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, '?' ) ) {
431 define( 'PROT_HTTP', 'http://' );
432 define( 'PROT_HTTPS', 'https://' );
433 define( 'PROT_RELATIVE', '//' );
434 define( 'PROT_CURRENT', null );
437 * Expand a potentially local URL to a fully-qualified URL. Assumes $wgServer
440 * The meaning of the PROT_* constants is as follows:
441 * PROT_HTTP: Output a URL starting with http://
442 * PROT_HTTPS: Output a URL starting with https://
443 * PROT_RELATIVE: Output a URL starting with // (protocol-relative URL)
444 * PROT_CURRENT: Output a URL starting with either http:// or https:// , depending on which protocol was used for the current incoming request
446 * @todo this won't work with current-path-relative URLs
447 * like "subdir/foo.html", etc.
449 * @param $url String: either fully-qualified or a local path + query
450 * @param $defaultProto Mixed: one of the PROT_* constants. Determines the protocol to use if $url or $wgServer is protocol-relative
451 * @return string Fully-qualified URL
453 function wfExpandUrl( $url, $defaultProto = PROT_CURRENT
) {
455 if ( $defaultProto === PROT_CURRENT
) {
456 $defaultProto = WebRequest
::detectProtocol() . '://';
459 // Analyze $wgServer to obtain its protocol
460 $bits = wfParseUrl( $wgServer );
461 $serverHasProto = $bits && $bits['scheme'] != '';
462 $defaultProtoWithoutSlashes = substr( $defaultProto, 0, -2 );
464 if( substr( $url, 0, 2 ) == '//' ) {
465 return $defaultProtoWithoutSlashes . $url;
466 } elseif( substr( $url, 0, 1 ) == '/' ) {
467 // If $wgServer is protocol-relative, prepend $defaultProtoWithoutSlashes, otherwise leave it alone
468 return ( $serverHasProto ?
'' : $defaultProtoWithoutSlashes ) . $wgServer . $url;
475 * Returns a regular expression of url protocols
479 function wfUrlProtocols() {
480 global $wgUrlProtocols;
482 static $retval = null;
483 if ( !is_null( $retval ) ) {
487 // Support old-style $wgUrlProtocols strings, for backwards compatibility
488 // with LocalSettings files from 1.5
489 if ( is_array( $wgUrlProtocols ) ) {
490 $protocols = array();
491 foreach ( $wgUrlProtocols as $protocol ) {
492 $protocols[] = preg_quote( $protocol, '/' );
495 $retval = implode( '|', $protocols );
497 $retval = $wgUrlProtocols;
503 * parse_url() work-alike, but non-broken. Differences:
505 * 1) Does not raise warnings on bad URLs (just returns false)
506 * 2) Handles protocols that don't use :// (e.g., mailto: and news: , as well as protocol-relative URLs) correctly
507 * 3) Adds a "delimiter" element to the array, either '://', ':' or '//' (see (2))
509 * @param $url String: a URL to parse
510 * @return Array: bits of the URL in an associative array, per PHP docs
512 function wfParseUrl( $url ) {
513 global $wgUrlProtocols; // Allow all protocols defined in DefaultSettings/LocalSettings.php
515 // Protocol-relative URLs are handled really badly by parse_url(). It's so bad that the easiest
516 // way to handle them is to just prepend 'http:' and strip the protocol out later
517 $wasRelative = substr( $url, 0, 2 ) == '//';
518 if ( $wasRelative ) {
521 wfSuppressWarnings();
522 $bits = parse_url( $url );
528 // most of the protocols are followed by ://, but mailto: and sometimes news: not, check for it
529 if ( in_array( $bits['scheme'] . '://', $wgUrlProtocols ) ) {
530 $bits['delimiter'] = '://';
531 } elseif ( in_array( $bits['scheme'] . ':', $wgUrlProtocols ) ) {
532 $bits['delimiter'] = ':';
533 // parse_url detects for news: and mailto: the host part of an url as path
534 // We have to correct this wrong detection
535 if ( isset( $bits['path'] ) ) {
536 $bits['host'] = $bits['path'];
543 /* Provide an empty host for eg. file:/// urls (see bug 28627) */
544 if ( !isset( $bits['host'] ) ) {
547 /* parse_url loses the third / for file:///c:/ urls (but not on variants) */
548 if ( substr( $bits['path'], 0, 1 ) !== '/' ) {
549 $bits['path'] = '/' . $bits['path'];
553 // If the URL was protocol-relative, fix scheme and delimiter
554 if ( $wasRelative ) {
555 $bits['scheme'] = '';
556 $bits['delimiter'] = '//';
562 * Make a URL index, appropriate for the el_index field of externallinks.
567 function wfMakeUrlIndex( $url ) {
568 $bits = wfParseUrl( $url );
570 // Reverse the labels in the hostname, convert to lower case
571 // For emails reverse domainpart only
572 if ( $bits['scheme'] == 'mailto' ) {
573 $mailparts = explode( '@', $bits['host'], 2 );
574 if ( count( $mailparts ) === 2 ) {
575 $domainpart = strtolower( implode( '.', array_reverse( explode( '.', $mailparts[1] ) ) ) );
577 // No domain specified, don't mangle it
580 $reversedHost = $domainpart . '@' . $mailparts[0];
582 $reversedHost = strtolower( implode( '.', array_reverse( explode( '.', $bits['host'] ) ) ) );
584 // Add an extra dot to the end
585 // Why? Is it in wrong place in mailto links?
586 if ( substr( $reversedHost, -1, 1 ) !== '.' ) {
587 $reversedHost .= '.';
589 // Reconstruct the pseudo-URL
590 $prot = $bits['scheme'];
591 $index = $prot . $bits['delimiter'] . $reversedHost;
592 // Leave out user and password. Add the port, path, query and fragment
593 if ( isset( $bits['port'] ) ) {
594 $index .= ':' . $bits['port'];
596 if ( isset( $bits['path'] ) ) {
597 $index .= $bits['path'];
601 if ( isset( $bits['query'] ) ) {
602 $index .= '?' . $bits['query'];
604 if ( isset( $bits['fragment'] ) ) {
605 $index .= '#' . $bits['fragment'];
611 * Sends a line to the debug log if enabled or, optionally, to a comment in output.
612 * In normal operation this is a NOP.
614 * Controlling globals:
615 * $wgDebugLogFile - points to the log file
616 * $wgProfileOnly - if set, normal debug messages will not be recorded.
617 * $wgDebugRawPage - if false, 'action=raw' hits will not result in debug output.
618 * $wgDebugComments - if on, some debug items may appear in comments in the HTML output.
620 * @param $text String
621 * @param $logonly Bool: set true to avoid appearing in HTML when $wgDebugComments is set
623 function wfDebug( $text, $logonly = false ) {
624 global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly, $wgDebugRawPage;
625 global $wgDebugLogPrefix, $wgShowDebug;
627 static $cache = array(); // Cache of unoutputted messages
628 $text = wfDebugTimer() . $text;
630 if ( !$wgDebugRawPage && wfIsDebugRawPage() ) {
634 if ( ( $wgDebugComments ||
$wgShowDebug ) && !$logonly ) {
637 if ( isset( $wgOut ) && is_object( $wgOut ) ) {
638 // add the message and any cached messages to the output
639 array_map( array( $wgOut, 'debug' ), $cache );
643 if ( wfRunHooks( 'Debug', array( $text, null /* no log group */ ) ) ) {
644 if ( $wgDebugLogFile != '' && !$wgProfileOnly ) {
645 # Strip unprintables; they can switch terminal modes when binary data
646 # gets dumped, which is pretty annoying.
647 $text = preg_replace( '![\x00-\x08\x0b\x0c\x0e-\x1f]!', ' ', $text );
648 $text = $wgDebugLogPrefix . $text;
649 wfErrorLog( $text, $wgDebugLogFile );
655 * Returns true if debug logging should be suppressed if $wgDebugRawPage = false
657 function wfIsDebugRawPage() {
659 if ( $cache !== null ) {
662 # Check for raw action using $_GET not $wgRequest, since the latter might not be initialised yet
663 if ( ( isset( $_GET['action'] ) && $_GET['action'] == 'raw' )
665 isset( $_SERVER['SCRIPT_NAME'] )
666 && substr( $_SERVER['SCRIPT_NAME'], -8 ) == 'load.php'
677 * Get microsecond timestamps for debug logs
681 function wfDebugTimer() {
682 global $wgDebugTimestamps;
683 if ( !$wgDebugTimestamps ) {
686 static $start = null;
688 if ( $start === null ) {
689 $start = microtime( true );
690 $prefix = "\n$start";
692 $prefix = sprintf( "%6.4f", microtime( true ) - $start );
695 return $prefix . ' ';
699 * Send a line giving PHP memory usage.
701 * @param $exact Bool: print exact values instead of kilobytes (default: false)
703 function wfDebugMem( $exact = false ) {
704 $mem = memory_get_usage();
706 $mem = floor( $mem / 1024 ) . ' kilobytes';
710 wfDebug( "Memory usage: $mem\n" );
714 * Send a line to a supplementary debug log file, if configured, or main debug log if not.
715 * $wgDebugLogGroups[$logGroup] should be set to a filename to send to a separate log.
717 * @param $logGroup String
718 * @param $text String
719 * @param $public Bool: whether to log the event in the public log if no private
720 * log file is specified, (default true)
722 function wfDebugLog( $logGroup, $text, $public = true ) {
723 global $wgDebugLogGroups, $wgShowHostnames;
724 $text = trim( $text ) . "\n";
725 if( isset( $wgDebugLogGroups[$logGroup] ) ) {
726 $time = wfTimestamp( TS_DB
);
728 if ( $wgShowHostnames ) {
729 $host = wfHostname();
733 if ( wfRunHooks( 'Debug', array( $text, $logGroup ) ) ) {
734 wfErrorLog( "$time $host $wiki: $text", $wgDebugLogGroups[$logGroup] );
736 } elseif ( $public === true ) {
737 wfDebug( $text, true );
742 * Log for database errors
744 * @param $text String: database error message.
746 function wfLogDBError( $text ) {
747 global $wgDBerrorLog, $wgDBname;
748 if ( $wgDBerrorLog ) {
749 $host = trim(`hostname`
);
750 $text = date( 'D M j G:i:s T Y' ) . "\t$host\t$wgDBname\t$text";
751 wfErrorLog( $text, $wgDBerrorLog );
756 * Log to a file without getting "file size exceeded" signals.
758 * Can also log to TCP or UDP with the syntax udp://host:port/prefix. This will
759 * send lines to the specified port, prefixed by the specified prefix and a space.
761 * @param $text String
762 * @param $file String filename
764 function wfErrorLog( $text, $file ) {
765 if ( substr( $file, 0, 4 ) == 'udp:' ) {
766 # Needs the sockets extension
767 if ( preg_match( '!^(tcp|udp):(?://)?\[([0-9a-fA-F:]+)\]:(\d+)(?:/(.*))?$!', $file, $m ) ) {
768 // IPv6 bracketed host
770 $port = intval( $m[3] );
771 $prefix = isset( $m[4] ) ?
$m[4] : false;
773 } elseif ( preg_match( '!^(tcp|udp):(?://)?([a-zA-Z0-9.-]+):(\d+)(?:/(.*))?$!', $file, $m ) ) {
775 if ( !IP
::isIPv4( $host ) ) {
776 $host = gethostbyname( $host );
778 $port = intval( $m[3] );
779 $prefix = isset( $m[4] ) ?
