) {
828 # Strip unprintables; they can switch terminal modes when binary data
829 # gets dumped, which is pretty annoying.
830 $text = preg_replace( '![\x00-\x08\x0b\x0c\x0e-\x1a\x1c-\x1f]!', ' ', $text );
831 $text = $wgDebugLogPrefix . $text;
832 wfErrorLog( $text, $wgDebugLogFile );
838 * Returns true if debug logging should be suppressed if $wgDebugRawPage = false
840 function wfIsDebugRawPage() {
842 if ( $cache !== null ) {
845 # Check for raw action using $_GET not $wgRequest, since the latter might not be initialised yet
846 if ( ( isset( $_GET['action'] ) && $_GET['action'] == 'raw' )
848 isset( $_SERVER['SCRIPT_NAME'] )
849 && substr( $_SERVER['SCRIPT_NAME'], -8 ) == 'load.php'
860 * Get microsecond timestamps for debug logs
864 function wfDebugTimer() {
865 global $wgDebugTimestamps;
866 if ( !$wgDebugTimestamps ) {
869 static $start = null;
871 if ( $start === null ) {
872 $start = microtime( true );
873 $prefix = "\n$start";
875 $prefix = sprintf( "%6.4f", microtime( true ) - $start );
877 $mem = sprintf( "%5.1fM", ( memory_get_usage( true ) / (1024*1024) ) );
878 return "$prefix $mem " ;
882 * Send a line giving PHP memory usage.
884 * @param $exact Bool: print exact values instead of kilobytes (default: false)
886 function wfDebugMem( $exact = false ) {
887 $mem = memory_get_usage();
889 $mem = floor( $mem / 1024 ) . ' kilobytes';
893 wfDebug( "Memory usage: $mem\n" );
897 * Send a line to a supplementary debug log file, if configured, or main debug log if not.
898 * $wgDebugLogGroups[$logGroup] should be set to a filename to send to a separate log.
900 * @param $logGroup String
901 * @param $text String
902 * @param $public Bool: whether to log the event in the public log if no private
903 * log file is specified, (default true)
905 function wfDebugLog( $logGroup, $text, $public = true ) {
906 global $wgDebugLogGroups, $wgShowHostnames;
907 $text = trim( $text ) . "\n";
908 if( isset( $wgDebugLogGroups[$logGroup] ) ) {
909 $time = wfTimestamp( TS_DB
);
911 if ( $wgShowHostnames ) {
912 $host = wfHostname();
916 if ( wfRunHooks( 'Debug', array( $text, $logGroup ) ) ) {
917 wfErrorLog( "$time $host $wiki: $text", $wgDebugLogGroups[$logGroup] );
919 } elseif ( $public === true ) {
920 wfDebug( $text, true );
925 * Log for database errors
927 * @param $text String: database error message.
929 function wfLogDBError( $text ) {
930 global $wgDBerrorLog, $wgDBname;
931 if ( $wgDBerrorLog ) {
932 $host = trim(`hostname`
);
933 $text = date( 'D M j G:i:s T Y' ) . "\t$host\t$wgDBname\t$text";
934 wfErrorLog( $text, $wgDBerrorLog );
939 * Log to a file without getting "file size exceeded" signals.
941 * Can also log to TCP or UDP with the syntax udp://host:port/prefix. This will
942 * send lines to the specified port, prefixed by the specified prefix and a space.
944 * @param $text String
945 * @param $file String filename
947 function wfErrorLog( $text, $file ) {
948 if ( substr( $file, 0, 4 ) == 'udp:' ) {
949 # Needs the sockets extension
950 if ( preg_match( '!^(tcp|udp):(?://)?\[([0-9a-fA-F:]+)\]:(\d+)(?:/(.*))?$!', $file, $m ) ) {
951 // IPv6 bracketed host
953 $port = intval( $m[3] );
954 $prefix = isset( $m[4] ) ?
$m[4] : false;
956 } elseif ( preg_match( '!^(tcp|udp):(?://)?([a-zA-Z0-9.-]+):(\d+)(?:/(.*))?$!', $file, $m ) ) {
958 if ( !IP
::isIPv4( $host ) ) {
959 $host = gethostbyname( $host );
961 $port = intval( $m[3] );
962 $prefix = isset( $m[4] ) ?
$m[4] : false;
965 throw new MWException( __METHOD__
. ': Invalid UDP specification' );
968 // Clean it up for the multiplexer
969 if ( strval( $prefix ) !== '' ) {
970 $text = preg_replace( '/^/m', $prefix . ' ', $text );
973 if ( strlen( $text ) > 65506 ) {
974 $text = substr( $text, 0, 65506 );
977 if ( substr( $text, -1 ) != "\n" ) {
980 } elseif ( strlen( $text ) > 65507 ) {
981 $text = substr( $text, 0, 65507 );
984 $sock = socket_create( $domain, SOCK_DGRAM
, SOL_UDP
);
989 socket_sendto( $sock, $text, strlen( $text ), 0, $host, $port );
990 socket_close( $sock );
992 wfSuppressWarnings();
993 $exists = file_exists( $file );
994 $size = $exists ?
filesize( $file ) : false;
995 if ( !$exists ||
( $size !== false && $size +
strlen( $text ) < 0x7fffffff ) ) {
996 file_put_contents( $file, $text, FILE_APPEND
);
1005 function wfLogProfilingData() {
1006 global $wgRequestTime, $wgDebugLogFile, $wgDebugRawPage, $wgRequest;
1007 global $wgProfileLimit, $wgUser;
1009 $profiler = Profiler
::instance();
1011 # Profiling must actually be enabled...
1012 if ( $profiler->isStub() ) {
1016 // Get total page request time and only show pages that longer than
1017 // $wgProfileLimit time (default is 0)
1019 $elapsed = $now - $wgRequestTime;
1020 if ( $elapsed <= $wgProfileLimit ) {
1024 $profiler->logData();
1026 // Check whether this should be logged in the debug file.
1027 if ( $wgDebugLogFile == '' ||
( !$wgDebugRawPage && wfIsDebugRawPage() ) ) {
1032 if ( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
1033 $forward = ' forwarded for ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
1035 if ( !empty( $_SERVER['HTTP_CLIENT_IP'] ) ) {
1036 $forward .= ' client IP ' . $_SERVER['HTTP_CLIENT_IP'];
1038 if ( !empty( $_SERVER['HTTP_FROM'] ) ) {
1039 $forward .= ' from ' . $_SERVER['HTTP_FROM'];
1042 $forward = "\t(proxied via {$_SERVER['REMOTE_ADDR']}{$forward})";
1044 // Don't load $wgUser at this late stage just for statistics purposes
1045 // @todo FIXME: We can detect some anons even if it is not loaded. See User::getId()
1046 if ( $wgUser->isItemLoaded( 'id' ) && $wgUser->isAnon() ) {
1047 $forward .= ' anon';
1049 $log = sprintf( "%s\t%04.3f\t%s\n",
1050 gmdate( 'YmdHis' ), $elapsed,
1051 urldecode( $wgRequest->getRequestURL() . $forward ) );
1053 wfErrorLog( $log . $profiler->getOutput(), $wgDebugLogFile );
1057 * Check if the wiki read-only lock file is present. This can be used to lock
1058 * off editing functions, but doesn't guarantee that the database will not be
1063 function wfReadOnly() {
1064 global $wgReadOnlyFile, $wgReadOnly;
1066 if ( !is_null( $wgReadOnly ) ) {
1067 return (bool)$wgReadOnly;
1069 if ( $wgReadOnlyFile == '' ) {
1072 // Set $wgReadOnly for faster access next time
1073 if ( is_file( $wgReadOnlyFile ) ) {
1074 $wgReadOnly = file_get_contents( $wgReadOnlyFile );
1076 $wgReadOnly = false;
1078 return (bool)$wgReadOnly;
1084 function wfReadOnlyReason() {
1091 * Return a Language object from $langcode
1093 * @param $langcode Mixed: either:
1094 * - a Language object
1095 * - code of the language to get the message for, if it is
1096 * a valid code create a language for that language, if
1097 * it is a string but not a valid code then make a basic
1099 * - a boolean: if it's false then use the global object for
1100 * the current user's language (as a fallback for the old parameter
1101 * functionality), or if it is true then use global object
1102 * for the wiki's content language.
1103 * @return Language object
1105 function wfGetLangObj( $langcode = false ) {
1106 # Identify which language to get or create a language object for.
1107 # Using is_object here due to Stub objects.
1108 if( is_object( $langcode ) ) {
1109 # Great, we already have the object (hopefully)!
1113 global $wgContLang, $wgLanguageCode;
1114 if( $langcode === true ||
$langcode === $wgLanguageCode ) {
1115 # $langcode is the language code of the wikis content language object.
1116 # or it is a boolean and value is true
1121 if( $langcode === false ||
$langcode === $wgLang->getCode() ) {
1122 # $langcode is the language code of user language object.
1123 # or it was a boolean and value is false
1127 $validCodes = array_keys( Language
::getLanguageNames() );
1128 if( in_array( $langcode, $validCodes ) ) {
1129 # $langcode corresponds to a valid language.
1130 return Language
::factory( $langcode );
1133 # $langcode is a string, but not a valid language code; use content language.
1134 wfDebug( "Invalid language code passed to wfGetLangObj, falling back to content language.\n" );
1139 * Old function when $wgBetterDirectionality existed
1140 * Removed in core, kept in extensions for backwards compat.
1142 * @deprecated since 1.18
1145 function wfUILang() {
1151 * This is the new function for getting translated interface messages.
1152 * See the Message class for documentation how to use them.
1153 * The intention is that this function replaces all old wfMsg* functions.
1154 * @param $key \string Message key.
1155 * Varargs: normal message parameters.
1159 function wfMessage( $key /*...*/) {
1160 $params = func_get_args();
1161 array_shift( $params );
1162 if ( isset( $params[0] ) && is_array( $params[0] ) ) {
1163 $params = $params[0];
1165 return new Message( $key, $params );
1169 * This function accepts multiple message keys and returns a message instance
1170 * for the first message which is non-empty. If all messages are empty then an
1171 * instance of the first message key is returned.
1172 * @param varargs: message keys
1176 function wfMessageFallback( /*...*/ ) {
1177 $args = func_get_args();
1178 return MWFunction
::callArray( 'Message::newFallbackSequence', $args );
1182 * Get a message from anywhere, for the current user language.
1184 * Use wfMsgForContent() instead if the message should NOT
1185 * change depending on the user preferences.
1187 * @param $key String: lookup key for the message, usually
1188 * defined in languages/Language.php
1190 * Parameters to the message, which can be used to insert variable text into
1191 * it, can be passed to this function in the following formats:
1192 * - One per argument, starting at the second parameter
1193 * - As an array in the second parameter
1194 * These are not shown in the function definition.
