includes/DatabaseFunctions.php

   1 <?
   2 global $IP;
   3 include_once( "$IP/FulltextStoplist.php" );
   4 include_once( "$IP/CacheManager.php" );
   5
   6 define( "DB_READ", -1 );
   7 define( "DB_WRITE", -2 );
   8 define( "DB_LAST", -3 );
   9
  10 $wgLastDatabaseQuery = "";
  11
  12 function wfGetDB( $altuser = "", $altpassword = "", $altserver = "", $altdb = "" )
  13 {
  14         global $wgDBserver, $wgDBuser, $wgDBpassword;
  15         global $wgDBname, $wgDBconnection, $wgEmergencyContact;
  16
  17         $noconn = str_replace( "$1", $wgDBserver, wfMsgNoDB( "noconnect" ) );
  18         $nodb = str_replace( "$1", $wgDBname, wfMsgNoDB( "nodb" ) );
  19
  20         $helpme = "\n<p>If this error persists after reloading and clearing " .
  21           "your browser cache, please notify the <a href=\"mailto:" .
  22           $wgEmergencyContact . "\">Wikipedia developers</a>.</p>";
  23
  24         if ( $altuser != "" ) {
  25                 $serve = ($altserver ? $altserver : $wgDBserver );
  26                 $db = ($altdb ? $altdb : $wgDBname );
  27                 $wgDBconnection = mysql_connect( $serve, $altuser, $altpassword )
  28                         or die( "bad sql user" );
  29                 mysql_select_db( $db, $wgDBconnection ) or die(
  30                   htmlspecialchars(mysql_error()) );
  31         }
  32
  33         if ( ! $wgDBconnection ) {
  34                 @$wgDBconnection = mysql_pconnect( $wgDBserver, $wgDBuser, $wgDBpassword )
  35                         or wfEmergencyAbort();
  36
  37                 if( !mysql_select_db( $wgDBname, $wgDBconnection ) ) {
  38                         /* Persistent connections may become stuck in an unusable state */
  39                         wfDebug( "Persistent connection is broken?\n", true );
  40
  41                         @$wgDBconnection = mysql_connect( $wgDBserver, $wgDBuser, $wgDBpassword )
  42                                 or wfEmergencyAbort();
  43
  44                         @mysql_select_db( $wgDBname, $wgDBconnection )
  45                                 or wfEmergencyAbort();
  46                 }
  47         }
  48         # mysql_ping( $wgDBconnection );
  49         return $wgDBconnection;
  50 }
  51
  52 /* Call this function if we couldn't contact the database...
  53    We'll try to use the cache to display something in the meantime */
  54 function wfEmergencyAbort( $msg = "" ) {
  55         global $wgTitle, $wgUseFileCache, $title, $wgOutputEncoding;
  56
  57         header( "Content-type: text/html; charset=$wgOutputEncoding" );
  58         if($msg == "") $msg = wfMsgNoDB( "noconnect" );
  59         $text = $msg;
  60
  61         if($wgUseFileCache) {
  62                 if($wgTitle) {
  63                         $t =& $wgTitle;
  64                 } else {
  65                         if($title) {
  66                                 $t = Title::newFromURL( $title );
  67                         } else {
  68                                 $t = Title::newFromText( wfMsgNoDB( "mainpage" ) );
  69                         }
  70                 }
  71
  72                 $cache = new CacheManager( $t );
  73                 if( $cache->isFileCached() ) {
  74                         $msg = "<p style='color: red'><b>$msg<br>\n" .