$m[4] : false;
782 throw new MWException( __METHOD__
. ': Invalid UDP specification' );
785 // Clean it up for the multiplexer
786 if ( strval( $prefix ) !== '' ) {
787 $text = preg_replace( '/^/m', $prefix . ' ', $text );
790 if ( strlen( $text ) > 65534 ) {
791 $text = substr( $text, 0, 65534 );
794 if ( substr( $text, -1 ) != "\n" ) {
797 } elseif ( strlen( $text ) > 65535 ) {
798 $text = substr( $text, 0, 65535 );
801 $sock = socket_create( $domain, SOCK_DGRAM
, SOL_UDP
);
805 socket_sendto( $sock, $text, strlen( $text ), 0, $host, $port );
806 socket_close( $sock );
808 wfSuppressWarnings();
809 $exists = file_exists( $file );
810 $size = $exists ?
filesize( $file ) : false;
811 if ( !$exists ||
( $size !== false && $size +
strlen( $text ) < 0x7fffffff ) ) {
812 file_put_contents( $file, $text, FILE_APPEND
);
821 function wfLogProfilingData() {
822 global $wgRequestTime, $wgDebugLogFile, $wgDebugRawPage, $wgRequest;
823 global $wgProfileLimit, $wgUser;
825 $profiler = Profiler
::instance();
827 # Profiling must actually be enabled...
828 if ( $profiler->isStub() ) {
832 // Get total page request time and only show pages that longer than
833 // $wgProfileLimit time (default is 0)
835 $elapsed = $now - $wgRequestTime;
836 if ( $elapsed <= $wgProfileLimit ) {
840 $profiler->logData();
842 // Check whether this should be logged in the debug file.
843 if ( $wgDebugLogFile == '' ||
( !$wgDebugRawPage && wfIsDebugRawPage() ) ) {
848 if ( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
849 $forward = ' forwarded for ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
851 if ( !empty( $_SERVER['HTTP_CLIENT_IP'] ) ) {
852 $forward .= ' client IP ' . $_SERVER['HTTP_CLIENT_IP'];
854 if ( !empty( $_SERVER['HTTP_FROM'] ) ) {
855 $forward .= ' from ' . $_SERVER['HTTP_FROM'];
858 $forward = "\t(proxied via {$_SERVER['REMOTE_ADDR']}{$forward})";
860 // Don't load $wgUser at this late stage just for statistics purposes
861 // @todo FIXME: We can detect some anons even if it is not loaded. See User::getId()
862 if ( $wgUser->isItemLoaded( 'id' ) && $wgUser->isAnon() ) {
865 $log = sprintf( "%s\t%04.3f\t%s\n",
866 gmdate( 'YmdHis' ), $elapsed,
867 urldecode( $wgRequest->getRequestURL() . $forward ) );
869 wfErrorLog( $log . $profiler->getOutput(), $wgDebugLogFile );
873 * Check if the wiki read-only lock file is present. This can be used to lock
874 * off editing functions, but doesn't guarantee that the database will not be
879 function wfReadOnly() {
880 global $wgReadOnlyFile, $wgReadOnly;
882 if ( !is_null( $wgReadOnly ) ) {
883 return (bool)$wgReadOnly;
885 if ( $wgReadOnlyFile == '' ) {
888 // Set $wgReadOnly for faster access next time
889 if ( is_file( $wgReadOnlyFile ) ) {
890 $wgReadOnly = file_get_contents( $wgReadOnlyFile );
894 return (bool)$wgReadOnly;
897 function wfReadOnlyReason() {
904 * Return a Language object from $langcode
906 * @param $langcode Mixed: either:
907 * - a Language object
908 * - code of the language to get the message for, if it is
909 * a valid code create a language for that language, if
910 * it is a string but not a valid code then make a basic
912 * - a boolean: if it's false then use the current users
913 * language (as a fallback for the old parameter
914 * functionality), or if it is true then use the wikis
915 * @return Language object
917 function wfGetLangObj( $langcode = false ) {
918 # Identify which language to get or create a language object for.
919 # Using is_object here due to Stub objects.
920 if( is_object( $langcode ) ) {
921 # Great, we already have the object (hopefully)!
925 global $wgContLang, $wgLanguageCode;
926 if( $langcode === true ||
$langcode === $wgLanguageCode ) {
927 # $langcode is the language code of the wikis content language object.
928 # or it is a boolean and value is true
933 if( $langcode === false ||
$langcode === $wgLang->getCode() ) {
934 # $langcode is the language code of user language object.
935 # or it was a boolean and value is false
939 $validCodes = array_keys( Language
::getLanguageNames() );
940 if( in_array( $langcode, $validCodes ) ) {
941 # $langcode corresponds to a valid language.
942 return Language
::factory( $langcode );
945 # $langcode is a string, but not a valid language code; use content language.
946 wfDebug( "Invalid language code passed to wfGetLangObj, falling back to content language.\n" );
951 * Old function when $wgBetterDirectionality existed
952 * Removed in core, kept in extensions for backwards compat.
954 * @deprecated since 1.18
957 function wfUILang() {
963 * This is the new function for getting translated interface messages.
964 * See the Message class for documentation how to use them.
965 * The intention is that this function replaces all old wfMsg* functions.
966 * @param $key \string Message key.
967 * Varargs: normal message parameters.
971 function wfMessage( $key /*...*/) {
972 $params = func_get_args();
973 array_shift( $params );
974 if ( isset( $params[0] ) && is_array( $params[0] ) ) {
975 $params = $params[0];
977 return new Message( $key, $params );
981 * This function accepts multiple message keys and returns a message instance
982 * for the first message which is non-empty. If all messages are empty then an
983 * instance of the first message key is returned.
984 * @param varargs: message keys
988 function wfMessageFallback( /*...*/ ) {
989 $args = func_get_args();
990 return MWFunction
::callArray( 'Message::newFallbackSequence', $args );
994 * Get a message from anywhere, for the current user language.
996 * Use wfMsgForContent() instead if the message should NOT
997 * change depending on the user preferences.
999 * @param $key String: lookup key for the message, usually
1000 * defined in languages/Language.php
1002 * Parameters to the message, which can be used to insert variable text into
1003 * it, can be passed to this function in the following formats:
1004 * - One per argument, starting at the second parameter
1005 * - As an array in the second parameter
1006 * These are not shown in the function definition.
1010 function wfMsg( $key ) {
1011 $args = func_get_args();
1012 array_shift( $args );
1013 return wfMsgReal( $key, $args );
1017 * Same as above except doesn't transform the message
1019 * @param $key String
1022 function wfMsgNoTrans( $key ) {
1023 $args = func_get_args();
1024 array_shift( $args );
1025 return wfMsgReal( $key, $args, true, false, false );
1029 * Get a message from anywhere, for the current global language
1030 * set with $wgLanguageCode.
1032 * Use this if the message should NOT change dependent on the
1033 * language set in the user's preferences. This is the case for
1034 * most text written into logs, as well as link targets (such as
1035 * the name of the copyright policy page). Link titles, on the
1036 * other hand, should be shown in the UI language.
1038 * Note that MediaWiki allows users to change the user interface
1039 * language in their preferences, but a single installation
1040 * typically only contains content in one language.
1042 * Be wary of this distinction: If you use wfMsg() where you should
1043 * use wfMsgForContent(), a user of the software may have to
1044 * customize potentially hundreds of messages in
1045 * order to, e.g., fix a link in every possible language.
1047 * @param $key String: lookup key for the message, usually
1048 * defined in languages/Language.php
1051 function wfMsgForContent( $key ) {
1052 global $wgForceUIMsgAsContentMsg;
1053 $args = func_get_args();
1054 array_shift( $args );
1056 if( is_array( $wgForceUIMsgAsContentMsg ) &&
1057 in_array( $key, $wgForceUIMsgAsContentMsg ) )
1059 $forcontent = false;
1061 return wfMsgReal( $key, $args, true, $forcontent );
1065 * Same as above except doesn't transform the message
1067 * @param $key String
1070 function wfMsgForContentNoTrans( $key ) {
1071 global $wgForceUIMsgAsContentMsg;
1072 $args = func_get_args();
1073 array_shift( $args );
1075 if( is_array( $wgForceUIMsgAsContentMsg ) &&
1076 in_array( $key, $wgForceUIMsgAsContentMsg ) )
1078 $forcontent = false;
1080 return wfMsgReal( $key, $args, true, $forcontent, false );
1084 * Really get a message
1086 * @param $key String: key to get.
1088 * @param $useDB Boolean
1089 * @param $forContent Mixed: Language code, or false for user lang, true for content lang.
1090 * @param $transform Boolean: Whether or not to transform the message.
1091 * @return String: the requested message.
1093 function wfMsgReal( $key, $args, $useDB = true, $forContent = false, $transform = true ) {
1094 wfProfileIn( __METHOD__
);
1095 $message = wfMsgGetKey( $key, $useDB, $forContent, $transform );
1096 $message = wfMsgReplaceArgs( $message, $args );
1097 wfProfileOut( __METHOD__
);
1102 * Fetch a message string value, but don't replace any keys yet.
1104 * @param $key String
1105 * @param $useDB Bool
1106 * @param $langCode String: Code of the language to get the message for, or
1107 * behaves as a content language switch if it is a boolean.
1108 * @param $transform Boolean: whether to parse magic words, etc.
1111 function wfMsgGetKey( $key, $useDB = true, $langCode = false, $transform = true ) {
1112 wfRunHooks( 'NormalizeMessageKey', array( &$key, &$useDB, &$langCode, &$transform ) );
1114 $cache = MessageCache
::singleton();
1115 $message = $cache->get( $key, $useDB, $langCode );
1116 if( $message === false ) {
1117 $message = '<' . htmlspecialchars( $key ) . '>';
1118 } elseif ( $transform ) {
1119 $message = $cache->transform( $message );
1125 * Replace message parameter keys on the given formatted output.
1127 * @param $message String
1128 * @param $args Array
1132 function wfMsgReplaceArgs( $message, $args ) {
1133 # Fix windows line-endings
1134 # Some messages are split with explode("\n", $msg)
1135 $message = str_replace( "\r", '', $message );
1137 // Replace arguments
1138 if ( count( $args ) ) {
1139 if ( is_array( $args[0] ) ) {
1140 $args = array_values( $args[0] );
1142 $replacementKeys = array();
1143 foreach( $args as $n => $param ) {
1144 $replacementKeys['$' . ( $n +
1 )] = $param;
1146 $message = strtr( $message, $replacementKeys );
1153 * Return an HTML-escaped version of a message.
1154 * Parameter replacements, if any, are done *after* the HTML-escaping,
1155 * so parameters may contain HTML (eg links or form controls). Be sure
1156 * to pre-escape them if you really do want plaintext, or just wrap
1157 * the whole thing in htmlspecialchars().
1159 * @param $key String
1160 * @param string ... parameters
1163 function wfMsgHtml( $key ) {
1164 $args = func_get_args();
1165 array_shift( $args );
1166 return wfMsgReplaceArgs( htmlspecialchars( wfMsgGetKey( $key ) ), $args );
1170 * Return an HTML version of message
1171 * Parameter replacements, if any, are done *after* parsing the wiki-text message,
1172 * so parameters may contain HTML (eg links or form controls). Be sure
1173 * to pre-escape them if you really do want plaintext, or just wrap
1174 * the whole thing in htmlspecialchars().