1198 function wfMsg( $key ) {
1199 $args = func_get_args();
1200 array_shift( $args );
1201 return wfMsgReal( $key, $args );
1205 * Same as above except doesn't transform the message
1207 * @param $key String
1210 function wfMsgNoTrans( $key ) {
1211 $args = func_get_args();
1212 array_shift( $args );
1213 return wfMsgReal( $key, $args, true, false, false );
1217 * Get a message from anywhere, for the current global language
1218 * set with $wgLanguageCode.
1220 * Use this if the message should NOT change dependent on the
1221 * language set in the user's preferences. This is the case for
1222 * most text written into logs, as well as link targets (such as
1223 * the name of the copyright policy page). Link titles, on the
1224 * other hand, should be shown in the UI language.
1226 * Note that MediaWiki allows users to change the user interface
1227 * language in their preferences, but a single installation
1228 * typically only contains content in one language.
1230 * Be wary of this distinction: If you use wfMsg() where you should
1231 * use wfMsgForContent(), a user of the software may have to
1232 * customize potentially hundreds of messages in
1233 * order to, e.g., fix a link in every possible language.
1235 * @param $key String: lookup key for the message, usually
1236 * defined in languages/Language.php
1239 function wfMsgForContent( $key ) {
1240 global $wgForceUIMsgAsContentMsg;
1241 $args = func_get_args();
1242 array_shift( $args );
1244 if( is_array( $wgForceUIMsgAsContentMsg ) &&
1245 in_array( $key, $wgForceUIMsgAsContentMsg ) )
1247 $forcontent = false;
1249 return wfMsgReal( $key, $args, true, $forcontent );
1253 * Same as above except doesn't transform the message
1255 * @param $key String
1258 function wfMsgForContentNoTrans( $key ) {
1259 global $wgForceUIMsgAsContentMsg;
1260 $args = func_get_args();
1261 array_shift( $args );
1263 if( is_array( $wgForceUIMsgAsContentMsg ) &&
1264 in_array( $key, $wgForceUIMsgAsContentMsg ) )
1266 $forcontent = false;
1268 return wfMsgReal( $key, $args, true, $forcontent, false );
1272 * Really get a message
1274 * @param $key String: key to get.
1276 * @param $useDB Boolean
1277 * @param $forContent Mixed: Language code, or false for user lang, true for content lang.
1278 * @param $transform Boolean: Whether or not to transform the message.
1279 * @return String: the requested message.
1281 function wfMsgReal( $key, $args, $useDB = true, $forContent = false, $transform = true ) {
1282 wfProfileIn( __METHOD__
);
1283 $message = wfMsgGetKey( $key, $useDB, $forContent, $transform );
1284 $message = wfMsgReplaceArgs( $message, $args );
1285 wfProfileOut( __METHOD__
);
1290 * Fetch a message string value, but don't replace any keys yet.
1292 * @param $key String
1293 * @param $useDB Bool
1294 * @param $langCode String: Code of the language to get the message for, or
1295 * behaves as a content language switch if it is a boolean.
1296 * @param $transform Boolean: whether to parse magic words, etc.
1299 function wfMsgGetKey( $key, $useDB = true, $langCode = false, $transform = true ) {
1300 wfRunHooks( 'NormalizeMessageKey', array( &$key, &$useDB, &$langCode, &$transform ) );
1302 $cache = MessageCache
::singleton();
1303 $message = $cache->get( $key, $useDB, $langCode );
1304 if( $message === false ) {
1305 $message = '<' . htmlspecialchars( $key ) . '>';
1306 } elseif ( $transform ) {
1307 $message = $cache->transform( $message );
1313 * Replace message parameter keys on the given formatted output.
1315 * @param $message String
1316 * @param $args Array
1320 function wfMsgReplaceArgs( $message, $args ) {
1321 # Fix windows line-endings
1322 # Some messages are split with explode("\n", $msg)
1323 $message = str_replace( "\r", '', $message );
1325 // Replace arguments
1326 if ( count( $args ) ) {
1327 if ( is_array( $args[0] ) ) {
1328 $args = array_values( $args[0] );
1330 $replacementKeys = array();
1331 foreach( $args as $n => $param ) {
1332 $replacementKeys['$' . ( $n +
1 )] = $param;
1334 $message = strtr( $message, $replacementKeys );
1341 * Return an HTML-escaped version of a message.
1342 * Parameter replacements, if any, are done *after* the HTML-escaping,
1343 * so parameters may contain HTML (eg links or form controls). Be sure
1344 * to pre-escape them if you really do want plaintext, or just wrap
1345 * the whole thing in htmlspecialchars().
1347 * @param $key String
1348 * @param string ... parameters
1351 function wfMsgHtml( $key ) {
1352 $args = func_get_args();
1353 array_shift( $args );
1354 return wfMsgReplaceArgs( htmlspecialchars( wfMsgGetKey( $key ) ), $args );
1358 * Return an HTML version of message
1359 * Parameter replacements, if any, are done *after* parsing the wiki-text message,
1360 * so parameters may contain HTML (eg links or form controls). Be sure
1361 * to pre-escape them if you really do want plaintext, or just wrap
1362 * the whole thing in htmlspecialchars().
1364 * @param $key String
1365 * @param string ... parameters
1368 function wfMsgWikiHtml( $key ) {
1369 $args = func_get_args();
1370 array_shift( $args );
1371 return wfMsgReplaceArgs(
1372 MessageCache
::singleton()->parse( wfMsgGetKey( $key ), null,
1373 /* can't be set to false */ true, /* interface */ true )->getText(),
1378 * Returns message in the requested format
1379 * @param $key String: key of the message
1380 * @param $options Array: processing rules. Can take the following options:
1381 * <i>parse</i>: parses wikitext to HTML
1382 * <i>parseinline</i>: parses wikitext to HTML and removes the surrounding
1383 * p's added by parser or tidy
1384 * <i>escape</i>: filters message through htmlspecialchars
1385 * <i>escapenoentities</i>: same, but allows entity references like   through
1386 * <i>replaceafter</i>: parameters are substituted after parsing or escaping
1387 * <i>parsemag</i>: transform the message using magic phrases
1388 * <i>content</i>: fetch message for content language instead of interface
1389 * Also can accept a single associative argument, of the form 'language' => 'xx':
1390 * <i>language</i>: Language object or language code to fetch message for
1391 * (overriden by <i>content</i>).
1392 * Behavior for conflicting options (e.g., parse+parseinline) is undefined.
1396 function wfMsgExt( $key, $options ) {
1397 $args = func_get_args();
1398 array_shift( $args );
1399 array_shift( $args );
1400 $options = (array)$options;
1402 foreach( $options as $arrayKey => $option ) {
1403 if( !preg_match( '/^[0-9]+|language$/', $arrayKey ) ) {
1404 # An unknown index, neither numeric nor "language"
1405 wfWarn( "wfMsgExt called with incorrect parameter key $arrayKey", 1, E_USER_WARNING
);
1406 } elseif( preg_match( '/^[0-9]+$/', $arrayKey ) && !in_array( $option,
1407 array( 'parse', 'parseinline', 'escape', 'escapenoentities',
1408 'replaceafter', 'parsemag', 'content' ) ) ) {
1409 # A numeric index with unknown value
1410 wfWarn( "wfMsgExt called with incorrect parameter $option", 1, E_USER_WARNING
);
1414 if( in_array( 'content', $options, true ) ) {
1417 $langCodeObj = null;
1418 } elseif( array_key_exists( 'language', $options ) ) {
1419 $forContent = false;
1420 $langCode = wfGetLangObj( $options['language'] );
1421 $langCodeObj = $langCode;
1423 $forContent = false;
1425 $langCodeObj = null;
1428 $string = wfMsgGetKey( $key, /*DB*/true, $langCode, /*Transform*/false );
1430 if( !in_array( 'replaceafter', $options, true ) ) {
1431 $string = wfMsgReplaceArgs( $string, $args );
1434 $messageCache = MessageCache
::singleton();
1435 if( in_array( 'parse', $options, true ) ) {
1436 $string = $messageCache->parse( $string, null, true, !$forContent, $langCodeObj )->getText();
1437 } elseif ( in_array( 'parseinline', $options, true ) ) {
1438 $string = $messageCache->parse( $string, null, true, !$forContent, $langCodeObj )->getText();
1440 if( preg_match( '/^<p>(.*)\n?<\/p>\n?$/sU', $string, $m ) ) {
1443 } elseif ( in_array( 'parsemag', $options, true ) ) {
1444 $string = $messageCache->transform( $string,
1445 !$forContent, $langCodeObj );
1448 if ( in_array( 'escape', $options, true ) ) {
1449 $string = htmlspecialchars ( $string );
1450 } elseif ( in_array( 'escapenoentities', $options, true ) ) {
1451 $string = Sanitizer
::escapeHtmlAllowEntities( $string );
1454 if( in_array( 'replaceafter', $options, true ) ) {
1455 $string = wfMsgReplaceArgs( $string, $args );
1462 * Since wfMsg() and co suck, they don't return false if the message key they
1463 * looked up didn't exist but a XHTML string, this function checks for the
1464 * nonexistance of messages by checking the MessageCache::get() result directly.
1466 * @param $key String: the message key looked up
1467 * @return Boolean True if the message *doesn't* exist.
1469 function wfEmptyMsg( $key ) {
1470 return MessageCache
::singleton()->get( $key, /*useDB*/true, /*content*/false ) === false;
1474 * Throw a debugging exception. This function previously once exited the process,
1475 * but now throws an exception instead, with similar results.
1477 * @param $msg String: message shown when dying.
1479 function wfDebugDieBacktrace( $msg = '' ) {
1480 throw new MWException( $msg );
1484 * Fetch server name for use in error reporting etc.
1485 * Use real server name if available, so we know which machine
1486 * in a server farm generated the current page.
1490 function wfHostname() {
1492 if ( is_null( $host ) ) {
1493 if ( function_exists( 'posix_uname' ) ) {
1494 // This function not present on Windows
1495 $uname = posix_uname();
1499 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
1500 $host = $uname['nodename'];
1501 } elseif ( getenv( 'COMPUTERNAME' ) ) {
1502 # Windows computer name
1503 $host = getenv( 'COMPUTERNAME' );
1505 # This may be a virtual server.
1506 $host = $_SERVER['SERVER_NAME'];
1513 * Returns a HTML comment with the elapsed time since request.
1514 * This method has no side effects.
1518 function wfReportTime() {
1519 global $wgRequestTime, $wgShowHostnames;
1522 $elapsed = $now - $wgRequestTime;
1524 return $wgShowHostnames
1525 ?
sprintf( '<!-- Served by %s in %01.3f secs. -->', wfHostname(), $elapsed )
1526 : sprintf( '<!-- Served in %01.3f secs. -->', $elapsed );
1530 * Safety wrapper for debug_backtrace().