  75                                 wfMsgNoDB( "cachederror" ) . "</b></p>\n";
  76
  77                         $tag = "<div id='article'>";
  78                         $text = str_replace(
  79                                 $tag,
  80                                 $tag . $msg,
  81                                 $cache->fetchPageText() );
  82                 }
  83         }
  84
  85         /* Don't cache error pages!  They cause no end of trouble... */
  86         header( "Cache-control: none" );
  87         header( "Pragma: nocache" );
  88         echo $text;
  89         exit;
  90 }
  91
  92 # $db: DB_READ  = -1    read from slave (or only server)
  93 #      DB_WRITE = -2    write to master (or only server)
  94 #      0,1,2,...        query a database with a specific index
  95 # Replication is not actually implemented just yet
  96 function wfQuery( $sql, $db, $fname = "" )
  97 {
  98         global $wgLastDatabaseQuery, $wgOut;
  99 ##      wfProfileIn( "wfQuery" );
 100
 101         if ( !is_numeric( $db ) ) {
 102                 # Someone has tried to call this the old way
 103                 $wgOut->fatalError( wfMsgNoDB( "wrong_wfQuery_params" ) );
 104         }
 105
 106         $wgLastDatabaseQuery = $sql;
 107         $conn = wfGetDB();
 108         $ret = mysql_query( $sql, $conn );
 109
 110         if ( "" != $fname ) {
 111 #               wfDebug( "{$fname}:SQL: {$sql}\n", true );
 112         } else {
 113 #               wfDebug( "SQL: {$sql}\n", true );
 114         }
 115         if ( false === $ret ) {
 116                 $wgOut->databaseError( $fname );
 117                 exit;
 118         }
 119 ##      wfProfileOut();
 120         return $ret;
 121 }
 122
 123 function wfFreeResult( $res ) { mysql_free_result( $res ); }
 124 function wfFetchObject( $res ) { return mysql_fetch_object( $res ); }
 125 function wfNumRows( $res ) { return mysql_num_rows( $res ); }
 126 function wfNumFields( $res ) { return mysql_num_fields( $res ); }
 127 function wfFieldName( $res, $n ) { return mysql_field_name( $res, $n ); }
 128 function wfInsertId() { return mysql_insert_id( wfGetDB() ); }
 129 function wfDataSeek( $res, $row ) { return mysql_data_seek( $res, $row ); }
 130 function wfLastErrno() { return mysql_errno(); }
 131 function wfLastError() { return mysql_error(); }
 132 function wfAffectedRows() { return mysql_affected_rows( wfGetDB() ); }
 133
 134 function wfLastDBquery()
 135 {
 136         global $wgLastDatabaseQuery;
 137         return $wgLastDatabaseQuery;
 138 }
 139
 140 function wfSetSQL( $table, $var, $value, $cond )
 141 {
 142         $sql = "UPDATE $table SET $var = '" .
 143           wfStrencode( $value ) . "' WHERE ($cond)";
 144         wfQuery( $sql, DB_WRITE, "wfSetSQL" );
 145 }
 146
 147 function wfGetSQL( $table, $var, $cond )
 148 {
 149         $sql = "SELECT $var FROM $table WHERE ($cond)";
 150         $result = wfQuery( $sql, DB_READ, "wfGetSQL" );
 151
 152         $ret = "";
 153         if ( mysql_num_rows( $result ) > 0 ) {
 154                 $s = mysql_fetch_object( $result );
 155                 $ret = $s->$var;
 156                 mysql_free_result( $result );
 157         }
 158         return $ret;
 159 }
 160
 161 function wfStrencode( $s )
 162 {
 163         return addslashes( $s );
 164 }
 165
 166 # Ideally we'd be using actual time fields in the db
 167 function wfTimestamp2Unix( $ts ) {
 168         return gmmktime( ( (int)substr( $ts, 8, 2) ),
 169                   (int)substr( $ts, 10, 2 ), (int)substr( $ts, 12, 2 ),
 170                   (int)substr( $ts, 4, 2 ), (int)substr( $ts, 6, 2 ),
 171                   (int)substr( $ts, 0, 4 ) );
 172 }
 173
 174 function wfUnix2Timestamp( $unixtime ) {
 175         return gmdate( "YmdHis", $unixtime );
 176 }
 177
 178 function wfTimestampNow() {
 179         # return NOW
 180         return gmdate( "YmdHis" );
 181 }
 182
 183 # Sorting hack for MySQL 3, which doesn't use index sorts for DESC
 184 function wfInvertTimestamp( $ts ) {
 185         return strtr(
 186                 $ts,
 187                 "0123456789",
 188                 "9876543210"
 189         );
 190 }
 191
 192 ?>