1176 * @param $key String
1177 * @param string ... parameters
1180 function wfMsgWikiHtml( $key ) {
1181 $args = func_get_args();
1182 array_shift( $args );
1183 return wfMsgReplaceArgs(
1184 MessageCache
::singleton()->parse( wfMsgGetKey( $key ), null, /* can't be set to false */ true )->getText(),
1189 * Returns message in the requested format
1190 * @param $key String: key of the message
1191 * @param $options Array: processing rules. Can take the following options:
1192 * <i>parse</i>: parses wikitext to HTML
1193 * <i>parseinline</i>: parses wikitext to HTML and removes the surrounding
1194 * p's added by parser or tidy
1195 * <i>escape</i>: filters message through htmlspecialchars
1196 * <i>escapenoentities</i>: same, but allows entity references like   through
1197 * <i>replaceafter</i>: parameters are substituted after parsing or escaping
1198 * <i>parsemag</i>: transform the message using magic phrases
1199 * <i>content</i>: fetch message for content language instead of interface
1200 * Also can accept a single associative argument, of the form 'language' => 'xx':
1201 * <i>language</i>: Language object or language code to fetch message for
1202 * (overriden by <i>content</i>).
1203 * Behavior for conflicting options (e.g., parse+parseinline) is undefined.
1207 function wfMsgExt( $key, $options ) {
1208 $args = func_get_args();
1209 array_shift( $args );
1210 array_shift( $args );
1211 $options = (array)$options;
1213 foreach( $options as $arrayKey => $option ) {
1214 if( !preg_match( '/^[0-9]+|language$/', $arrayKey ) ) {
1215 # An unknown index, neither numeric nor "language"
1216 wfWarn( "wfMsgExt called with incorrect parameter key $arrayKey", 1, E_USER_WARNING
);
1217 } elseif( preg_match( '/^[0-9]+$/', $arrayKey ) && !in_array( $option,
1218 array( 'parse', 'parseinline', 'escape', 'escapenoentities',
1219 'replaceafter', 'parsemag', 'content' ) ) ) {
1220 # A numeric index with unknown value
1221 wfWarn( "wfMsgExt called with incorrect parameter $option", 1, E_USER_WARNING
);
1225 if( in_array( 'content', $options, true ) ) {
1228 $langCodeObj = null;
1229 } elseif( array_key_exists( 'language', $options ) ) {
1230 $forContent = false;
1231 $langCode = wfGetLangObj( $options['language'] );
1232 $langCodeObj = $langCode;
1234 $forContent = false;
1236 $langCodeObj = null;
1239 $string = wfMsgGetKey( $key, /*DB*/true, $langCode, /*Transform*/false );
1241 if( !in_array( 'replaceafter', $options, true ) ) {
1242 $string = wfMsgReplaceArgs( $string, $args );
1245 $messageCache = MessageCache
::singleton();
1246 if( in_array( 'parse', $options, true ) ) {
1247 $string = $messageCache->parse( $string, null, true, !$forContent, $langCodeObj )->getText();
1248 } elseif ( in_array( 'parseinline', $options, true ) ) {
1249 $string = $messageCache->parse( $string, null, true, !$forContent, $langCodeObj )->getText();
1251 if( preg_match( '/^<p>(.*)\n?<\/p>\n?$/sU', $string, $m ) ) {
1254 } elseif ( in_array( 'parsemag', $options, true ) ) {
1255 $string = $messageCache->transform( $string,
1256 !$forContent, $langCodeObj );
1259 if ( in_array( 'escape', $options, true ) ) {
1260 $string = htmlspecialchars ( $string );
1261 } elseif ( in_array( 'escapenoentities', $options, true ) ) {
1262 $string = Sanitizer
::escapeHtmlAllowEntities( $string );
1265 if( in_array( 'replaceafter', $options, true ) ) {
1266 $string = wfMsgReplaceArgs( $string, $args );
1273 * Since wfMsg() and co suck, they don't return false if the message key they
1274 * looked up didn't exist but a XHTML string, this function checks for the
1275 * nonexistance of messages by checking the MessageCache::get() result directly.
1277 * @param $key String: the message key looked up
1278 * @return Boolean True if the message *doesn't* exist.
1280 function wfEmptyMsg( $key ) {
1281 return MessageCache
::singleton()->get( $key, /*useDB*/true, /*content*/false ) === false;
1285 * Throw a debugging exception. This function previously once exited the process,
1286 * but now throws an exception instead, with similar results.
1288 * @param $msg String: message shown when dieing.
1290 function wfDebugDieBacktrace( $msg = '' ) {
1291 throw new MWException( $msg );
1295 * Fetch server name for use in error reporting etc.
1296 * Use real server name if available, so we know which machine
1297 * in a server farm generated the current page.
1301 function wfHostname() {
1303 if ( is_null( $host ) ) {
1304 if ( function_exists( 'posix_uname' ) ) {
1305 // This function not present on Windows
1306 $uname = posix_uname();
1310 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
1311 $host = $uname['nodename'];
1312 } elseif ( getenv( 'COMPUTERNAME' ) ) {
1313 # Windows computer name
1314 $host = getenv( 'COMPUTERNAME' );
1316 # This may be a virtual server.
1317 $host = $_SERVER['SERVER_NAME'];
1324 * Returns a HTML comment with the elapsed time since request.
1325 * This method has no side effects.
1329 function wfReportTime() {
1330 global $wgRequestTime, $wgShowHostnames;
1333 $elapsed = $now - $wgRequestTime;
1335 return $wgShowHostnames
1336 ?
sprintf( '<!-- Served by %s in %01.3f secs. -->', wfHostname(), $elapsed )
1337 : sprintf( '<!-- Served in %01.3f secs. -->', $elapsed );
1341 * Safety wrapper for debug_backtrace().
1343 * With Zend Optimizer 3.2.0 loaded, this causes segfaults under somewhat
1344 * murky circumstances, which may be triggered in part by stub objects
1345 * or other fancy talkin'.
1347 * Will return an empty array if Zend Optimizer is detected or if
1348 * debug_backtrace is disabled, otherwise the output from
1349 * debug_backtrace() (trimmed).
1351 * @return array of backtrace information
1353 function wfDebugBacktrace( $limit = 0 ) {
1354 static $disabled = null;
1356 if( extension_loaded( 'Zend Optimizer' ) ) {
1357 wfDebug( "Zend Optimizer detected; skipping debug_backtrace for safety.\n" );
1361 if ( is_null( $disabled ) ) {
1363 $functions = explode( ',', ini_get( 'disable_functions' ) );
1364 $functions = array_map( 'trim', $functions );
1365 $functions = array_map( 'strtolower', $functions );
1366 if ( in_array( 'debug_backtrace', $functions ) ) {
1367 wfDebug( "debug_backtrace is in disabled_functions\n" );
1375 if ( $limit && version_compare( PHP_VERSION
, '5.4.0', '>=' ) ) {
1376 return array_slice( debug_backtrace( DEBUG_BACKTRACE_PROVIDE_OBJECT
, 1 ), 1 );
1378 return array_slice( debug_backtrace(), 1 );
1383 * Get a debug backtrace as a string
1387 function wfBacktrace() {
1388 global $wgCommandLineMode;
1390 if ( $wgCommandLineMode ) {
1395 $backtrace = wfDebugBacktrace();
1396 foreach( $backtrace as $call ) {
1397 if( isset( $call['file'] ) ) {
1398 $f = explode( DIRECTORY_SEPARATOR
, $call['file'] );
1399 $file = $f[count( $f ) - 1];
1403 if( isset( $call['line'] ) ) {
1404 $line = $call['line'];
1408 if ( $wgCommandLineMode ) {
1409 $msg .= "$file line $line calls ";
1411 $msg .= '<li>' . $file . ' line ' . $line . ' calls ';
1413 if( !empty( $call['class'] ) ) {
1414 $msg .= $call['class'] . $call['type'];
1416 $msg .= $call['function'] . '()';
1418 if ( $wgCommandLineMode ) {
1424 if ( $wgCommandLineMode ) {
1434 * Get the name of the function which called this function
1437 * @return Bool|string
1439 function wfGetCaller( $level = 2 ) {
1440 $backtrace = wfDebugBacktrace( $level );
1441 if ( isset( $backtrace[$level] ) ) {
1442 return wfFormatStackFrame( $backtrace[$level] );
1444 $caller = 'unknown';
1450 * Return a string consisting of callers in the stack. Useful sometimes
1451 * for profiling specific points.
1453 * @param $limit The maximum depth of the stack frame to return, or false for
1457 function wfGetAllCallers( $limit = 3 ) {
1458 $trace = array_reverse( wfDebugBacktrace() );
1459 if ( !$limit ||
$limit > count( $trace ) - 1 ) {
1460 $limit = count( $trace ) - 1;
1462 $trace = array_slice( $trace, -$limit - 1, $limit );
1463 return implode( '/', array_map( 'wfFormatStackFrame', $trace ) );
1467 * Return a string representation of frame
1469 * @param $frame Array
1472 function wfFormatStackFrame( $frame ) {
1473 return isset( $frame['class'] ) ?
1474 $frame['class'] . '::' . $frame['function'] :
1479 /* Some generic result counters, pulled out of SearchEngine */
1485 * @param $offset Int
1489 function wfShowingResults( $offset, $limit ) {
1493 array( 'parseinline' ),
1494 $wgLang->formatNum( $limit ),
1495 $wgLang->formatNum( $offset +
1 )
1500 * Generate (prev x| next x) (20|50|100...) type links for paging
1502 * @param $offset String
1503 * @param $limit Integer
1504 * @param $link String
1505 * @param $query String: optional URL query parameter string
1506 * @param $atend Bool: optional param for specified if this is the last page
1509 function wfViewPrevNext( $offset, $limit, $link, $query = '', $atend = false ) {
1511 $fmtLimit = $wgLang->formatNum( $limit );
1512 // @todo FIXME: Why on earth this needs one message for the text and another one for tooltip?
1513 # Get prev/next link display text
1514 $prev = wfMsgExt( 'prevn', array( 'parsemag', 'escape' ), $fmtLimit );
1515 $next = wfMsgExt( 'nextn', array( 'parsemag', 'escape' ), $fmtLimit );
1516 # Get prev/next link title text
1517 $pTitle = wfMsgExt( 'prevn-title', array( 'parsemag', 'escape' ), $fmtLimit );
1518 $nTitle = wfMsgExt( 'nextn-title', array( 'parsemag', 'escape' ), $fmtLimit );
1519 # Fetch the title object
1520 if( is_object( $link ) ) {
1523 $title = Title
::newFromText( $link );
1524 if( is_null( $title ) ) {
1528 # Make 'previous' link
1529 if( 0 != $offset ) {
1530 $po = $offset - $limit;
1531 $po = max( $po, 0 );
1532 $q = "limit={$limit}&offset={$po}";
1533 if( $query != '' ) {
1536 $plink = '<a href="' . $title->escapeLocalURL( $q ) . "\" title=\"{$pTitle}\" class=\"mw-prevlink\">{$prev}</a>";
1541 $no = $offset +
$limit;
1542 $q = "limit={$limit}&offset={$no}";
1543 if( $query != '' ) {
1549 $nlink = '<a href="' . $title->escapeLocalURL( $q ) . "\" title=\"{$nTitle}\" class=\"mw-nextlink\">{$next}</a>";
1551 # Make links to set number of items per page
1552 $nums = $wgLang->pipeList( array(
1553 wfNumLink( $offset, 20, $title, $query ),
1554 wfNumLink( $offset, 50, $title, $query ),
1555 wfNumLink( $offset, 100, $title, $query ),
1556 wfNumLink( $offset, 250, $title, $query ),
1557 wfNumLink( $offset, 500, $title, $query )
1559 return wfMsgHtml( 'viewprevnext', $plink, $nlink, $nums );
1563 * Generate links for (20|50|100...) items-per-page links
1565 * @param $offset String
1566 * @param $limit Integer
1567 * @param $title Title
1568 * @param $query String: optional URL query parameter string
1570 function wfNumLink( $offset, $limit, $title, $query = '' ) {
1572 if( $query == '' ) {
1577 $q .= "limit={$limit}&offset={$offset}";
1578 $fmtLimit = $wgLang->formatNum( $limit );
1579 $lTitle = wfMsgExt( 'shown-title', array( 'parsemag', 'escape' ), $limit );
1580 $s = '<a href="' . $title->escapeLocalURL( $q ) . "\" title=\"{$lTitle}\" class=\"mw-numlink\">{$fmtLimit}</a>";
1586 * @todo FIXME: We may want to blacklist some broken browsers
1588 * @param $force Bool
1589 * @return bool Whereas client accept gzip compression
1591 function wfClientAcceptsGzip( $force = false ) {
1592 static $result = null;
1593 if ( $result === null ||
$force ) {
1595 if( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) {
1596 # @todo FIXME: We may want to blacklist some broken browsers
1599 '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
1600 $_SERVER['HTTP_ACCEPT_ENCODING'],
1604 if( isset( $m[2] ) && ( $m[1] == 'q' ) && ( $m[2] == 0 ) ) {
1608 wfDebug( " accepts gzip\n" );
1617 * Obtain the offset and limit values from the request string;
1618 * used in special pages
1620 * @param $deflimit Int default limit if none supplied
1621 * @param $optionname String Name of a user preference to check against
1625 function wfCheckLimits( $deflimit = 50, $optionname = 'rclimit' ) {
1627 return $wgRequest->getLimitOffset( $deflimit, $optionname );
1631 * Escapes the given text so that it may be output using addWikiText()
1632 * without any linking, formatting, etc. making its way through. This
1633 * is achieved by substituting certain characters with HTML entities.