1532 * With Zend Optimizer 3.2.0 loaded, this causes segfaults under somewhat
1533 * murky circumstances, which may be triggered in part by stub objects
1534 * or other fancy talkin'.
1536 * Will return an empty array if Zend Optimizer is detected or if
1537 * debug_backtrace is disabled, otherwise the output from
1538 * debug_backtrace() (trimmed).
1540 * @param $limit int This parameter can be used to limit the number of stack frames returned
1542 * @return array of backtrace information
1544 function wfDebugBacktrace( $limit = 0 ) {
1545 static $disabled = null;
1547 if( extension_loaded( 'Zend Optimizer' ) ) {
1548 wfDebug( "Zend Optimizer detected; skipping debug_backtrace for safety.\n" );
1552 if ( is_null( $disabled ) ) {
1554 $functions = explode( ',', ini_get( 'disable_functions' ) );
1555 $functions = array_map( 'trim', $functions );
1556 $functions = array_map( 'strtolower', $functions );
1557 if ( in_array( 'debug_backtrace', $functions ) ) {
1558 wfDebug( "debug_backtrace is in disabled_functions\n" );
1566 if ( $limit && version_compare( PHP_VERSION
, '5.4.0', '>=' ) ) {
1567 return array_slice( debug_backtrace( DEBUG_BACKTRACE_PROVIDE_OBJECT
, $limit ), 1 );
1569 return array_slice( debug_backtrace(), 1 );
1574 * Get a debug backtrace as a string
1578 function wfBacktrace() {
1579 global $wgCommandLineMode;
1581 if ( $wgCommandLineMode ) {
1586 $backtrace = wfDebugBacktrace();
1587 foreach( $backtrace as $call ) {
1588 if( isset( $call['file'] ) ) {
1589 $f = explode( DIRECTORY_SEPARATOR
, $call['file'] );
1590 $file = $f[count( $f ) - 1];
1594 if( isset( $call['line'] ) ) {
1595 $line = $call['line'];
1599 if ( $wgCommandLineMode ) {
1600 $msg .= "$file line $line calls ";
1602 $msg .= '<li>' . $file . ' line ' . $line . ' calls ';
1604 if( !empty( $call['class'] ) ) {
1605 $msg .= $call['class'] . $call['type'];
1607 $msg .= $call['function'] . '()';
1609 if ( $wgCommandLineMode ) {
1615 if ( $wgCommandLineMode ) {
1625 * Get the name of the function which called this function
1628 * @return Bool|string
1630 function wfGetCaller( $level = 2 ) {
1631 $backtrace = wfDebugBacktrace( $level );
1632 if ( isset( $backtrace[$level] ) ) {
1633 return wfFormatStackFrame( $backtrace[$level] );
1635 $caller = 'unknown';
1641 * Return a string consisting of callers in the stack. Useful sometimes
1642 * for profiling specific points.
1644 * @param $limit The maximum depth of the stack frame to return, or false for
1648 function wfGetAllCallers( $limit = 3 ) {
1649 $trace = array_reverse( wfDebugBacktrace() );
1650 if ( !$limit ||
$limit > count( $trace ) - 1 ) {
1651 $limit = count( $trace ) - 1;
1653 $trace = array_slice( $trace, -$limit - 1, $limit );
1654 return implode( '/', array_map( 'wfFormatStackFrame', $trace ) );
1658 * Return a string representation of frame
1660 * @param $frame Array
1663 function wfFormatStackFrame( $frame ) {
1664 return isset( $frame['class'] ) ?
1665 $frame['class'] . '::' . $frame['function'] :
1670 /* Some generic result counters, pulled out of SearchEngine */
1676 * @param $offset Int
1680 function wfShowingResults( $offset, $limit ) {
1684 array( 'parseinline' ),
1685 $wgLang->formatNum( $limit ),
1686 $wgLang->formatNum( $offset +
1 )
1691 * Generate (prev x| next x) (20|50|100...) type links for paging
1693 * @param $offset String
1694 * @param $limit Integer
1695 * @param $link String
1696 * @param $query String: optional URL query parameter string
1697 * @param $atend Bool: optional param for specified if this is the last page
1699 * @deprecated in 1.19; use Language::viewPrevNext() instead
1701 function wfViewPrevNext( $offset, $limit, $link, $query = '', $atend = false ) {
1704 $query = wfCgiToArray( $query );
1706 if( is_object( $link ) ) {
1709 $title = Title
::newFromText( $link );
1710 if( is_null( $title ) ) {
1715 return $wgLang->viewPrevNext( $title, $offset, $limit, $query, $atend );
1719 * Make a list item, used by various special pages
1721 * @param $page String Page link
1722 * @param $details String Text between brackets
1723 * @param $oppositedm Boolean Add the direction mark opposite to your
1724 * language, to display text properly
1726 * @deprecated since 1.19; use Language::specialList() instead
1728 function wfSpecialList( $page, $details, $oppositedm = true ) {
1730 return $wgLang->specialList( $page, $details, $oppositedm );
1735 * @todo FIXME: We may want to blacklist some broken browsers
1737 * @param $force Bool
1738 * @return bool Whereas client accept gzip compression
1740 function wfClientAcceptsGzip( $force = false ) {
1741 static $result = null;
1742 if ( $result === null ||
$force ) {
1744 if( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) {
1745 # @todo FIXME: We may want to blacklist some broken browsers
1748 '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
1749 $_SERVER['HTTP_ACCEPT_ENCODING'],
1753 if( isset( $m[2] ) && ( $m[1] == 'q' ) && ( $m[2] == 0 ) ) {
1757 wfDebug( "wfClientAcceptsGzip: client accepts gzip.\n" );
1766 * Obtain the offset and limit values from the request string;
1767 * used in special pages
1769 * @param $deflimit Int default limit if none supplied
1770 * @param $optionname String Name of a user preference to check against
1774 function wfCheckLimits( $deflimit = 50, $optionname = 'rclimit' ) {
1776 return $wgRequest->getLimitOffset( $deflimit, $optionname );
1780 * Escapes the given text so that it may be output using addWikiText()
1781 * without any linking, formatting, etc. making its way through. This
1782 * is achieved by substituting certain characters with HTML entities.
1783 * As required by the callers, <nowiki> is not used.
1785 * @param $text String: text to be escaped
1788 function wfEscapeWikiText( $text ) {
1789 $text = strtr( "\n$text", array(
1790 '"' => '"', '&' => '&', "'" => ''', '<' => '<',
1791 '=' => '=', '>' => '>', '[' => '[', ']' => ']',
1792 '{' => '{', '|' => '|', '}' => '}',
1793 "\n#" => "\n#", "\n*" => "\n*",
1794 "\n:" => "\n:", "\n;" => "\n;",
1795 '://' => '://', 'ISBN ' => 'ISBN ', 'RFC ' => 'RFC ',
1797 return substr( $text, 1 );
1801 * Get the current unix timetstamp with microseconds. Useful for profiling
1805 return microtime( true );
1809 * Sets dest to source and returns the original value of dest
1810 * If source is NULL, it just returns the value, it doesn't set the variable
1811 * If force is true, it will set the value even if source is NULL
1813 * @param $dest Mixed
1814 * @param $source Mixed
1815 * @param $force Bool
1818 function wfSetVar( &$dest, $source, $force = false ) {
1820 if ( !is_null( $source ) ||
$force ) {
1827 * As for wfSetVar except setting a bit
1831 * @param $state Bool
1833 function wfSetBit( &$dest, $bit, $state = true ) {
1834 $temp = (bool)( $dest & $bit );
1835 if ( !is_null( $state ) ) {
1846 * A wrapper around the PHP function var_export().
1847 * Either print it or add it to the regular output ($wgOut).
1849 * @param $var A PHP variable to dump.
1851 function wfVarDump( $var ) {
1853 $s = str_replace( "\n", "<br />\n", var_export( $var, true ) . "\n" );
1854 if ( headers_sent() ||
!isset( $wgOut ) ||
!is_object( $wgOut ) ) {
1857 $wgOut->addHTML( $s );
1862 * Provide a simple HTTP error.
1864 * @param $code Int|String
1865 * @param $label String
1866 * @param $desc String
1868 function wfHttpError( $code, $label, $desc ) {
1871 header( "HTTP/1.0 $code $label" );
1872 header( "Status: $code $label" );
1873 $wgOut->sendCacheControl();
1875 header( 'Content-type: text/html; charset=utf-8' );
1876 print "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">".
1877 '<html><head><title>' .
1878 htmlspecialchars( $label ) .
1879 '</title></head><body><h1>' .
1880 htmlspecialchars( $label ) .
1882 nl2br( htmlspecialchars( $desc ) ) .
1883 "</p></body></html>\n";
1887 * Clear away any user-level output buffers, discarding contents.
1889 * Suitable for 'starting afresh', for instance when streaming
1890 * relatively large amounts of data without buffering, or wanting to
1891 * output image files without ob_gzhandler's compression.
1893 * The optional $resetGzipEncoding parameter controls suppression of
1894 * the Content-Encoding header sent by ob_gzhandler; by default it
1895 * is left. See comments for wfClearOutputBuffers() for why it would
1898 * Note that some PHP configuration options may add output buffer
1899 * layers which cannot be removed; these are left in place.
1901 * @param $resetGzipEncoding Bool
1903 function wfResetOutputBuffers( $resetGzipEncoding = true ) {
1904 if( $resetGzipEncoding ) {
1905 // Suppress Content-Encoding and Content-Length
1906 // headers from 1.10+s wfOutputHandler
1907 global $wgDisableOutputCompression;
1908 $wgDisableOutputCompression = true;
1910 while( $status = ob_get_status() ) {
1911 if( $status['type'] == 0 /* PHP_OUTPUT_HANDLER_INTERNAL */ ) {
1912 // Probably from zlib.output_compression or other
1913 // PHP-internal setting which can't be removed.
1915 // Give up, and hope the result doesn't break
1919 if( !ob_end_clean() ) {
1920 // Could not remove output buffer handler; abort now
1921 // to avoid getting in some kind of infinite loop.
1924 if( $resetGzipEncoding ) {
1925 if( $status['name'] == 'ob_gzhandler' ) {
1926 // Reset the 'Content-Encoding' field set by this handler
1927 // so we can start fresh.
1928 if ( function_exists( 'header_remove' ) ) {
1929 // Available since PHP 5.3.0
1930 header_remove( 'Content-Encoding' );
1932 // We need to provide a valid content-coding. See bug 28069
1933 header( 'Content-Encoding: identity' );
1942 * More legible than passing a 'false' parameter to wfResetOutputBuffers():
1944 * Clear away output buffers, but keep the Content-Encoding header
1945 * produced by ob_gzhandler, if any.
1947 * This should be used for HTTP 304 responses, where you need to
1948 * preserve the Content-Encoding header of the real result, but
1949 * also need to suppress the output of ob_gzhandler to keep to spec
1950 * and avoid breaking Firefox in rare cases where the headers and
1951 * body are broken over two packets.
1953 function wfClearOutputBuffers() {
1954 wfResetOutputBuffers( false );
1958 * Converts an Accept-* header into an array mapping string values to quality
1961 * @param $accept String
1962 * @param $def String default
1965 function wfAcceptToPrefs( $accept, $def = '*/*' ) {
1966 # No arg means accept anything (per HTTP spec)
1968 return array( $def => 1.0 );
1973 $parts = explode( ',', $accept );
1975 foreach( $parts as $part ) {
1976 # @todo FIXME: Doesn't deal with params like 'text/html; level=1'
1977 $values = explode( ';', trim( $part ) );
1979 if ( count( $values ) == 1 ) {
1980 $prefs[$values[0]] = 1.0;
1981 } elseif ( preg_match( '/q\s*=\s*(\d*\.\d+)/', $values[1], $match ) ) {
1982 $prefs[$values[0]] = floatval( $match[1] );
1990 * Checks if a given MIME type matches any of the keys in the given
1991 * array. Basic wildcards are accepted in the array keys.
1993 * Returns the matching MIME type (or wildcard) if a match, otherwise
1996 * @param $type String
1997 * @param $avail Array
2001 function mimeTypeMatch( $type, $avail ) {
2002 if( array_key_exists( $type, $avail ) ) {
2005 $parts = explode( '/', $type );
2006 if( array_key_exists( $parts[0] . '/*', $avail ) ) {
2007 return $parts[0] . '/*';
2008 } elseif( array_key_exists( '*/*', $avail ) ) {
2017 * Returns the 'best' match between a client's requested internet media types
2018 * and the server's list of available types. Each list should be an associative
2019 * array of type to preference (preference is a float between 0.0 and 1.0).
2020 * Wildcards in the types are acceptable.
2022 * @param $cprefs Array: client's acceptable type list
2023 * @param $sprefs Array: server's offered types
2026 * @todo FIXME: Doesn't handle params like 'text/plain; charset=UTF-8'
2027 * XXX: generalize to negotiate other stuff
2029 function wfNegotiateType( $cprefs, $sprefs ) {
2032 foreach( array_keys( $sprefs ) as $type ) {
2033 $parts = explode( '/', $type );
2034 if( $parts[1] != '*' ) {
2035 $ckey = mimeTypeMatch( $type, $cprefs );
2037 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
2042 foreach( array_keys( $cprefs ) as $type ) {
2043 $parts = explode( '/', $type );
2044 if( $parts[1] != '*' && !array_key_exists( $type, $sprefs ) ) {
2045 $skey = mimeTypeMatch( $type, $sprefs );
2047 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
2055 foreach( array_keys( $combine ) as $type ) {
2056 if( $combine[$type] > $bestq ) {
2058 $bestq = $combine[$type];
2066 * Reference-counted warning suppression
2070 function wfSuppressWarnings( $end = false ) {
2071 static $suppressCount = 0;
2072 static $originalLevel = false;
2075 if ( $suppressCount ) {
2077 if ( !$suppressCount ) {
2078 error_reporting( $originalLevel );
2082 if ( !$suppressCount ) {
2083 // E_DEPRECATED is undefined in PHP 5.2
2084 if( !defined( 'E_DEPRECATED' ) ) {
2085 define( 'E_DEPRECATED', 8192 );
2087 $originalLevel = error_reporting( E_ALL
& ~
( E_WARNING | E_NOTICE | E_USER_WARNING | E_USER_NOTICE | E_DEPRECATED
) );
2094 * Restore error level to previous value
2096 function wfRestoreWarnings() {
2097 wfSuppressWarnings( true );
2100 # Autodetect, convert and provide timestamps of various types
2103 * Unix time - the number of seconds since 1970-01-01 00:00:00 UTC
2105 define( 'TS_UNIX', 0 );
2108 * MediaWiki concatenated string timestamp (YYYYMMDDHHMMSS)
2110 define( 'TS_MW', 1 );
2113 * MySQL DATETIME (YYYY-MM-DD HH:MM:SS)
2115 define( 'TS_DB', 2 );
2118 * RFC 2822 format, for E-mail and HTTP headers
2120 define( 'TS_RFC2822', 3 );
2123 * ISO 8601 format with no timezone: 1986-02-09T20:00:00Z
2125 * This is used by Special:Export
2127 define( 'TS_ISO_8601', 4 );
2130 * An Exif timestamp (YYYY:MM:DD HH:MM:SS)
2132 * @see http://exif.org/Exif2-2.PDF The Exif 2.2 spec, see page 28 for the
2133 * DateTime tag and page 36 for the DateTimeOriginal and
2134 * DateTimeDigitized tags.
2136 define( 'TS_EXIF', 5 );
2139 * Oracle format time.
2141 define( 'TS_ORACLE', 6 );
2144 * Postgres format time.
2146 define( 'TS_POSTGRES', 7 );
2151 define( 'TS_DB2', 8 );
2154 * ISO 8601 basic format with no timezone: 19860209T200000Z. This is used by ResourceLoader
2156 define( 'TS_ISO_8601_BASIC', 9 );
2159 * Get a timestamp string in one of various formats
2161 * @param $outputtype Mixed: A timestamp in one of the supported formats, the
2162 * function will autodetect which format is supplied and act
2164 * @param $ts Mixed: the timestamp to convert or 0 for the current timestamp
2165 * @return Mixed: String / false The same date in the format specified in $outputtype or false
2167 function wfTimestamp( $outputtype = TS_UNIX
, $ts = 0 ) {
2172 if ( !$ts ) { // We want to catch 0, '', null... but not date strings starting with a letter.
2175 } elseif ( preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)$/D', $ts, $da ) ) {
2177 } elseif ( preg_match( '/^(\d{4}):(\d\d):(\d\d) (\d\d):(\d\d):(\d\d)$/D', $ts, $da ) ) {
2179 } elseif ( preg_match( '/^(\d{4})(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)$/D', $ts, $da ) ) {
2181 } elseif ( preg_match( '/^-?\d{1,13}$/D', $ts ) ) {
2184 $strtime = "@$ts"; // Undocumented?
2185 } elseif ( preg_match( '/^\d{2}-\d{2}-\d{4} \d{2}:\d{2}:\d{2}.\d{6}$/', $ts ) ) {
2186 # TS_ORACLE // session altered to DD-MM-YYYY HH24:MI:SS.FF6
2187 $strtime = preg_replace( '/(\d\d)\.(\d\d)\.(\d\d)(\.(\d+))?/', "$1:$2:$3",
2188 str_replace( '+00:00', 'UTC', $ts ) );
2189 } elseif ( preg_match( '/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(?:\.*\d*)?Z$/', $ts, $da ) ) {
2191 } elseif ( preg_match( '/^(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})(\d{2})(?:\.*\d*)?Z$/', $ts, $da ) ) {
2193 } elseif ( preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)\.*\d*[\+\- ](\d\d)$/', $ts, $da ) ) {
2195 } elseif ( preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)\.*\d* GMT$/', $ts, $da ) ) {
2197 } elseif (preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)\.\d\d\d$/', $ts, $da ) ) {
2199 } elseif ( preg_match( '/^[ \t\r\n]*([A-Z][a-z]{2},[ \t\r\n]*)?' . # Day of week
2200 '\d\d?[ \t\r\n]*[A-Z][a-z]{2}[ \t\r\n]*\d{2}(?:\d{2})?' . # dd Mon yyyy
2201 '[ \t\r\n]*\d\d[ \t\r\n]*:[ \t\r\n]*\d\d[ \t\r\n]*:[ \t\r\n]*\d\d/S', $ts ) ) { # hh:mm:ss
2202 # TS_RFC2822, accepting a trailing comment. See http://www.squid-cache.org/mail-archive/squid-users/200307/0122.html / r77171
2203 # The regex is a superset of rfc2822 for readability
2204 $strtime = strtok( $ts, ';' );
2205 } elseif ( preg_match( '/^[A-Z][a-z]{5,8}, \d\d-[A-Z][a-z]{2}-\d{2} \d\d:\d\d:\d\d/', $ts ) ) {
2208 } elseif ( preg_match( '/^[A-Z][a-z]{2} [A-Z][a-z]{2} +\d{1,2} \d\d:\d\d:\d\d \d{4}/', $ts ) ) {
2213 wfDebug("wfTimestamp() fed bogus time value: TYPE=$outputtype; VALUE=$ts\n");
2218 static $formats = array(
2221 TS_DB
=> 'Y-m-d H:i:s',
2222 TS_ISO_8601
=> 'Y-m-d\TH:i:s\Z',
2223 TS_ISO_8601_BASIC
=> 'Ymd\THis\Z',
2224 TS_EXIF
=> 'Y:m:d H:i:s', // This shouldn't ever be used, but is included for completeness
2225 TS_RFC2822
=> 'D, d M Y H:i:s',
2226 TS_ORACLE
=> 'd-m-Y H:i:s.000000', // Was 'd-M-y h.i.s A' . ' +00:00' before r51500
2227 TS_POSTGRES
=> 'Y-m-d H:i:s',
2228 TS_DB2
=> 'Y-m-d H:i:s',
2231 if ( !isset( $formats[$outputtype] ) ) {
2232 throw new MWException( 'wfTimestamp() called with illegal output type.' );
2235 if ( function_exists( "date_create" ) ) {
2236 if ( count( $da ) ) {
2237 $ds = sprintf("%04d-%02d-%02dT%02d:%02d:%02d.00+00:00",
2238 (int)$da[1], (int)$da[2], (int)$da[3],
2239 (int)$da[4], (int)$da[5], (int)$da[6]);
2241 $d = date_create( $ds, new DateTimeZone( 'GMT' ) );
2242 } elseif ( $strtime ) {
2243 $d = date_create( $strtime, new DateTimeZone( 'GMT' ) );
2249 wfDebug("wfTimestamp() fed bogus time value: $outputtype; $ts\n");
2253 $output = $d->format( $formats[$outputtype] );
2255 if ( count( $da ) ) {
2256 // Warning! gmmktime() acts oddly if the month or day is set to 0
2257 // We may want to handle that explicitly at some point
2258 $uts = gmmktime( (int)$da[4], (int)$da[5], (int)$da[6],
2259 (int)$da[2], (int)$da[3], (int)$da[1] );
2260 } elseif ( $strtime ) {
2261 $uts = strtotime( $strtime );
2264 if ( $uts === false ) {
2265 wfDebug("wfTimestamp() can't parse the timestamp (non 32-bit time? Update php): $outputtype; $ts\n");
2269 if ( TS_UNIX
== $outputtype ) {
2272 $output = gmdate( $formats[$outputtype], $uts );
2275 if ( ( $outputtype == TS_RFC2822
) ||
( $outputtype == TS_POSTGRES
) ) {
2283 * Return a formatted timestamp, or null if input is null.