1634 * As required by the callers, <nowiki> is not used.
1636 * @param $text String: text to be escaped
1639 function wfEscapeWikiText( $text ) {
1640 $text = strtr( "\n$text", array(
1641 '"' => '"', '&' => '&', "'" => ''', '<' => '<',
1642 '=' => '=', '>' => '>', '[' => '[', ']' => ']',
1643 '{' => '{', '|' => '|', '}' => '}',
1644 "\n#" => "\n#", "\n*" => "\n*",
1645 "\n:" => "\n:", "\n;" => "\n;",
1646 '://' => '://', 'ISBN ' => 'ISBN ', 'RFC ' => 'RFC ',
1648 return substr( $text, 1 );
1652 * Get the current unix timetstamp with microseconds. Useful for profiling
1656 return microtime( true );
1660 * Sets dest to source and returns the original value of dest
1661 * If source is NULL, it just returns the value, it doesn't set the variable
1662 * If force is true, it will set the value even if source is NULL
1664 * @param $dest Mixed
1665 * @param $source Mixed
1666 * @param $force Bool
1669 function wfSetVar( &$dest, $source, $force = false ) {
1671 if ( !is_null( $source ) ||
$force ) {
1678 * As for wfSetVar except setting a bit
1682 * @param $state Bool
1684 function wfSetBit( &$dest, $bit, $state = true ) {
1685 $temp = (bool)( $dest & $bit );
1686 if ( !is_null( $state ) ) {
1697 * Windows-compatible version of escapeshellarg()
1698 * Windows doesn't recognise single-quotes in the shell, but the escapeshellarg()
1699 * function puts single quotes in regardless of OS.
1701 * Also fixes the locale problems on Linux in PHP 5.2.6+ (bug backported to
1702 * earlier distro releases of PHP)
1707 function wfEscapeShellArg( ) {
1708 wfInitShellLocale();
1710 $args = func_get_args();
1713 foreach ( $args as $arg ) {
1720 if ( wfIsWindows() ) {
1721 // Escaping for an MSVC-style command line parser and CMD.EXE
1723 // * http://web.archive.org/web/20020708081031/http://mailman.lyra.org/pipermail/scite-interest/2002-March/000436.html
1724 // * http://technet.microsoft.com/en-us/library/cc723564.aspx
1727 // Double the backslashes before any double quotes. Escape the double quotes.
1728 $tokens = preg_split( '/(\\\\*")/', $arg, -1, PREG_SPLIT_DELIM_CAPTURE
);
1731 foreach ( $tokens as $token ) {
1732 if ( $iteration %
2 == 1 ) {
1733 // Delimiter, a double quote preceded by zero or more slashes
1734 $arg .= str_replace( '\\', '\\\\', substr( $token, 0, -1 ) ) . '\\"';
1735 } elseif ( $iteration %
4 == 2 ) {
1736 // ^ in $token will be outside quotes, need to be escaped
1737 $arg .= str_replace( '^', '^^', $token );
1738 } else { // $iteration % 4 == 0
1739 // ^ in $token will appear inside double quotes, so leave as is
1744 // Double the backslashes before the end of the string, because
1745 // we will soon add a quote
1747 if ( preg_match( '/^(.*?)(\\\\+)$/', $arg, $m ) ) {
1748 $arg = $m[1] . str_replace( '\\', '\\\\', $m[2] );
1751 // Add surrounding quotes
1752 $retVal .= '"' . $arg . '"';
1754 $retVal .= escapeshellarg( $arg );
1761 * wfMerge attempts to merge differences between three texts.
1762 * Returns true for a clean merge and false for failure or a conflict.
1764 * @param $old String
1765 * @param $mine String
1766 * @param $yours String
1767 * @param $result String
1770 function wfMerge( $old, $mine, $yours, &$result ) {
1773 # This check may also protect against code injection in
1774 # case of broken installations.
1775 wfSuppressWarnings();
1776 $haveDiff3 = $wgDiff3 && file_exists( $wgDiff3 );
1777 wfRestoreWarnings();
1780 wfDebug( "diff3 not found\n" );
1784 # Make temporary files
1786 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
1787 $mytextFile = fopen( $mytextName = tempnam( $td, 'merge-mine-' ), 'w' );
1788 $yourtextFile = fopen( $yourtextName = tempnam( $td, 'merge-your-' ), 'w' );
1790 fwrite( $oldtextFile, $old );
1791 fclose( $oldtextFile );
1792 fwrite( $mytextFile, $mine );
1793 fclose( $mytextFile );
1794 fwrite( $yourtextFile, $yours );
1795 fclose( $yourtextFile );
1797 # Check for a conflict
1798 $cmd = $wgDiff3 . ' -a --overlap-only ' .
1799 wfEscapeShellArg( $mytextName ) . ' ' .
1800 wfEscapeShellArg( $oldtextName ) . ' ' .
1801 wfEscapeShellArg( $yourtextName );
1802 $handle = popen( $cmd, 'r' );
1804 if( fgets( $handle, 1024 ) ) {
1812 $cmd = $wgDiff3 . ' -a -e --merge ' .
1813 wfEscapeShellArg( $mytextName, $oldtextName, $yourtextName );
1814 $handle = popen( $cmd, 'r' );
1817 $data = fread( $handle, 8192 );
1818 if ( strlen( $data ) == 0 ) {
1824 unlink( $mytextName );
1825 unlink( $oldtextName );
1826 unlink( $yourtextName );
1828 if ( $result === '' && $old !== '' && !$conflict ) {
1829 wfDebug( "Unexpected null result from diff3. Command: $cmd\n" );
1836 * Returns unified plain-text diff of two texts.
1837 * Useful for machine processing of diffs.
1839 * @param $before String: the text before the changes.
1840 * @param $after String: the text after the changes.
1841 * @param $params String: command-line options for the diff command.
1842 * @return String: unified diff of $before and $after
1844 function wfDiff( $before, $after, $params = '-u' ) {
1845 if ( $before == $after ) {
1850 wfSuppressWarnings();
1851 $haveDiff = $wgDiff && file_exists( $wgDiff );
1852 wfRestoreWarnings();
1854 # This check may also protect against code injection in
1855 # case of broken installations.
1857 wfDebug( "diff executable not found\n" );
1858 $diffs = new Diff( explode( "\n", $before ), explode( "\n", $after ) );
1859 $format = new UnifiedDiffFormatter();
1860 return $format->format( $diffs );
1863 # Make temporary files
1865 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
1866 $newtextFile = fopen( $newtextName = tempnam( $td, 'merge-your-' ), 'w' );
1868 fwrite( $oldtextFile, $before );
1869 fclose( $oldtextFile );
1870 fwrite( $newtextFile, $after );
1871 fclose( $newtextFile );
1873 // Get the diff of the two files
1874 $cmd = "$wgDiff " . $params . ' ' . wfEscapeShellArg( $oldtextName, $newtextName );
1876 $h = popen( $cmd, 'r' );
1881 $data = fread( $h, 8192 );
1882 if ( strlen( $data ) == 0 ) {
1890 unlink( $oldtextName );
1891 unlink( $newtextName );
1893 // Kill the --- and +++ lines. They're not useful.
1894 $diff_lines = explode( "\n", $diff );
1895 if ( strpos( $diff_lines[0], '---' ) === 0 ) {
1896 unset( $diff_lines[0] );
1898 if ( strpos( $diff_lines[1], '+++' ) === 0 ) {
1899 unset( $diff_lines[1] );
1902 $diff = implode( "\n", $diff_lines );
1908 * A wrapper around the PHP function var_export().
1909 * Either print it or add it to the regular output ($wgOut).
1911 * @param $var A PHP variable to dump.
1913 function wfVarDump( $var ) {
1915 $s = str_replace( "\n", "<br />\n", var_export( $var, true ) . "\n" );
1916 if ( headers_sent() ||
!isset( $wgOut ) ||
!is_object( $wgOut ) ) {
1919 $wgOut->addHTML( $s );
1924 * Provide a simple HTTP error.
1926 * @param $code Int|String
1927 * @param $label String
1928 * @param $desc String
1930 function wfHttpError( $code, $label, $desc ) {
1933 header( "HTTP/1.0 $code $label" );
1934 header( "Status: $code $label" );
1935 $wgOut->sendCacheControl();
1937 header( 'Content-type: text/html; charset=utf-8' );
1938 print "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">".
1939 '<html><head><title>' .
1940 htmlspecialchars( $label ) .
1941 '</title></head><body><h1>' .
1942 htmlspecialchars( $label ) .
1944 nl2br( htmlspecialchars( $desc ) ) .
1945 "</p></body></html>\n";
1949 * Clear away any user-level output buffers, discarding contents.
1951 * Suitable for 'starting afresh', for instance when streaming
1952 * relatively large amounts of data without buffering, or wanting to
1953 * output image files without ob_gzhandler's compression.
1955 * The optional $resetGzipEncoding parameter controls suppression of
1956 * the Content-Encoding header sent by ob_gzhandler; by default it
1957 * is left. See comments for wfClearOutputBuffers() for why it would
1960 * Note that some PHP configuration options may add output buffer
1961 * layers which cannot be removed; these are left in place.
1963 * @param $resetGzipEncoding Bool
1965 function wfResetOutputBuffers( $resetGzipEncoding = true ) {
1966 if( $resetGzipEncoding ) {
1967 // Suppress Content-Encoding and Content-Length
1968 // headers from 1.10+s wfOutputHandler
1969 global $wgDisableOutputCompression;
1970 $wgDisableOutputCompression = true;
1972 while( $status = ob_get_status() ) {
1973 if( $status['type'] == 0 /* PHP_OUTPUT_HANDLER_INTERNAL */ ) {
1974 // Probably from zlib.output_compression or other
1975 // PHP-internal setting which can't be removed.