2284 * For dealing with nullable timestamp columns in the database.
2286 * @param $outputtype Integer
2290 function wfTimestampOrNull( $outputtype = TS_UNIX
, $ts = null ) {
2291 if( is_null( $ts ) ) {
2294 return wfTimestamp( $outputtype, $ts );
2299 * Convenience function; returns MediaWiki timestamp for the present time.
2303 function wfTimestampNow() {
2305 return wfTimestamp( TS_MW
, time() );
2309 * Check if the operating system is Windows
2311 * @return Bool: true if it's Windows, False otherwise.
2313 function wfIsWindows() {
2314 static $isWindows = null;
2315 if ( $isWindows === null ) {
2316 $isWindows = substr( php_uname(), 0, 7 ) == 'Windows';
2322 * Check if we are running under HipHop
2326 function wfIsHipHop() {
2327 return function_exists( 'hphp_thread_set_warmup_enabled' );
2331 * Swap two variables
2336 function swap( &$x, &$y ) {
2343 * Tries to get the system directory for temporary files. The TMPDIR, TMP, and
2344 * TEMP environment variables are then checked in sequence, and if none are set
2345 * try sys_get_temp_dir() for PHP >= 5.2.1. All else fails, return /tmp for Unix
2346 * or C:\Windows\Temp for Windows and hope for the best.
2347 * It is common to call it with tempnam().
2349 * NOTE: When possible, use instead the tmpfile() function to create
2350 * temporary files to avoid race conditions on file creation, etc.
2354 function wfTempDir() {
2355 foreach( array( 'TMPDIR', 'TMP', 'TEMP' ) as $var ) {
2356 $tmp = getenv( $var );
2357 if( $tmp && file_exists( $tmp ) && is_dir( $tmp ) && is_writable( $tmp ) ) {
2361 if( function_exists( 'sys_get_temp_dir' ) ) {
2362 return sys_get_temp_dir();
2365 return wfIsWindows() ?
'C:\Windows\Temp' : '/tmp';
2369 * Make directory, and make all parent directories if they don't exist
2371 * @param $dir String: full path to directory to create
2372 * @param $mode Integer: chmod value to use, default is $wgDirectoryMode
2373 * @param $caller String: optional caller param for debugging.
2376 function wfMkdirParents( $dir, $mode = null, $caller = null ) {
2377 global $wgDirectoryMode;
2379 if ( !is_null( $caller ) ) {
2380 wfDebug( "$caller: called wfMkdirParents($dir)\n" );
2383 if( strval( $dir ) === '' ||
file_exists( $dir ) ) {
2387 $dir = str_replace( array( '\\', '/' ), DIRECTORY_SEPARATOR
, $dir );
2389 if ( is_null( $mode ) ) {
2390 $mode = $wgDirectoryMode;
2393 // Turn off the normal warning, we're doing our own below
2394 wfSuppressWarnings();
2395 $ok = mkdir( $dir, $mode, true ); // PHP5 <3
2396 wfRestoreWarnings();
2399 // PHP doesn't report the path in its warning message, so add our own to aid in diagnosis.
2400 trigger_error( __FUNCTION__
. ": failed to mkdir \"$dir\" mode $mode", E_USER_WARNING
);
2406 * Increment a statistics counter
2408 * @param $key String
2411 function wfIncrStats( $key, $count = 1 ) {
2412 global $wgStatsMethod;
2414 $count = intval( $count );
2416 if( $wgStatsMethod == 'udp' ) {
2417 global $wgUDPProfilerHost, $wgUDPProfilerPort, $wgDBname, $wgAggregateStatsID;
2420 $id = $wgAggregateStatsID !== false ?
$wgAggregateStatsID : $wgDBname;
2423 $socket = socket_create( AF_INET
, SOCK_DGRAM
, SOL_UDP
);
2424 $statline = "stats/{$id} - {$count} 1 1 1 1 -total\n";
2428 strlen( $statline ),
2434 $statline = "stats/{$id} - {$count} 1 1 1 1 {$key}\n";
2435 wfSuppressWarnings();
2439 strlen( $statline ),
2444 wfRestoreWarnings();
2445 } elseif( $wgStatsMethod == 'cache' ) {
2447 $key = wfMemcKey( 'stats', $key );
2448 if ( is_null( $wgMemc->incr( $key, $count ) ) ) {
2449 $wgMemc->add( $key, $count );
2457 * @param $nr Mixed: the number to format
2458 * @param $acc Integer: the number of digits after the decimal point, default 2
2459 * @param $round Boolean: whether or not to round the value, default true
2462 function wfPercent( $nr, $acc = 2, $round = true ) {
2463 $ret = sprintf( "%.${acc}f", $nr );
2464 return $round ?
round( $ret, $acc ) . '%' : "$ret%";
2468 * Find out whether or not a mixed variable exists in a string
2470 * @param $needle String
2471 * @param $str String
2472 * @param $insensitive Boolean
2475 function in_string( $needle, $str, $insensitive = false ) {
2477 if( $insensitive ) $func = 'stripos';
2479 return $func( $str, $needle ) !== false;
2483 * Safety wrapper around ini_get() for boolean settings.
2484 * The values returned from ini_get() are pre-normalized for settings
2485 * set via php.ini or php_flag/php_admin_flag... but *not*
2486 * for those set via php_value/php_admin_value.
2488 * It's fairly common for people to use php_value instead of php_flag,
2489 * which can leave you with an 'off' setting giving a false positive
2490 * for code that just takes the ini_get() return value as a boolean.
2492 * To make things extra interesting, setting via php_value accepts
2493 * "true" and "yes" as true, but php.ini and php_flag consider them false. :)
2494 * Unrecognized values go false... again opposite PHP's own coercion
2495 * from string to bool.
2497 * Luckily, 'properly' set settings will always come back as '0' or '1',
2498 * so we only have to worry about them and the 'improper' settings.
2500 * I frickin' hate PHP... :P
2502 * @param $setting String
2505 function wfIniGetBool( $setting ) {
2506 $val = ini_get( $setting );
2507 // 'on' and 'true' can't have whitespace around them, but '1' can.
2508 return strtolower( $val ) == 'on'
2509 ||
strtolower( $val ) == 'true'
2510 ||
strtolower( $val ) == 'yes'
2511 ||
preg_match( "/^\s*[+-]?0*[1-9]/", $val ); // approx C atoi() function
2515 * Wrapper function for PHP's dl(). This doesn't work in most situations from
2516 * PHP 5.3 onward, and is usually disabled in shared environments anyway.
2518 * @param $extension String A PHP extension. The file suffix (.so or .dll)
2520 * @param $fileName String Name of the library, if not $extension.suffix
2521 * @return Bool - Whether or not the extension is loaded
2523 function wfDl( $extension, $fileName = null ) {
2524 if( extension_loaded( $extension ) ) {
2529 $sapi = php_sapi_name();
2530 if( version_compare( PHP_VERSION
, '5.3.0', '<' ) ||
2531 $sapi == 'cli' ||
$sapi == 'cgi' ||
$sapi == 'embed' )
2533 $canDl = ( function_exists( 'dl' ) && is_callable( 'dl' )
2534 && wfIniGetBool( 'enable_dl' ) && !wfIniGetBool( 'safe_mode' ) );
2538 $fileName = $fileName ?
$fileName : $extension;
2539 if( wfIsWindows() ) {
2540 $fileName = 'php_' . $fileName;
2542 wfSuppressWarnings();
2543 dl( $fileName . '.' . PHP_SHLIB_SUFFIX
);
2544 wfRestoreWarnings();
2546 return extension_loaded( $extension );
2550 * Windows-compatible version of escapeshellarg()
2551 * Windows doesn't recognise single-quotes in the shell, but the escapeshellarg()
2552 * function puts single quotes in regardless of OS.
2554 * Also fixes the locale problems on Linux in PHP 5.2.6+ (bug backported to
2555 * earlier distro releases of PHP)
2560 function wfEscapeShellArg( ) {
2561 wfInitShellLocale();
2563 $args = func_get_args();
2566 foreach ( $args as $arg ) {
2573 if ( wfIsWindows() ) {
2574 // Escaping for an MSVC-style command line parser and CMD.EXE
2576 // * http://web.archive.org/web/20020708081031/http://mailman.lyra.org/pipermail/scite-interest/2002-March/000436.html
2577 // * http://technet.microsoft.com/en-us/library/cc723564.aspx
2580 // Double the backslashes before any double quotes. Escape the double quotes.
2581 $tokens = preg_split( '/(\\\\*")/', $arg, -1, PREG_SPLIT_DELIM_CAPTURE
);
2584 foreach ( $tokens as $token ) {
2585 if ( $iteration %
2 == 1 ) {
2586 // Delimiter, a double quote preceded by zero or more slashes
2587 $arg .= str_replace( '\\', '\\\\', substr( $token, 0, -1 ) ) . '\\"';
2588 } elseif ( $iteration %
4 == 2 ) {
2589 // ^ in $token will be outside quotes, need to be escaped
2590 $arg .= str_replace( '^', '^^', $token );
2591 } else { // $iteration % 4 == 0
2592 // ^ in $token will appear inside double quotes, so leave as is
2597 // Double the backslashes before the end of the string, because
2598 // we will soon add a quote
2600 if ( preg_match( '/^(.*?)(\\\\+)$/', $arg, $m ) ) {
2601 $arg = $m[1] . str_replace( '\\', '\\\\', $m[2] );
2604 // Add surrounding quotes
2605 $retVal .= '"' . $arg . '"';
2607 $retVal .= escapeshellarg( $arg );
2614 * Execute a shell command, with time and memory limits mirrored from the PHP
2615 * configuration if supported.
2616 * @param $cmd String Command line, properly escaped for shell.
2617 * @param &$retval optional, will receive the program's exit code.
2618 * (non-zero is usually failure)
2619 * @param $environ Array optional environment variables which should be
2620 * added to the executed command environment.
2621 * @return collected stdout as a string (trailing newlines stripped)
2623 function wfShellExec( $cmd, &$retval = null, $environ = array() ) {
2624 global $IP, $wgMaxShellMemory, $wgMaxShellFileSize, $wgMaxShellTime;
2627 if ( is_null( $disabled ) ) {
2629 if( wfIniGetBool( 'safe_mode' ) ) {
2630 wfDebug( "wfShellExec can't run in safe_mode, PHP's exec functions are too broken.\n" );
2631 $disabled = 'safemode';
2633 $functions = explode( ',', ini_get( 'disable_functions' ) );
2634 $functions = array_map( 'trim', $functions );
2635 $functions = array_map( 'strtolower', $functions );
2636 if ( in_array( 'passthru', $functions ) ) {
2637 wfDebug( "passthru is in disabled_functions\n" );
2638 $disabled = 'passthru';
2644 return $disabled == 'safemode' ?