1977 // Give up, and hope the result doesn't break
1981 if( !ob_end_clean() ) {
1982 // Could not remove output buffer handler; abort now
1983 // to avoid getting in some kind of infinite loop.
1986 if( $resetGzipEncoding ) {
1987 if( $status['name'] == 'ob_gzhandler' ) {
1988 // Reset the 'Content-Encoding' field set by this handler
1989 // so we can start fresh.
1990 if ( function_exists( 'header_remove' ) ) {
1991 // Available since PHP 5.3.0
1992 header_remove( 'Content-Encoding' );
1994 // We need to provide a valid content-coding. See bug 28069
1995 header( 'Content-Encoding: identity' );
2004 * More legible than passing a 'false' parameter to wfResetOutputBuffers():
2006 * Clear away output buffers, but keep the Content-Encoding header
2007 * produced by ob_gzhandler, if any.
2009 * This should be used for HTTP 304 responses, where you need to
2010 * preserve the Content-Encoding header of the real result, but
2011 * also need to suppress the output of ob_gzhandler to keep to spec
2012 * and avoid breaking Firefox in rare cases where the headers and
2013 * body are broken over two packets.
2015 function wfClearOutputBuffers() {
2016 wfResetOutputBuffers( false );
2020 * Converts an Accept-* header into an array mapping string values to quality
2023 * @param $accept String
2024 * @param $def String default
2027 function wfAcceptToPrefs( $accept, $def = '*/*' ) {
2028 # No arg means accept anything (per HTTP spec)
2030 return array( $def => 1.0 );
2035 $parts = explode( ',', $accept );
2037 foreach( $parts as $part ) {
2038 # @todo FIXME: Doesn't deal with params like 'text/html; level=1'
2039 $values = explode( ';', trim( $part ) );
2041 if ( count( $values ) == 1 ) {
2042 $prefs[$values[0]] = 1.0;
2043 } elseif ( preg_match( '/q\s*=\s*(\d*\.\d+)/', $values[1], $match ) ) {
2044 $prefs[$values[0]] = floatval( $match[1] );
2052 * Checks if a given MIME type matches any of the keys in the given
2053 * array. Basic wildcards are accepted in the array keys.
2055 * Returns the matching MIME type (or wildcard) if a match, otherwise
2058 * @param $type String
2059 * @param $avail Array
2063 function mimeTypeMatch( $type, $avail ) {
2064 if( array_key_exists( $type, $avail ) ) {
2067 $parts = explode( '/', $type );
2068 if( array_key_exists( $parts[0] . '/*', $avail ) ) {
2069 return $parts[0] . '/*';
2070 } elseif( array_key_exists( '*/*', $avail ) ) {
2079 * Returns the 'best' match between a client's requested internet media types
2080 * and the server's list of available types. Each list should be an associative
2081 * array of type to preference (preference is a float between 0.0 and 1.0).
2082 * Wildcards in the types are acceptable.
2084 * @param $cprefs Array: client's acceptable type list
2085 * @param $sprefs Array: server's offered types
2088 * @todo FIXME: Doesn't handle params like 'text/plain; charset=UTF-8'
2089 * XXX: generalize to negotiate other stuff
2091 function wfNegotiateType( $cprefs, $sprefs ) {
2094 foreach( array_keys($sprefs) as $type ) {
2095 $parts = explode( '/', $type );
2096 if( $parts[1] != '*' ) {
2097 $ckey = mimeTypeMatch( $type, $cprefs );
2099 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
2104 foreach( array_keys( $cprefs ) as $type ) {
2105 $parts = explode( '/', $type );
2106 if( $parts[1] != '*' && !array_key_exists( $type, $sprefs ) ) {
2107 $skey = mimeTypeMatch( $type, $sprefs );
2109 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
2117 foreach( array_keys( $combine ) as $type ) {
2118 if( $combine[$type] > $bestq ) {
2120 $bestq = $combine[$type];
2128 * Reference-counted warning suppression
2132 function wfSuppressWarnings( $end = false ) {
2133 static $suppressCount = 0;
2134 static $originalLevel = false;
2137 if ( $suppressCount ) {
2139 if ( !$suppressCount ) {
2140 error_reporting( $originalLevel );
2144 if ( !$suppressCount ) {
2145 // E_DEPRECATED is undefined in PHP 5.2
2146 if( !defined( 'E_DEPRECATED' ) ){
2147 define( 'E_DEPRECATED', 8192 );
2149 $originalLevel = error_reporting( E_ALL
& ~
( E_WARNING | E_NOTICE | E_USER_WARNING | E_USER_NOTICE | E_DEPRECATED
) );
2156 * Restore error level to previous value
2158 function wfRestoreWarnings() {
2159 wfSuppressWarnings( true );
2162 # Autodetect, convert and provide timestamps of various types
2165 * Unix time - the number of seconds since 1970-01-01 00:00:00 UTC
2167 define( 'TS_UNIX', 0 );
2170 * MediaWiki concatenated string timestamp (YYYYMMDDHHMMSS)
2172 define( 'TS_MW', 1 );
2175 * MySQL DATETIME (YYYY-MM-DD HH:MM:SS)
2177 define( 'TS_DB', 2 );
2180 * RFC 2822 format, for E-mail and HTTP headers
2182 define( 'TS_RFC2822', 3 );
2185 * ISO 8601 format with no timezone: 1986-02-09T20:00:00Z
2187 * This is used by Special:Export
2189 define( 'TS_ISO_8601', 4 );
2192 * An Exif timestamp (YYYY:MM:DD HH:MM:SS)
2194 * @see http://exif.org/Exif2-2.PDF The Exif 2.2 spec, see page 28 for the
2195 * DateTime tag and page 36 for the DateTimeOriginal and
2196 * DateTimeDigitized tags.
2198 define( 'TS_EXIF', 5 );
2201 * Oracle format time.
2203 define( 'TS_ORACLE', 6 );
2206 * Postgres format time.
2208 define( 'TS_POSTGRES', 7 );
2213 define( 'TS_DB2', 8 );
2216 * ISO 8601 basic format with no timezone: 19860209T200000Z. This is used by ResourceLoader
2218 define( 'TS_ISO_8601_BASIC', 9 );
2221 * Get a timestamp string in one of various formats
2223 * @param $outputtype Mixed: A timestamp in one of the supported formats, the
2224 * function will autodetect which format is supplied and act
2226 * @param $ts Mixed: the timestamp to convert or 0 for the current timestamp
2227 * @return Mixed: String / false The same date in the format specified in $outputtype or false
2229 function wfTimestamp( $outputtype = TS_UNIX
, $ts = 0 ) {
2234 if ( !$ts ) { // We want to catch 0, '', null... but not date strings starting with a letter.
2237 } elseif ( preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)$/D', $ts, $da ) ) {
2239 } elseif ( preg_match( '/^(\d{4}):(\d\d):(\d\d) (\d\d):(\d\d):(\d\d)$/D', $ts, $da ) ) {
2241 } elseif ( preg_match( '/^(\d{4})(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)$/D', $ts, $da ) ) {
2243 } elseif ( preg_match( '/^-?\d{1,13}$/D', $ts ) ) {
2246 $strtime = "@$ts"; // Undocumented?
2247 } elseif ( preg_match( '/^\d{2}-\d{2}-\d{4} \d{2}:\d{2}:\d{2}.\d{6}$/', $ts ) ) {
2248 # TS_ORACLE // session altered to DD-MM-YYYY HH24:MI:SS.FF6
2249 $strtime = preg_replace( '/(\d\d)\.(\d\d)\.(\d\d)(\.(\d+))?/', "$1:$2:$3",
2250 str_replace( '+00:00', 'UTC', $ts ) );
2251 } elseif ( preg_match( '/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(?:\.*\d*)?Z$/', $ts, $da ) ) {
2253 } elseif ( preg_match( '/^(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})(\d{2})(?:\.*\d*)?Z$/', $ts, $da ) ) {
2255 } elseif ( preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)\.*\d*[\+\- ](\d\d)$/', $ts, $da ) ) {
2257 } elseif ( preg_match( '/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)\.*\d* GMT$/', $ts, $da ) ) {
2259 } elseif (preg_match('/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)\.\d\d\d$/',$ts,$da)) {
2261 } elseif ( preg_match( '/^[ \t\r\n]*([A-Z][a-z]{2},[ \t\r\n]*)?' . # Day of week
2262 '\d\d?[ \t\r\n]*[A-Z][a-z]{2}[ \t\r\n]*\d{2}(?:\d{2})?' . # dd Mon yyyy
2263 '[ \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
2264 # TS_RFC2822, accepting a trailing comment. See http://www.squid-cache.org/mail-archive/squid-users/200307/0122.html / r77171
2265 # The regex is a superset of rfc2822 for readability
2266 $strtime = strtok( $ts, ';' );
2267 } 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 ) ) {
2270 } elseif ( preg_match( '/^[A-Z][a-z]{2} [A-Z][a-z]{2} +\d{1,2} \d\d:\d\d:\d\d \d{4}/', $ts ) ) {
2275 wfDebug("wfTimestamp() fed bogus time value: TYPE=$outputtype; VALUE=$ts\n");
2280 static $formats = array(
2283 TS_DB
=> 'Y-m-d H:i:s',
2284 TS_ISO_8601
=> 'Y-m-d\TH:i:s\Z',
2285 TS_ISO_8601_BASIC
=> 'Ymd\THis\Z',
2286 TS_EXIF
=> 'Y:m:d H:i:s', // This shouldn't ever be used, but is included for completeness
2287 TS_RFC2822
=> 'D, d M Y H:i:s',
2288 TS_ORACLE
=> 'd-m-Y H:i:s.000000', // Was 'd-M-y h.i.s A' . ' +00:00' before r51500
2289 TS_POSTGRES
=> 'Y-m-d H:i:s',
2290 TS_DB2
=> 'Y-m-d H:i:s',
2293 if ( !isset( $formats[$outputtype] ) ) {
2294 throw new MWException( 'wfTimestamp() called with illegal output type.' );
2297 if ( function_exists( "date_create" ) ) {
2298 if ( count( $da ) ) {
2299 $ds = sprintf("%04d-%02d-%02dT%02d:%02d:%02d.00+00:00",
2300 (int)$da[1], (int)$da[2], (int)$da[3],
2301 (int)$da[4], (int)$da[5], (int)$da[6]);
2303 $d = date_create( $ds, new DateTimeZone( 'GMT' ) );
2304 } elseif ( $strtime ) {
2305 $d = date_create( $strtime, new DateTimeZone( 'GMT' ) );
2311 wfDebug("wfTimestamp() fed bogus time value: $outputtype; $ts\n");
2315 $output = $d->format( $formats[$outputtype] );
2317 if ( count( $da ) ) {
2318 // Warning! gmmktime() acts oddly if the month or day is set to 0
2319 // We may want to handle that explicitly at some point
2320 $uts = gmmktime( (int)$da[4], (int)$da[5], (int)$da[6],
2321 (int)$da[2], (int)$da[3], (int)$da[1] );
2322 } elseif ( $strtime ) {
2323 $uts = strtotime( $strtime );
2326 if ( $uts === false ) {
2327 wfDebug("wfTimestamp() can't parse the timestamp (non 32-bit time? Update php): $outputtype; $ts\n");
2331 if ( TS_UNIX
== $outputtype ) {
2334 $output = gmdate( $formats[$outputtype], $uts );
2337 if ( ( $outputtype == TS_RFC2822
) ||
( $outputtype == TS_POSTGRES
) ) {
2345 * Return a formatted timestamp, or null if input is null.
2346 * For dealing with nullable timestamp columns in the database.