2645 'Unable to run external programs in safe mode.' :
2646 'Unable to run external programs, passthru() is disabled.';
2649 wfInitShellLocale();
2652 foreach( $environ as $k => $v ) {
2653 if ( wfIsWindows() ) {
2654 /* Surrounding a set in quotes (method used by wfEscapeShellArg) makes the quotes themselves
2655 * appear in the environment variable, so we must use carat escaping as documented in
2656 * http://technet.microsoft.com/en-us/library/cc723564.aspx
2657 * Note however that the quote isn't listed there, but is needed, and the parentheses
2658 * are listed there but doesn't appear to need it.
2660 $envcmd .= "set $k=" . preg_replace( '/([&|()<>^"])/', '^\\1', $v ) . '&& ';
2662 /* Assume this is a POSIX shell, thus required to accept variable assignments before the command
2663 * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_09_01
2665 $envcmd .= "$k=" . escapeshellarg( $v ) . ' ';
2668 $cmd = $envcmd . $cmd;
2670 if ( wfIsWindows() ) {
2671 if ( version_compare( PHP_VERSION
, '5.3.0', '<' ) && /* Fixed in 5.3.0 :) */
2672 ( version_compare( PHP_VERSION
, '5.2.1', '>=' ) ||
php_uname( 's' ) == 'Windows NT' ) )
2674 # Hack to work around PHP's flawed invocation of cmd.exe
2675 # http://news.php.net/php.internals/21796
2676 # Windows 9x doesn't accept any kind of quotes
2677 $cmd = '"' . $cmd . '"';
2679 } elseif ( php_uname( 's' ) == 'Linux' ) {
2680 $time = intval( $wgMaxShellTime );
2681 $mem = intval( $wgMaxShellMemory );
2682 $filesize = intval( $wgMaxShellFileSize );
2684 if ( $time > 0 && $mem > 0 ) {
2685 $script = "$IP/bin/ulimit4.sh";
2686 if ( is_executable( $script ) ) {
2687 $cmd = '/bin/bash ' . escapeshellarg( $script ) . " $time $mem $filesize " . escapeshellarg( $cmd );
2691 wfDebug( "wfShellExec: $cmd\n" );
2693 $retval = 1; // error by default?
2695 passthru( $cmd, $retval );
2696 $output = ob_get_contents();
2699 if ( $retval == 127 ) {
2700 wfDebugLog( 'exec', "Possibly missing executable file: $cmd\n" );
2706 * Workaround for http://bugs.php.net/bug.php?id=45132
2707 * escapeshellarg() destroys non-ASCII characters if LANG is not a UTF-8 locale
2709 function wfInitShellLocale() {
2710 static $done = false;
2715 global $wgShellLocale;
2716 if ( !wfIniGetBool( 'safe_mode' ) ) {
2717 putenv( "LC_CTYPE=$wgShellLocale" );
2718 setlocale( LC_CTYPE
, $wgShellLocale );
2723 * Generate a shell-escaped command line string to run a maintenance script.
2724 * Note that $parameters should be a flat array and an option with an argument
2725 * should consist of two consecutive items in the array (do not use "--option value").
2726 * @param $script string MediaWiki maintenance script path
2727 * @param $parameters Array Arguments and options to the script
2728 * @param $options Array Associative array of options:
2729 * 'php': The path to the php executable
2730 * 'wrapper': Path to a PHP wrapper to handle the maintenance script
2733 function wfShellMaintenanceCmd( $script, array $parameters = array(), array $options = array() ) {
2735 // Give site config file a chance to run the script in a wrapper.
2736 // The caller may likely want to call wfBasename() on $script.
2737 wfRunHooks( 'wfShellMaintenanceCmd', array( &$script, &$parameters, &$options ) );
2738 $cmd = isset( $options['php'] ) ?
array( $options['php'] ) : array( $wgPhpCli );
2739 if ( isset( $options['wrapper'] ) ) {
2740 $cmd[] = $options['wrapper'];
2743 // Escape each parameter for shell
2744 return implode( " ", array_map( 'wfEscapeShellArg', array_merge( $cmd, $parameters ) ) );
2748 * wfMerge attempts to merge differences between three texts.
2749 * Returns true for a clean merge and false for failure or a conflict.
2751 * @param $old String
2752 * @param $mine String
2753 * @param $yours String
2754 * @param $result String
2757 function wfMerge( $old, $mine, $yours, &$result ) {
2760 # This check may also protect against code injection in
2761 # case of broken installations.
2762 wfSuppressWarnings();
2763 $haveDiff3 = $wgDiff3 && file_exists( $wgDiff3 );
2764 wfRestoreWarnings();
2767 wfDebug( "diff3 not found\n" );
2771 # Make temporary files
2773 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
2774 $mytextFile = fopen( $mytextName = tempnam( $td, 'merge-mine-' ), 'w' );
2775 $yourtextFile = fopen( $yourtextName = tempnam( $td, 'merge-your-' ), 'w' );
2777 fwrite( $oldtextFile, $old );
2778 fclose( $oldtextFile );
2779 fwrite( $mytextFile, $mine );
2780 fclose( $mytextFile );
2781 fwrite( $yourtextFile, $yours );
2782 fclose( $yourtextFile );
2784 # Check for a conflict
2785 $cmd = $wgDiff3 . ' -a --overlap-only ' .
2786 wfEscapeShellArg( $mytextName ) . ' ' .
2787 wfEscapeShellArg( $oldtextName ) . ' ' .
2788 wfEscapeShellArg( $yourtextName );
2789 $handle = popen( $cmd, 'r' );
2791 if( fgets( $handle, 1024 ) ) {
2799 $cmd = $wgDiff3 . ' -a -e --merge ' .
2800 wfEscapeShellArg( $mytextName, $oldtextName, $yourtextName );
2801 $handle = popen( $cmd, 'r' );
2804 $data = fread( $handle, 8192 );
2805 if ( strlen( $data ) == 0 ) {
2811 unlink( $mytextName );
2812 unlink( $oldtextName );
2813 unlink( $yourtextName );
2815 if ( $result === '' && $old !== '' && !$conflict ) {
2816 wfDebug( "Unexpected null result from diff3. Command: $cmd\n" );
2823 * Returns unified plain-text diff of two texts.
2824 * Useful for machine processing of diffs.
2826 * @param $before String: the text before the changes.
2827 * @param $after String: the text after the changes.
2828 * @param $params String: command-line options for the diff command.
2829 * @return String: unified diff of $before and $after
2831 function wfDiff( $before, $after, $params = '-u' ) {
2832 if ( $before == $after ) {
2837 wfSuppressWarnings();
2838 $haveDiff = $wgDiff && file_exists( $wgDiff );
2839 wfRestoreWarnings();
2841 # This check may also protect against code injection in
2842 # case of broken installations.
2844 wfDebug( "diff executable not found\n" );
2845 $diffs = new Diff( explode( "\n", $before ), explode( "\n", $after ) );
2846 $format = new UnifiedDiffFormatter();
2847 return $format->format( $diffs );
2850 # Make temporary files
2852 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
2853 $newtextFile = fopen( $newtextName = tempnam( $td, 'merge-your-' ), 'w' );
2855 fwrite( $oldtextFile, $before );
2856 fclose( $oldtextFile );
2857 fwrite( $newtextFile, $after );
2858 fclose( $newtextFile );
2860 // Get the diff of the two files
2861 $cmd = "$wgDiff " . $params . ' ' . wfEscapeShellArg( $oldtextName, $newtextName );
2863 $h = popen( $cmd, 'r' );
2868 $data = fread( $h, 8192 );
2869 if ( strlen( $data ) == 0 ) {
2877 unlink( $oldtextName );
2878 unlink( $newtextName );
2880 // Kill the --- and +++ lines. They're not useful.
2881 $diff_lines = explode( "\n", $diff );
2882 if ( strpos( $diff_lines[0], '---' ) === 0 ) {
2883 unset( $diff_lines[0] );
2885 if ( strpos( $diff_lines[1], '+++' ) === 0 ) {
2886 unset( $diff_lines[1] );
2889 $diff = implode( "\n", $diff_lines );
2895 * This function works like "use VERSION" in Perl, the program will die with a
2896 * backtrace if the current version of PHP is less than the version provided
2898 * This is useful for extensions which due to their nature are not kept in sync
2899 * with releases, and might depend on other versions of PHP than the main code
2901 * Note: PHP might die due to parsing errors in some cases before it ever
2902 * manages to call this function, such is life
2904 * @see perldoc -f use
2906 * @param $req_ver Mixed: the version to check, can be a string, an integer, or
2909 function wfUsePHP( $req_ver ) {
2910 $php_ver = PHP_VERSION
;
2912 if ( version_compare( $php_ver, (string)$req_ver, '<' ) ) {
2913 throw new MWException( "PHP $req_ver required--this is only $php_ver" );
2918 * This function works like "use VERSION" in Perl except it checks the version
2919 * of MediaWiki, the program will die with a backtrace if the current version
2920 * of MediaWiki is less than the version provided.
2922 * This is useful for extensions which due to their nature are not kept in sync
2925 * @see perldoc -f use
2927 * @param $req_ver Mixed: the version to check, can be a string, an integer, or
2930 function wfUseMW( $req_ver ) {
2933 if ( version_compare( $wgVersion, (string)$req_ver, '<' ) ) {
2934 throw new MWException( "MediaWiki $req_ver required--this is only $wgVersion" );
2939 * Return the final portion of a pathname.
2940 * Reimplemented because PHP5's basename() is buggy with multibyte text.
2941 * http://bugs.php.net/bug.php?id=33898
2943 * PHP's basename() only considers '\' a pathchar on Windows and Netware.
2944 * We'll consider it so always, as we don't want \s in our Unix paths either.
2946 * @param $path String
2947 * @param $suffix String: to remove if present
2950 function wfBaseName( $path, $suffix = '' ) {
2951 $encSuffix = ( $suffix == '' )
2953 : ( '(?:' . preg_quote( $suffix, '#' ) . ')?' );
2955 if( preg_match( "#([^/\\\\]*?){$encSuffix}[/\\\\]*$#", $path, $matches ) ) {
2963 * Generate a relative path name to the given file.
2964 * May explode on non-matching case-insensitive paths,
2965 * funky symlinks, etc.
2967 * @param $path String: absolute destination path including target filename
2968 * @param $from String: Absolute source path, directory only
2971 function wfRelativePath( $path, $from ) {
2972 // Normalize mixed input on Windows...