2348 * @param $outputtype Integer
2352 function wfTimestampOrNull( $outputtype = TS_UNIX
, $ts = null ) {
2353 if( is_null( $ts ) ) {
2356 return wfTimestamp( $outputtype, $ts );
2361 * Convenience function; returns MediaWiki timestamp for the present time.
2365 function wfTimestampNow() {
2367 return wfTimestamp( TS_MW
, time() );
2371 * Check if the operating system is Windows
2373 * @return Bool: true if it's Windows, False otherwise.
2375 function wfIsWindows() {
2376 static $isWindows = null;
2377 if ( $isWindows === null ) {
2378 $isWindows = substr( php_uname(), 0, 7 ) == 'Windows';
2384 * Check if we are running under HipHop
2388 function wfIsHipHop() {
2389 return function_exists( 'hphp_thread_set_warmup_enabled' );
2393 * Swap two variables
2398 function swap( &$x, &$y ) {
2405 * Tries to get the system directory for temporary files. The TMPDIR, TMP, and
2406 * TEMP environment variables are then checked in sequence, and if none are set
2407 * try sys_get_temp_dir() for PHP >= 5.2.1. All else fails, return /tmp for Unix
2408 * or C:\Windows\Temp for Windows and hope for the best.
2409 * It is common to call it with tempnam().
2411 * NOTE: When possible, use instead the tmpfile() function to create
2412 * temporary files to avoid race conditions on file creation, etc.
2416 function wfTempDir() {
2417 foreach( array( 'TMPDIR', 'TMP', 'TEMP' ) as $var ) {
2418 $tmp = getenv( $var );
2419 if( $tmp && file_exists( $tmp ) && is_dir( $tmp ) && is_writable( $tmp ) ) {
2423 if( function_exists( 'sys_get_temp_dir' ) ) {
2424 return sys_get_temp_dir();
2427 return wfIsWindows() ?
'C:\Windows\Temp' : '/tmp';
2431 * Make directory, and make all parent directories if they don't exist
2433 * @param $dir String: full path to directory to create
2434 * @param $mode Integer: chmod value to use, default is $wgDirectoryMode
2435 * @param $caller String: optional caller param for debugging.
2438 function wfMkdirParents( $dir, $mode = null, $caller = null ) {
2439 global $wgDirectoryMode;
2441 if ( !is_null( $caller ) ) {
2442 wfDebug( "$caller: called wfMkdirParents($dir)" );
2445 if( strval( $dir ) === '' ||
file_exists( $dir ) ) {
2449 $dir = str_replace( array( '\\', '/' ), DIRECTORY_SEPARATOR
, $dir );
2451 if ( is_null( $mode ) ) {
2452 $mode = $wgDirectoryMode;
2455 // Turn off the normal warning, we're doing our own below
2456 wfSuppressWarnings();
2457 $ok = mkdir( $dir, $mode, true ); // PHP5 <3
2458 wfRestoreWarnings();
2461 // PHP doesn't report the path in its warning message, so add our own to aid in diagnosis.
2462 trigger_error( __FUNCTION__
. ": failed to mkdir \"$dir\" mode $mode", E_USER_WARNING
);
2468 * Increment a statistics counter
2470 * @param $key String
2473 function wfIncrStats( $key, $count = 1 ) {
2474 global $wgStatsMethod;
2476 $count = intval( $count );
2478 if( $wgStatsMethod == 'udp' ) {
2479 global $wgUDPProfilerHost, $wgUDPProfilerPort, $wgDBname, $wgAggregateStatsID;
2482 $id = $wgAggregateStatsID !== false ?
$wgAggregateStatsID : $wgDBname;
2485 $socket = socket_create( AF_INET
, SOCK_DGRAM
, SOL_UDP
);
2486 $statline = "stats/{$id} - {$count} 1 1 1 1 -total\n";
2490 strlen( $statline ),
2496 $statline = "stats/{$id} - {$count} 1 1 1 1 {$key}\n";
2497 wfSuppressWarnings();
2501 strlen( $statline ),
2506 wfRestoreWarnings();
2507 } elseif( $wgStatsMethod == 'cache' ) {
2509 $key = wfMemcKey( 'stats', $key );
2510 if ( is_null( $wgMemc->incr( $key, $count ) ) ) {
2511 $wgMemc->add( $key, $count );
2519 * @param $nr Mixed: the number to format
2520 * @param $acc Integer: the number of digits after the decimal point, default 2
2521 * @param $round Boolean: whether or not to round the value, default true
2524 function wfPercent( $nr, $acc = 2, $round = true ) {
2525 $ret = sprintf( "%.${acc}f", $nr );
2526 return $round ?
round( $ret, $acc ) . '%' : "$ret%";
2530 * Find out whether or not a mixed variable exists in a string
2532 * @param $needle String
2533 * @param $str String
2534 * @param $insensitive Boolean
2537 function in_string( $needle, $str, $insensitive = false ) {
2539 if( $insensitive ) $func = 'stripos';
2541 return $func( $str, $needle ) !== false;
2545 * Make a list item, used by various special pages
2547 * @param $page String Page link
2548 * @param $details String Text between brackets
2549 * @param $oppositedm Boolean Add the direction mark opposite to your
2550 * language, to display text properly
2553 function wfSpecialList( $page, $details, $oppositedm = true ) {
2555 $dirmark = ( $oppositedm ?
$wgLang->getDirMark( true ) : '' ) .
2556 $wgLang->getDirMark();
2557 $details = $details ?
$dirmark . " ($details)" : '';
2558 return $page . $details;
2562 * Safety wrapper around ini_get() for boolean settings.
2563 * The values returned from ini_get() are pre-normalized for settings
2564 * set via php.ini or php_flag/php_admin_flag... but *not*
2565 * for those set via php_value/php_admin_value.
2567 * It's fairly common for people to use php_value instead of php_flag,
2568 * which can leave you with an 'off' setting giving a false positive
2569 * for code that just takes the ini_get() return value as a boolean.
2571 * To make things extra interesting, setting via php_value accepts
2572 * "true" and "yes" as true, but php.ini and php_flag consider them false. :)
2573 * Unrecognized values go false... again opposite PHP's own coercion
2574 * from string to bool.
2576 * Luckily, 'properly' set settings will always come back as '0' or '1',
2577 * so we only have to worry about them and the 'improper' settings.
2579 * I frickin' hate PHP... :P
2581 * @param $setting String
2584 function wfIniGetBool( $setting ) {
2585 $val = ini_get( $setting );
2586 // 'on' and 'true' can't have whitespace around them, but '1' can.
2587 return strtolower( $val ) == 'on'
2588 ||
strtolower( $val ) == 'true'
2589 ||
strtolower( $val ) == 'yes'
2590 ||
preg_match( "/^\s*[+-]?0*[1-9]/", $val ); // approx C atoi() function
2594 * Wrapper function for PHP's dl(). This doesn't work in most situations from
2595 * PHP 5.3 onward, and is usually disabled in shared environments anyway.
2597 * @param $extension String A PHP extension. The file suffix (.so or .dll)
2599 * @param $fileName String Name of the library, if not $extension.suffix
2600 * @return Bool - Whether or not the extension is loaded
2602 function wfDl( $extension, $fileName = null ) {
2603 if( extension_loaded( $extension ) ) {
2608 $sapi = php_sapi_name();
2609 if( version_compare( PHP_VERSION
, '5.3.0', '<' ) ||
2610 $sapi == 'cli' ||
$sapi == 'cgi' ||
$sapi == 'embed' )
2612 $canDl = ( function_exists( 'dl' ) && is_callable( 'dl' )
2613 && wfIniGetBool( 'enable_dl' ) && !wfIniGetBool( 'safe_mode' ) );
2617 $fileName = $fileName ?
$fileName : $extension;
2618 if( wfIsWindows() ) {
2619 $fileName = 'php_' . $fileName;
2621 wfSuppressWarnings();
2622 dl( $fileName . '.' . PHP_SHLIB_SUFFIX
);
2623 wfRestoreWarnings();
2625 return extension_loaded( $extension );
2629 * Execute a shell command, with time and memory limits mirrored from the PHP
2630 * configuration if supported.
2631 * @param $cmd String Command line, properly escaped for shell.
2632 * @param &$retval optional, will receive the program's exit code.
2633 * (non-zero is usually failure)
2634 * @param $environ Array optional environment variables which should be
2635 * added to the executed command environment.
2636 * @return collected stdout as a string (trailing newlines stripped)
2638 function wfShellExec( $cmd, &$retval = null, $environ = array() ) {
2639 global $IP, $wgMaxShellMemory, $wgMaxShellFileSize, $wgMaxShellTime;
2642 if ( is_null( $disabled ) ) {
2644 if( wfIniGetBool( 'safe_mode' ) ) {
2645 wfDebug( "wfShellExec can't run in safe_mode, PHP's exec functions are too broken.\n" );
2646 $disabled = 'safemode';
2648 $functions = explode( ',', ini_get( 'disable_functions' ) );
2649 $functions = array_map( 'trim', $functions );
2650 $functions = array_map( 'strtolower', $functions );
2651 if ( in_array( 'passthru', $functions ) ) {
2652 wfDebug( "passthru is in disabled_functions\n" );
2653 $disabled = 'passthru';
2659 return $disabled == 'safemode' ?
2660 'Unable to run external programs in safe mode.' :
2661 'Unable to run external programs, passthru() is disabled.';
2664 wfInitShellLocale();
2667 foreach( $environ as $k => $v ) {
2668 if ( wfIsWindows() ) {
2669 /* Surrounding a set in quotes (method used by wfEscapeShellArg) makes the quotes themselves
2670 * appear in the environment variable, so we must use carat escaping as documented in
2671 * http://technet.microsoft.com/en-us/library/cc723564.aspx
2672 * Note however that the quote isn't listed there, but is needed, and the parentheses
2673 * are listed there but doesn't appear to need it.
2675 $envcmd .= "set $k=" . preg_replace( '/([&|()<>^"])/', '^\\1', $v ) . '&& ';
2677 /* Assume this is a POSIX shell, thus required to accept variable assignments before the command
2678 * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_09_01
2680 $envcmd .= "$k=" . escapeshellarg( $v ) . ' ';
2683 $cmd = $envcmd . $cmd;
2685 if ( wfIsWindows() ) {
2686 if ( version_compare( PHP_VERSION
, '5.3.0', '<' ) && /* Fixed in 5.3.0 :) */
2687 ( version_compare( PHP_VERSION
, '5.2.1', '>=' ) ||
php_uname( 's' ) == 'Windows NT' ) )
2689 # Hack to work around PHP's flawed invocation of cmd.exe
2690 # http://news.php.net/php.internals/21796
2691 # Windows 9x doesn't accept any kind of quotes
2692 $cmd = '"' . $cmd . '"';
2694 } elseif ( php_uname( 's' ) == 'Linux' ) {
2695 $time = intval( $wgMaxShellTime );
2696 $mem = intval( $wgMaxShellMemory );
2697 $filesize = intval( $wgMaxShellFileSize );
2699 if ( $time > 0 && $mem > 0 ) {
2700 $script = "$IP/bin/ulimit4.sh";
2701 if ( is_executable( $script ) ) {
2702 $cmd = '/bin/bash ' . escapeshellarg( $script ) . " $time $mem $filesize " . escapeshellarg( $cmd );
2706 wfDebug( "wfShellExec: $cmd\n" );
2708 $retval = 1; // error by default?
2710 passthru( $cmd, $retval );
2711 $output = ob_get_contents();
2714 if ( $retval == 127 ) {
2715 wfDebugLog( 'exec', "Possibly missing executable file: $cmd\n" );
2721 * Workaround for http://bugs.php.net/bug.php?id=45132
2722 * escapeshellarg() destroys non-ASCII characters if LANG is not a UTF-8 locale
2724 function wfInitShellLocale() {
2725 static $done = false;
2730 global $wgShellLocale;
2731 if ( !wfIniGetBool( 'safe_mode' ) ) {
2732 putenv( "LC_CTYPE=$wgShellLocale" );
2733 setlocale( LC_CTYPE
, $wgShellLocale );
2738 * This function works like "use VERSION" in Perl, the program will die with a
2739 * backtrace if the current version of PHP is less than the version provided
2741 * This is useful for extensions which due to their nature are not kept in sync
2742 * with releases, and might depend on other versions of PHP than the main code
2744 * Note: PHP might die due to parsing errors in some cases before it ever
2745 * manages to call this function, such is life
2747 * @see perldoc -f use
2749 * @param $req_ver Mixed: the version to check, can be a string, an integer, or
2752 function wfUsePHP( $req_ver ) {
2753 $php_ver = PHP_VERSION
;
2755 if ( version_compare( $php_ver, (string)$req_ver, '<' ) ) {
2756 throw new MWException( "PHP $req_ver required--this is only $php_ver" );
2761 * This function works like "use VERSION" in Perl except it checks the version
2762 * of MediaWiki, the program will die with a backtrace if the current version
2763 * of MediaWiki is less than the version provided.
2765 * This is useful for extensions which due to their nature are not kept in sync
2768 * @see perldoc -f use
2770 * @param $req_ver Mixed: the version to check, can be a string, an integer, or
2773 function wfUseMW( $req_ver ) {
2776 if ( version_compare( $wgVersion, (string)$req_ver, '<' ) ) {
2777 throw new MWException( "MediaWiki $req_ver required--this is only $wgVersion" );
2782 * Return the final portion of a pathname.
2783 * Reimplemented because PHP5's basename() is buggy with multibyte text.
2784 * http://bugs.php.net/bug.php?id=33898
2786 * PHP's basename() only considers '\' a pathchar on Windows and Netware.
2787 * We'll consider it so always, as we don't want \s in our Unix paths either.
2789 * @param $path String
2790 * @param $suffix String: to remove if present
2793 function wfBaseName( $path, $suffix = '' ) {
2794 $encSuffix = ( $suffix == '' )
2796 : ( '(?:' . preg_quote( $suffix, '#' ) . ')?' );
2798 if( preg_match( "#([^/\\\\]*?){$encSuffix}[/\\\\]*$#", $path, $matches ) ) {
2806 * Generate a relative path name to the given file.
2807 * May explode on non-matching case-insensitive paths,
2808 * funky symlinks, etc.
2810 * @param $path String: absolute destination path including target filename
2811 * @param $from String: Absolute source path, directory only
2814 function wfRelativePath( $path, $from ) {
2815 // Normalize mixed input on Windows...
2816 $path = str_replace( '/', DIRECTORY_SEPARATOR
, $path );
2817 $from = str_replace( '/', DIRECTORY_SEPARATOR
, $from );
2819 // Trim trailing slashes -- fix for drive root
2820 $path = rtrim( $path, DIRECTORY_SEPARATOR
);
2821 $from = rtrim( $from, DIRECTORY_SEPARATOR
);
2823 $pieces = explode( DIRECTORY_SEPARATOR
, dirname( $path ) );
2824 $against = explode( DIRECTORY_SEPARATOR
, $from );
2826 if( $pieces[0] !== $against[0] ) {
2827 // Non-matching Windows drive letters?
2828 // Return a full path.
2832 // Trim off common prefix
2833 while( count( $pieces ) && count( $against )
2834 && $pieces[0] == $against[0] ) {
2835 array_shift( $pieces );
2836 array_shift( $against );
2839 // relative dots to bump us to the parent
2840 while( count( $against ) ) {
2841 array_unshift( $pieces, '..' );
2842 array_shift( $against );
2845 array_push( $pieces, wfBaseName( $path ) );
2847 return implode( DIRECTORY_SEPARATOR
, $pieces );
2851 * Do any deferred updates and clear the list
2853 * @param $commit String: set to 'commit' to commit after every update to
2854 * prevent lock contention
2856 function wfDoUpdates( $commit = '' ) {
2857 global $wgDeferredUpdateList;
2859 wfProfileIn( __METHOD__
);
2861 // No need to get master connections in case of empty updates array
2862 if ( !count( $wgDeferredUpdateList ) ) {
2863 wfProfileOut( __METHOD__
);
2867 $doCommit = $commit == 'commit';
2869 $dbw = wfGetDB( DB_MASTER
);
2872 foreach ( $wgDeferredUpdateList as $update ) {
2873 $update->doUpdate();
2875 if ( $doCommit && $dbw->trxLevel() ) {
2880 $wgDeferredUpdateList = array();
2881 wfProfileOut( __METHOD__
);
2885 * Convert an arbitrarily-long digit string from one numeric base
2886 * to another, optionally zero-padding to a minimum column width.
2888 * Supports base 2 through 36; digit values 10-36 are represented
2889 * as lowercase letters a-z. Input is case-insensitive.
2891 * @param $input String: of digits
2892 * @param $sourceBase Integer: 2-36
2893 * @param $destBase Integer: 2-36
2894 * @param $pad Integer: 1 or greater
2895 * @param $lowercase Boolean
2896 * @return String or false on invalid input
2898 function wfBaseConvert( $input, $sourceBase, $destBase, $pad = 1, $lowercase = true ) {
2899 $input = strval( $input );
2900 if( $sourceBase < 2 ||
2905 $sourceBase != intval( $sourceBase ) ||
2906 $destBase != intval( $destBase ) ||
2907 $pad != intval( $pad ) ||
2908 !is_string( $input ) ||
2912 $digitChars = ( $lowercase ) ?
'0123456789abcdefghijklmnopqrstuvwxyz' : '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
2913 $inDigits = array();
2916 // Decode and validate input string
2917 $input = strtolower( $input );
2918 for( $i = 0; $i < strlen( $input ); $i++
) {
2919 $n = strpos( $digitChars, $input[$i] );
2920 if( $n === false ||
$n > $sourceBase ) {
2926 // Iterate over the input, modulo-ing out an output digit
2927 // at a time until input is gone.
2928 while( count( $inDigits ) ) {
2930 $workDigits = array();
2933 foreach( $inDigits as $digit ) {
2934 $work *= $sourceBase;
2937 if( $work < $destBase ) {
2938 // Gonna need to pull another digit.
2939 if( count( $workDigits ) ) {
2940 // Avoid zero-padding; this lets us find
2941 // the end of the input very easily when
2942 // length drops to zero.
2946 // Finally! Actual division!
2947 $workDigits[] = intval( $work / $destBase );
2949 // Isn't it annoying that most programming languages
2950 // don't have a single divide-and-remainder operator,
2951 // even though the CPU implements it that way?
2952 $work = $work %
$destBase;
2956 // All that division leaves us with a remainder,
2957 // which is conveniently our next output digit.
2958 $outChars .= $digitChars[$work];
2961 $inDigits = $workDigits;
2964 while( strlen( $outChars ) < $pad ) {
2968 return strrev( $outChars );
2972 * Create an object with a given name and an array of construct parameters
2974 * @param $name String
2975 * @param $p Array: parameters
2976 * @deprecated since 1.18, warnings in 1.18, removal in 1.20
2978 function wfCreateObject( $name, $p ) {
2979 wfDeprecated( __FUNCTION__
);
2980 return MWFunction
::newObj( $name, $p );
2983 function wfHttpOnlySafe() {
2984 global $wgHttpOnlyBlacklist;
2986 if( isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
2987 foreach( $wgHttpOnlyBlacklist as $regex ) {
2988 if( preg_match( $regex, $_SERVER['HTTP_USER_AGENT'] ) ) {
2998 * Initialise php session
3000 * @param $sessionId Bool
3002 function wfSetupSession( $sessionId = false ) {
3003 global $wgSessionsInMemcached, $wgCookiePath, $wgCookieDomain,
3004 $wgCookieSecure, $wgCookieHttpOnly, $wgSessionHandler;
3005 if( $wgSessionsInMemcached ) {
3006 if ( !defined( 'MW_COMPILED' ) ) {
3008 require_once( "$IP/includes/cache/MemcachedSessions.php" );
3010 session_set_save_handler( 'memsess_open', 'memsess_close', 'memsess_read',
3011 'memsess_write', 'memsess_destroy', 'memsess_gc' );
3013 // It's necessary to register a shutdown function to call session_write_close(),
3014 // because by the time the request shutdown function for the session module is
3015 // called, $wgMemc has already been destroyed. Shutdown functions registered
3016 // this way are called before object destruction.
3017 register_shutdown_function( 'memsess_write_close' );
3018 } elseif( $wgSessionHandler && $wgSessionHandler != ini_get( 'session.save_handler' ) ) {
3019 # Only set this if $wgSessionHandler isn't null and session.save_handler
3020 # hasn't already been set to the desired value (that causes errors)
3021 ini_set( 'session.save_handler', $wgSessionHandler );
3023 $httpOnlySafe = wfHttpOnlySafe() && $wgCookieHttpOnly;
3024 wfDebugLog( 'cookie',
3025 'session_set_cookie_params: "' . implode( '", "',
3031 $httpOnlySafe ) ) . '"' );
3032 session_set_cookie_params( 0, $wgCookiePath, $wgCookieDomain, $wgCookieSecure, $httpOnlySafe );
3033 session_cache_limiter( 'private, must-revalidate' );
3035 session_id( $sessionId );
3037 wfSuppressWarnings();
3039 wfRestoreWarnings();
3043 * Get an object from the precompiled serialized directory
3045 * @param $name String
3046 * @return Mixed: the variable on success, false on failure
3048 function wfGetPrecompiledData( $name ) {
3051 $file = "$IP/serialized/$name";
3052 if ( file_exists( $file ) ) {
3053 $blob = file_get_contents( $file );
3055 return unserialize( $blob );
3067 function wfMemcKey( /*... */ ) {
3068 $args = func_get_args();
3069 $key = wfWikiID() . ':' . implode( ':', $args );
3070 $key = str_replace( ' ', '_', $key );
3075 * Get a cache key for a foreign DB
3078 * @param $prefix String
3079 * @param varargs String
3082 function wfForeignMemcKey( $db, $prefix /*, ... */ ) {
3083 $args = array_slice( func_get_args(), 2 );
3085 $key = "$db-$prefix:" . implode( ':', $args );
3087 $key = $db . ':' . implode( ':', $args );
3093 * Get an ASCII string identifying this wiki
3094 * This is used as a prefix in memcached keys
3098 function wfWikiID() {
3099 global $wgDBprefix, $wgDBname;
3100 if ( $wgDBprefix ) {
3101 return "$wgDBname-$wgDBprefix";
3108 * Split a wiki ID into DB name and table prefix
3110 * @param $wiki String
3111 * @param $bits String
3113 function wfSplitWikiID( $wiki ) {
3114 $bits = explode( '-', $wiki, 2 );
3115 if ( count( $bits ) < 2 ) {
3122 * Get a Database object.
3124 * @param $db Integer: index of the connection to get. May be DB_MASTER for the
3125 * master (for write queries), DB_SLAVE for potentially lagged read
3126 * queries, or an integer >= 0 for a particular server.