2973 $path = str_replace( '/', DIRECTORY_SEPARATOR
, $path );
2974 $from = str_replace( '/', DIRECTORY_SEPARATOR
, $from );
2976 // Trim trailing slashes -- fix for drive root
2977 $path = rtrim( $path, DIRECTORY_SEPARATOR
);
2978 $from = rtrim( $from, DIRECTORY_SEPARATOR
);
2980 $pieces = explode( DIRECTORY_SEPARATOR
, dirname( $path ) );
2981 $against = explode( DIRECTORY_SEPARATOR
, $from );
2983 if( $pieces[0] !== $against[0] ) {
2984 // Non-matching Windows drive letters?
2985 // Return a full path.
2989 // Trim off common prefix
2990 while( count( $pieces ) && count( $against )
2991 && $pieces[0] == $against[0] ) {
2992 array_shift( $pieces );
2993 array_shift( $against );
2996 // relative dots to bump us to the parent
2997 while( count( $against ) ) {
2998 array_unshift( $pieces, '..' );
2999 array_shift( $against );
3002 array_push( $pieces, wfBaseName( $path ) );
3004 return implode( DIRECTORY_SEPARATOR
, $pieces );
3008 * Do any deferred updates and clear the list
3010 * @deprecated since 1.19
3011 * @see DeferredUpdates::doUpdate()
3012 * @param $commit string
3014 function wfDoUpdates( $commit = '' ) {
3015 DeferredUpdates
::doUpdates( $commit );
3019 * Convert an arbitrarily-long digit string from one numeric base
3020 * to another, optionally zero-padding to a minimum column width.
3022 * Supports base 2 through 36; digit values 10-36 are represented
3023 * as lowercase letters a-z. Input is case-insensitive.
3025 * @param $input String: of digits
3026 * @param $sourceBase Integer: 2-36
3027 * @param $destBase Integer: 2-36
3028 * @param $pad Integer: 1 or greater
3029 * @param $lowercase Boolean
3030 * @return String or false on invalid input
3032 function wfBaseConvert( $input, $sourceBase, $destBase, $pad = 1, $lowercase = true ) {
3033 $input = strval( $input );
3034 if( $sourceBase < 2 ||
3039 $sourceBase != intval( $sourceBase ) ||
3040 $destBase != intval( $destBase ) ||
3041 $pad != intval( $pad ) ||
3042 !is_string( $input ) ||
3046 $digitChars = ( $lowercase ) ?
'0123456789abcdefghijklmnopqrstuvwxyz' : '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
3047 $inDigits = array();
3050 // Decode and validate input string
3051 $input = strtolower( $input );
3052 for( $i = 0; $i < strlen( $input ); $i++
) {
3053 $n = strpos( $digitChars, $input[$i] );
3054 if( $n === false ||
$n > $sourceBase ) {
3060 // Iterate over the input, modulo-ing out an output digit
3061 // at a time until input is gone.
3062 while( count( $inDigits ) ) {
3064 $workDigits = array();
3067 foreach( $inDigits as $digit ) {
3068 $work *= $sourceBase;
3071 if( $work < $destBase ) {
3072 // Gonna need to pull another digit.
3073 if( count( $workDigits ) ) {
3074 // Avoid zero-padding; this lets us find
3075 // the end of the input very easily when
3076 // length drops to zero.
3080 // Finally! Actual division!
3081 $workDigits[] = intval( $work / $destBase );
3083 // Isn't it annoying that most programming languages
3084 // don't have a single divide-and-remainder operator,
3085 // even though the CPU implements it that way?
3086 $work = $work %
$destBase;
3090 // All that division leaves us with a remainder,
3091 // which is conveniently our next output digit.
3092 $outChars .= $digitChars[$work];
3095 $inDigits = $workDigits;
3098 while( strlen( $outChars ) < $pad ) {
3102 return strrev( $outChars );
3106 * Create an object with a given name and an array of construct parameters
3108 * @param $name String
3109 * @param $p Array: parameters
3111 * @deprecated since 1.18, warnings in 1.18, removal in 1.20
3113 function wfCreateObject( $name, $p ) {
3114 wfDeprecated( __FUNCTION__
);
3115 return MWFunction
::newObj( $name, $p );
3121 function wfHttpOnlySafe() {
3122 global $wgHttpOnlyBlacklist;
3124 if( isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
3125 foreach( $wgHttpOnlyBlacklist as $regex ) {
3126 if( preg_match( $regex, $_SERVER['HTTP_USER_AGENT'] ) ) {
3136 * Initialise php session
3138 * @param $sessionId Bool
3140 function wfSetupSession( $sessionId = false ) {
3141 global $wgSessionsInMemcached, $wgCookiePath, $wgCookieDomain,
3142 $wgCookieSecure, $wgCookieHttpOnly, $wgSessionHandler;
3143 if( $wgSessionsInMemcached ) {
3144 if ( !defined( 'MW_COMPILED' ) ) {
3146 require_once( "$IP/includes/cache/MemcachedSessions.php" );
3148 session_set_save_handler( 'memsess_open', 'memsess_close', 'memsess_read',
3149 'memsess_write', 'memsess_destroy', 'memsess_gc' );
3151 // It's necessary to register a shutdown function to call session_write_close(),
3152 // because by the time the request shutdown function for the session module is
3153 // called, $wgMemc has already been destroyed. Shutdown functions registered
3154 // this way are called before object destruction.
3155 register_shutdown_function( 'memsess_write_close' );
3156 } elseif( $wgSessionHandler && $wgSessionHandler != ini_get( 'session.save_handler' ) ) {
3157 # Only set this if $wgSessionHandler isn't null and session.save_handler
3158 # hasn't already been set to the desired value (that causes errors)
3159 ini_set( 'session.save_handler', $wgSessionHandler );
3161 $httpOnlySafe = wfHttpOnlySafe() && $wgCookieHttpOnly;
3162 wfDebugLog( 'cookie',
3163 'session_set_cookie_params: "' . implode( '", "',
3169 $httpOnlySafe ) ) . '"' );
3170 session_set_cookie_params( 0, $wgCookiePath, $wgCookieDomain, $wgCookieSecure, $httpOnlySafe );
3171 session_cache_limiter( 'private, must-revalidate' );
3173 session_id( $sessionId );
3175 wfSuppressWarnings();
3177 wfRestoreWarnings();
3181 * Get an object from the precompiled serialized directory
3183 * @param $name String
3184 * @return Mixed: the variable on success, false on failure
3186 function wfGetPrecompiledData( $name ) {
3189 $file = "$IP/serialized/$name";
3190 if ( file_exists( $file ) ) {
3191 $blob = file_get_contents( $file );
3193 return unserialize( $blob );
3205 function wfMemcKey( /*... */ ) {
3206 $args = func_get_args();
3207 $key = wfWikiID() . ':' . implode( ':', $args );
3208 $key = str_replace( ' ', '_', $key );
3213 * Get a cache key for a foreign DB
3216 * @param $prefix String
3217 * @param varargs String
3220 function wfForeignMemcKey( $db, $prefix /*, ... */ ) {
3221 $args = array_slice( func_get_args(), 2 );
3223 $key = "$db-$prefix:" . implode( ':', $args );
3225 $key = $db . ':' . implode( ':', $args );
3231 * Get an ASCII string identifying this wiki
3232 * This is used as a prefix in memcached keys
3236 function wfWikiID() {
3237 global $wgDBprefix, $wgDBname, $wgWikiID;
3238 if ( $wgWikiID !== false ) {
3240 } elseif ( $wgDBprefix ) {
3241 return "$wgDBname-$wgDBprefix";
3248 * Split a wiki ID into DB name and table prefix
3250 * @param $wiki String
3254 function wfSplitWikiID( $wiki ) {
3255 $bits = explode( '-', $wiki, 2 );
3256 if ( count( $bits ) < 2 ) {
3263 * Get a Database object.
3265 * @param $db Integer: index of the connection to get. May be DB_MASTER for the
3266 * master (for write queries), DB_SLAVE for potentially lagged read
3267 * queries, or an integer >= 0 for a particular server.
3269 * @param $groups Mixed: query groups. An array of group names that this query
3270 * belongs to. May contain a single string if the query is only
3273 * @param $wiki String: the wiki ID, or false for the current wiki
3275 * Note: multiple calls to wfGetDB(DB_SLAVE) during the course of one request
3276 * will always return the same object, unless the underlying connection or load
3277 * balancer is manually destroyed.
3279 * Note 2: use $this->getDB() in maintenance scripts that may be invoked by
3280 * updater to ensure that a proper database is being updated.
3282 * @return DatabaseBase
3284 function &wfGetDB( $db, $groups = array(), $wiki = false ) {
3285 return wfGetLB( $wiki )->getConnection( $db, $groups, $wiki );
3289 * Get a load balancer object.
3291 * @param $wiki String: wiki ID, or false for the current wiki
3292 * @return LoadBalancer
3294 function wfGetLB( $wiki = false ) {
3295 return wfGetLBFactory()->getMainLB( $wiki );
3299 * Get the load balancer factory object
3303 function &wfGetLBFactory() {
3304 return LBFactory
::singleton();
3309 * Shortcut for RepoGroup::singleton()->findFile()
3311 * @param $title String or Title object
3312 * @param $options Associative array of options:
3313 * time: requested time for an archived image, or false for the
3314 * current version. An image object will be returned which was
3315 * created at the specified time.
3317 * ignoreRedirect: If true, do not follow file redirects
3319 * private: If true, return restricted (deleted) files if the current
3320 * user is allowed to view them. Otherwise, such files will not
3323 * bypassCache: If true, do not use the process-local cache of File objects
3325 * @return File, or false if the file does not exist
3327 function wfFindFile( $title, $options = array() ) {
3328 return RepoGroup
::singleton()->findFile( $title, $options );
3332 * Get an object referring to a locally registered file.
3333 * Returns a valid placeholder object if the file does not exist.
3335 * @param $title Title or String
3336 * @return File|null A File, or null if passed an invalid Title
3338 function wfLocalFile( $title ) {
3339 return RepoGroup
::singleton()->getLocalRepo()->newFile( $title );
3343 * Stream a file to the browser. Back-compat alias for StreamFile::stream()
3344 * @deprecated since 1.19
3346 function wfStreamFile( $fname, $headers = array() ) {
3347 StreamFile
::stream( $fname, $headers );
3351 * Should low-performance queries be disabled?
3354 * @codeCoverageIgnore
3356 function wfQueriesMustScale() {
3357 global $wgMiserMode;
3359 ||
( SiteStats
::pages() > 100000
3360 && SiteStats
::edits() > 1000000
3361 && SiteStats
::users() > 10000 );
3365 * Get the path to a specified script file, respecting file
3366 * extensions; this is a wrapper around $wgScriptExtension etc.
3368 * @param $script String: script filename, sans extension
3371 function wfScript( $script = 'index' ) {
3372 global $wgScriptPath, $wgScriptExtension;
3373 return "{$wgScriptPath}/{$script}{$wgScriptExtension}";
3377 * Get the script URL.