3128 * @param $groups Mixed: query groups. An array of group names that this query
3129 * belongs to. May contain a single string if the query is only
3132 * @param $wiki String: the wiki ID, or false for the current wiki
3134 * Note: multiple calls to wfGetDB(DB_SLAVE) during the course of one request
3135 * will always return the same object, unless the underlying connection or load
3136 * balancer is manually destroyed.
3138 * Note 2: use $this->getDB() in maintenance scripts that may be invoked by
3139 * updater to ensure that a proper database is being updated.
3141 * @return DatabaseBase
3143 function &wfGetDB( $db, $groups = array(), $wiki = false ) {
3144 return wfGetLB( $wiki )->getConnection( $db, $groups, $wiki );
3148 * Get a load balancer object.
3150 * @param $wiki String: wiki ID, or false for the current wiki
3151 * @return LoadBalancer
3153 function wfGetLB( $wiki = false ) {
3154 return wfGetLBFactory()->getMainLB( $wiki );
3158 * Get the load balancer factory object
3162 function &wfGetLBFactory() {
3163 return LBFactory
::singleton();
3168 * Shortcut for RepoGroup::singleton()->findFile()
3170 * @param $title String or Title object
3171 * @param $options Associative array of options:
3172 * time: requested time for an archived image, or false for the
3173 * current version. An image object will be returned which was
3174 * created at the specified time.
3176 * ignoreRedirect: If true, do not follow file redirects
3178 * private: If true, return restricted (deleted) files if the current
3179 * user is allowed to view them. Otherwise, such files will not
3182 * bypassCache: If true, do not use the process-local cache of File objects
3184 * @return File, or false if the file does not exist
3186 function wfFindFile( $title, $options = array() ) {
3187 return RepoGroup
::singleton()->findFile( $title, $options );
3191 * Get an object referring to a locally registered file.
3192 * Returns a valid placeholder object if the file does not exist.
3194 * @param $title Title or String
3195 * @return File, or null if passed an invalid Title
3197 function wfLocalFile( $title ) {
3198 return RepoGroup
::singleton()->getLocalRepo()->newFile( $title );
3202 * Should low-performance queries be disabled?
3205 * @codeCoverageIgnore
3207 function wfQueriesMustScale() {
3208 global $wgMiserMode;
3210 ||
( SiteStats
::pages() > 100000
3211 && SiteStats
::edits() > 1000000
3212 && SiteStats
::users() > 10000 );
3216 * Get the path to a specified script file, respecting file
3217 * extensions; this is a wrapper around $wgScriptExtension etc.
3219 * @param $script String: script filename, sans extension
3222 function wfScript( $script = 'index' ) {
3223 global $wgScriptPath, $wgScriptExtension;
3224 return "{$wgScriptPath}/{$script}{$wgScriptExtension}";
3228 * Get the script URL.
3230 * @return script URL
3232 function wfGetScriptUrl() {
3233 if( isset( $_SERVER['SCRIPT_NAME'] ) ) {
3235 # as it was called, minus the query string.
3237 # Some sites use Apache rewrite rules to handle subdomains,
3238 # and have PHP set up in a weird way that causes PHP_SELF
3239 # to contain the rewritten URL instead of the one that the
3240 # outside world sees.
3242 # If in this mode, use SCRIPT_URL instead, which mod_rewrite
3243 # provides containing the "before" URL.
3244 return $_SERVER['SCRIPT_NAME'];
3246 return $_SERVER['URL'];
3251 * Convenience function converts boolean values into "true"
3252 * or "false" (string) values
3254 * @param $value Boolean
3257 function wfBoolToStr( $value ) {
3258 return $value ?
'true' : 'false';
3262 * Load an extension messages file
3264 * @deprecated since 1.16, warnings in 1.18, remove in 1.20
3265 * @codeCoverageIgnore
3267 function wfLoadExtensionMessages() {
3268 wfDeprecated( __FUNCTION__
);
3272 * Get a platform-independent path to the null file, e.g. /dev/null
3276 function wfGetNull() {
3277 return wfIsWindows()
3283 * Throws a warning that $function is deprecated
3285 * @param $function String
3288 function wfDeprecated( $function ) {
3289 static $functionsWarned = array();
3290 if ( !isset( $functionsWarned[$function] ) ) {
3291 $functionsWarned[$function] = true;
3292 wfWarn( "Use of $function is deprecated.", 2 );
3297 * Send a warning either to the debug log or in a PHP error depending on
3298 * $wgDevelopmentWarnings
3300 * @param $msg String: message to send
3301 * @param $callerOffset Integer: number of items to go back in the backtrace to
3302 * find the correct caller (1 = function calling wfWarn, ...)
3303 * @param $level Integer: PHP error level; only used when $wgDevelopmentWarnings
3306 function wfWarn( $msg, $callerOffset = 1, $level = E_USER_NOTICE
) {
3307 global $wgDevelopmentWarnings;
3309 $callers = wfDebugBacktrace();
3310 if ( isset( $callers[$callerOffset +
1] ) ) {
3311 $callerfunc = $callers[$callerOffset +
1];
3312 $callerfile = $callers[$callerOffset];
3313 if ( isset( $callerfile['file'] ) && isset( $callerfile['line'] ) ) {
3314 $file = $callerfile['file'] . ' at line ' . $callerfile['line'];
3316 $file = '(internal function)';
3319 if ( isset( $callerfunc['class'] ) ) {
3320 $func .= $callerfunc['class'] . '::';
3322 if ( isset( $callerfunc['function'] ) ) {
3323 $func .= $callerfunc['function'];
3325 $msg .= " [Called from $func in $file]";
3328 if ( $wgDevelopmentWarnings ) {
3329 trigger_error( $msg, $level );
3331 wfDebug( "$msg\n" );
3336 * Modern version of wfWaitForSlaves(). Instead of looking at replication lag
3337 * and waiting for it to go down, this waits for the slaves to catch up to the
3338 * master position. Use this when updating very large numbers of rows, as
3339 * in maintenance scripts, to avoid causing too much lag. Of course, this is
3340 * a no-op if there are no slaves.
3342 * @param $maxLag Integer (deprecated)
3343 * @param $wiki mixed Wiki identifier accepted by wfGetLB
3346 function wfWaitForSlaves( $maxLag = false, $wiki = false ) {
3347 $lb = wfGetLB( $wiki );
3348 // bug 27975 - Don't try to wait for slaves if there are none
3349 // Prevents permission error when getting master position
3350 if ( $lb->getServerCount() > 1 ) {
3351 $dbw = $lb->getConnection( DB_MASTER
);
3352 $pos = $dbw->getMasterPos();
3353 $lb->waitForAll( $pos );
3358 * Used to be used for outputting text in the installer/updater
3359 * @deprecated since 1.18, warnings in 1.18, remove in 1.20
3361 function wfOut( $s ) {
3362 wfDeprecated( __METHOD__
);
3363 global $wgCommandLineMode;
3364 if ( $wgCommandLineMode ) {
3367 echo htmlspecialchars( $s );
3373 * Count down from $n to zero on the terminal, with a one-second pause
3374 * between showing each number. For use in command-line scripts.
3375 * @codeCoverageIgnore
3377 function wfCountDown( $n ) {
3378 for ( $i = $n; $i >= 0; $i-- ) {
3380 echo str_repeat( "\x08", strlen( $i +
1 ) );
3392 * Generate a random 32-character hexadecimal token.
3393 * @param $salt Mixed: some sort of salt, if necessary, to add to random
3394 * characters before hashing.
3396 * @codeCoverageIgnore
3398 function wfGenerateToken( $salt = '' ) {
3399 $salt = serialize( $salt );
3400 return md5( mt_rand( 0, 0x7fffffff ) . $salt );
3404 * Replace all invalid characters with -
3406 * @param $name Mixed: filename to process
3409 function wfStripIllegalFilenameChars( $name ) {
3410 global $wgIllegalFileChars;
3411 $name = wfBaseName( $name );
3412 $name = preg_replace(
3413 "/[^" . Title
::legalChars() . "]" .
3414 ( $wgIllegalFileChars ?
"|[" . $wgIllegalFileChars . "]" : '' ) .
3423 * Set PHP's memory limit to the larger of php.ini or $wgMemoryLimit;
3425 * @return Integer value memory was set to.
3427 function wfMemoryLimit() {
3428 global $wgMemoryLimit;
3429 $memlimit = wfShorthandToInteger( ini_get( 'memory_limit' ) );
3430 if( $memlimit != -1 ) {
3431 $conflimit = wfShorthandToInteger( $wgMemoryLimit );
3432 if( $conflimit == -1 ) {
3433 wfDebug( "Removing PHP's memory limit\n" );
3434 wfSuppressWarnings();
3435 ini_set( 'memory_limit', $conflimit );
3436 wfRestoreWarnings();
3438 } elseif ( $conflimit > $memlimit ) {
3439 wfDebug( "Raising PHP's memory limit to $conflimit bytes\n" );
3440 wfSuppressWarnings();
3441 ini_set( 'memory_limit', $conflimit );
3442 wfRestoreWarnings();
3450 * Converts shorthand byte notation to integer form
3452 * @param $string String
3455 function wfShorthandToInteger( $string = '' ) {
3456 $string = trim( $string );
3457 if( $string === '' ) {
3460 $last = $string[strlen( $string ) - 1];
3461 $val = intval( $string );
3466 // break intentionally missing
3470 // break intentionally missing
3480 * Get the normalised IETF language tag
3481 * See unit test for examples.
3483 * @param $code String: The language code.
3484 * @return $langCode String: The language code which complying with BCP 47 standards.
3486 function wfBCP47( $code ) {
3487 $codeSegment = explode( '-', $code );
3489 foreach ( $codeSegment as $segNo => $seg ) {
3490 if ( count( $codeSegment ) > 0 ) {
3491 // when previous segment is x, it is a private segment and should be lc
3492 if( $segNo > 0 && strtolower( $codeSegment[($segNo - 1)] ) == 'x') {
3493 $codeBCP[$segNo] = strtolower( $seg );
3494 // ISO 3166 country code
3495 } elseif ( ( strlen( $seg ) == 2 ) && ( $segNo > 0 ) ) {
3496 $codeBCP[$segNo] = strtoupper( $seg );
3497 // ISO 15924 script code
3498 } elseif ( ( strlen( $seg ) == 4 ) && ( $segNo > 0 ) ) {
3499 $codeBCP[$segNo] = ucfirst( strtolower( $seg ) );
3500 // Use lowercase for other cases
3502 $codeBCP[$segNo] = strtolower( $seg );
3505 // Use lowercase for single segment
3506 $codeBCP[$segNo] = strtolower( $seg );
3509 $langCode = implode( '-', $codeBCP );
3514 * Get a cache object.
3516 * @param $inputType integer Cache type, one the the CACHE_* constants.
3519 function wfGetCache( $inputType ) {
3520 return ObjectCache
::getInstance( $inputType );
3524 * Get the main cache object
3528 function wfGetMainCache() {
3529 global $wgMainCacheType;
3530 return ObjectCache
::getInstance( $wgMainCacheType );
3534 * Get the cache object used by the message cache
3538 function wfGetMessageCacheStorage() {
3539 global $wgMessageCacheType;
3540 return ObjectCache
::getInstance( $wgMessageCacheType );
3544 * Get the cache object used by the parser cache
3548 function wfGetParserCacheStorage() {
3549 global $wgParserCacheType;
3550 return ObjectCache
::getInstance( $wgParserCacheType );
3554 * Call hook functions defined in $wgHooks
3556 * @param $event String: event name
3557 * @param $args Array: parameters passed to hook functions
3560 function wfRunHooks( $event, $args = array() ) {
3561 return Hooks
::run( $event, $args );