3379 * @return script URL
3381 function wfGetScriptUrl() {
3382 if( isset( $_SERVER['SCRIPT_NAME'] ) ) {
3384 # as it was called, minus the query string.
3386 # Some sites use Apache rewrite rules to handle subdomains,
3387 # and have PHP set up in a weird way that causes PHP_SELF
3388 # to contain the rewritten URL instead of the one that the
3389 # outside world sees.
3391 # If in this mode, use SCRIPT_URL instead, which mod_rewrite
3392 # provides containing the "before" URL.
3393 return $_SERVER['SCRIPT_NAME'];
3395 return $_SERVER['URL'];
3400 * Convenience function converts boolean values into "true"
3401 * or "false" (string) values
3403 * @param $value Boolean
3406 function wfBoolToStr( $value ) {
3407 return $value ?
'true' : 'false';
3411 * Load an extension messages file
3413 * @deprecated since 1.16, warnings in 1.18, remove in 1.20
3414 * @codeCoverageIgnore
3416 function wfLoadExtensionMessages() {
3417 wfDeprecated( __FUNCTION__
);
3421 * Get a platform-independent path to the null file, e.g. /dev/null
3425 function wfGetNull() {
3426 return wfIsWindows()
3432 * Throws a warning that $function is deprecated
3434 * @param $function String
3435 * @param $version String
3438 function wfDeprecated( $function, $version = false ) {
3439 static $functionsWarned = array();
3440 if ( !isset( $functionsWarned[$function] ) ) {
3441 $functionsWarned[$function] = true;
3443 global $wgDeprecationReleaseLimit;
3444 if ( $wgDeprecationReleaseLimit ) {
3445 # Strip -* off the end of $version so that branches can use the
3446 # format #.##-branchname to avoid issues if the branch is merged into
3447 # a version of MediaWiki later than what it was branched from
3448 $comparableVersion = preg_replace( '/-.*$/', '', $version );
3449 # If the comparableVersion is larger than our release limit then
3450 # skip the warning message for the deprecation
3451 if ( version_compare( $wgDeprecationReleaseLimit, $comparableVersion, '<' ) ) {
3455 wfWarn( "Use of $function was deprecated in $version.", 2 );
3457 wfWarn( "Use of $function is deprecated.", 2 );
3463 * Send a warning either to the debug log or in a PHP error depending on
3464 * $wgDevelopmentWarnings
3466 * @param $msg String: message to send
3467 * @param $callerOffset Integer: number of items to go back in the backtrace to
3468 * find the correct caller (1 = function calling wfWarn, ...)
3469 * @param $level Integer: PHP error level; only used when $wgDevelopmentWarnings
3472 function wfWarn( $msg, $callerOffset = 1, $level = E_USER_NOTICE
) {
3473 global $wgDevelopmentWarnings;
3475 $callers = wfDebugBacktrace();
3476 if ( isset( $callers[$callerOffset +
1] ) ) {
3477 $callerfunc = $callers[$callerOffset +
1];
3478 $callerfile = $callers[$callerOffset];
3479 if ( isset( $callerfile['file'] ) && isset( $callerfile['line'] ) ) {
3480 $file = $callerfile['file'] . ' at line ' . $callerfile['line'];
3482 $file = '(internal function)';
3485 if ( isset( $callerfunc['class'] ) ) {
3486 $func .= $callerfunc['class'] . '::';
3488 if ( isset( $callerfunc['function'] ) ) {
3489 $func .= $callerfunc['function'];
3491 $msg .= " [Called from $func in $file]";
3494 if ( $wgDevelopmentWarnings ) {
3495 trigger_error( $msg, $level );
3497 wfDebug( "$msg\n" );
3502 * Modern version of wfWaitForSlaves(). Instead of looking at replication lag
3503 * and waiting for it to go down, this waits for the slaves to catch up to the
3504 * master position. Use this when updating very large numbers of rows, as
3505 * in maintenance scripts, to avoid causing too much lag. Of course, this is
3506 * a no-op if there are no slaves.
3508 * @param $maxLag Integer (deprecated)
3509 * @param $wiki mixed Wiki identifier accepted by wfGetLB
3511 function wfWaitForSlaves( $maxLag = false, $wiki = false ) {
3512 $lb = wfGetLB( $wiki );
3513 // bug 27975 - Don't try to wait for slaves if there are none
3514 // Prevents permission error when getting master position
3515 if ( $lb->getServerCount() > 1 ) {
3516 $dbw = $lb->getConnection( DB_MASTER
);
3517 $pos = $dbw->getMasterPos();
3518 $lb->waitForAll( $pos );
3523 * Used to be used for outputting text in the installer/updater
3524 * @deprecated since 1.18, warnings in 1.18, remove in 1.20
3526 function wfOut( $s ) {
3527 wfDeprecated( __METHOD__
);
3528 global $wgCommandLineMode;
3529 if ( $wgCommandLineMode ) {
3532 echo htmlspecialchars( $s );
3538 * Count down from $n to zero on the terminal, with a one-second pause
3539 * between showing each number. For use in command-line scripts.
3540 * @codeCoverageIgnore
3543 function wfCountDown( $n ) {
3544 for ( $i = $n; $i >= 0; $i-- ) {
3546 echo str_repeat( "\x08", strlen( $i +
1 ) );
3558 * Generate a random 32-character hexadecimal token.
3559 * @param $salt Mixed: some sort of salt, if necessary, to add to random
3560 * characters before hashing.
3562 * @codeCoverageIgnore
3564 function wfGenerateToken( $salt = '' ) {
3565 $salt = serialize( $salt );
3566 return md5( mt_rand( 0, 0x7fffffff ) . $salt );
3570 * Replace all invalid characters with -
3572 * @param $name Mixed: filename to process
3575 function wfStripIllegalFilenameChars( $name ) {
3576 global $wgIllegalFileChars;
3577 $name = wfBaseName( $name );
3578 $name = preg_replace(
3579 "/[^" . Title
::legalChars() . "]" .
3580 ( $wgIllegalFileChars ?
"|[" . $wgIllegalFileChars . "]" : '' ) .
3589 * Set PHP's memory limit to the larger of php.ini or $wgMemoryLimit;
3591 * @return Integer value memory was set to.
3593 function wfMemoryLimit() {
3594 global $wgMemoryLimit;
3595 $memlimit = wfShorthandToInteger( ini_get( 'memory_limit' ) );
3596 if( $memlimit != -1 ) {
3597 $conflimit = wfShorthandToInteger( $wgMemoryLimit );
3598 if( $conflimit == -1 ) {
3599 wfDebug( "Removing PHP's memory limit\n" );
3600 wfSuppressWarnings();
3601 ini_set( 'memory_limit', $conflimit );
3602 wfRestoreWarnings();
3604 } elseif ( $conflimit > $memlimit ) {
3605 wfDebug( "Raising PHP's memory limit to $conflimit bytes\n" );
3606 wfSuppressWarnings();
3607 ini_set( 'memory_limit', $conflimit );
3608 wfRestoreWarnings();
3616 * Converts shorthand byte notation to integer form
3618 * @param $string String
3621 function wfShorthandToInteger( $string = '' ) {
3622 $string = trim( $string );
3623 if( $string === '' ) {
3626 $last = $string[strlen( $string ) - 1];
3627 $val = intval( $string );
3632 // break intentionally missing
3636 // break intentionally missing
3646 * Get the normalised IETF language tag
3647 * See unit test for examples.
3649 * @param $code String: The language code.
3650 * @return String: The language code which complying with BCP 47 standards.
3652 function wfBCP47( $code ) {
3653 $codeSegment = explode( '-', $code );
3655 foreach ( $codeSegment as $segNo => $seg ) {
3656 if ( count( $codeSegment ) > 0 ) {
3657 // when previous segment is x, it is a private segment and should be lc
3658 if( $segNo > 0 && strtolower( $codeSegment[( $segNo - 1 )] ) == 'x' ) {
3659 $codeBCP[$segNo] = strtolower( $seg );
3660 // ISO 3166 country code
3661 } elseif ( ( strlen( $seg ) == 2 ) && ( $segNo > 0 ) ) {
3662 $codeBCP[$segNo] = strtoupper( $seg );
3663 // ISO 15924 script code
3664 } elseif ( ( strlen( $seg ) == 4 ) && ( $segNo > 0 ) ) {
3665 $codeBCP[$segNo] = ucfirst( strtolower( $seg ) );
3666 // Use lowercase for other cases
3668 $codeBCP[$segNo] = strtolower( $seg );
3671 // Use lowercase for single segment
3672 $codeBCP[$segNo] = strtolower( $seg );
3675 $langCode = implode( '-', $codeBCP );
3680 * Get a cache object.
3682 * @param $inputType integer Cache type, one the the CACHE_* constants.
3685 function wfGetCache( $inputType ) {
3686 return ObjectCache
::getInstance( $inputType );
3690 * Get the main cache object
3694 function wfGetMainCache() {
3695 global $wgMainCacheType;
3696 return ObjectCache
::getInstance( $wgMainCacheType );
3700 * Get the cache object used by the message cache
3704 function wfGetMessageCacheStorage() {
3705 global $wgMessageCacheType;
3706 return ObjectCache
::getInstance( $wgMessageCacheType );
3710 * Get the cache object used by the parser cache
3714 function wfGetParserCacheStorage() {
3715 global $wgParserCacheType;
3716 return ObjectCache
::getInstance( $wgParserCacheType );
3720 * Call hook functions defined in $wgHooks
3722 * @param $event String: event name
3723 * @param $args Array: parameters passed to hook functions
3726 function wfRunHooks( $event, $args = array() ) {
3727 return Hooks
::run( $event, $args );
3731 * Wrapper around php's unpack.
3733 * @param $format String: The format string (See php's docs)
3734 * @param $data: A binary string of binary data
3735 * @param $length integer or false: The minimun length of $data. This is to
3736 * prevent reading beyond the end of $data. false to disable the check.
3738 * Also be careful when using this function to read unsigned 32 bit integer
3739 * because php might make it negative.
3741 * @throws MWException if $data not long enough, or if unpack fails
3742 * @return Associative array of the extracted data
3744 function wfUnpack( $format, $data, $length=false ) {
3745 if ( $length !== false ) {
3746 $realLen = strlen( $data );
3747 if ( $realLen < $length ) {
3748 throw new MWException( "Tried to use wfUnpack on a "
3749 . "string of length $realLen, but needed one "
3750 . "of at least length $length."
3755 wfSuppressWarnings();
3756 $result = unpack( $format, $data );
3757 wfRestoreWarnings();
3759 if ( $result === false ) {
3760 // If it cannot extract the packed data.
3761 throw new MWException( "unpack could not unpack binary data" );