3 if ( !defined( 'MEDIAWIKI' ) ) {
4 die( "This file is part of MediaWiki, it is not a valid entry point" );
8 * Global functions used everywhere
11 require_once dirname(__FILE__
) . '/LogPage.php';
12 require_once dirname(__FILE__
) . '/normal/UtfNormalUtil.php';
13 require_once dirname(__FILE__
) . '/XmlFunctions.php';
16 * Compatibility functions
18 * We more or less support PHP 5.0.x and up.
19 * Re-implementations of newer functions or functions in non-standard
20 * PHP extensions may be included here.
22 if( !function_exists('iconv') ) {
23 # iconv support is not in the default configuration and so may not be present.
24 # Assume will only ever use utf-8 and iso-8859-1.
25 # This will *not* work in all circumstances.
26 function iconv( $from, $to, $string ) {
27 if(strcasecmp( $from, $to ) == 0) return $string;
28 if(strcasecmp( $from, 'utf-8' ) == 0) return utf8_decode( $string );
29 if(strcasecmp( $to, 'utf-8' ) == 0) return utf8_encode( $string );
34 # UTF-8 substr function based on a PHP manual comment
35 if ( !function_exists( 'mb_substr' ) ) {
36 function mb_substr( $str, $start ) {
38 preg_match_all( '/./us', $str, $ar );
40 if( func_num_args() >= 3 ) {
41 $end = func_get_arg( 2 );
42 return join( '', array_slice( $ar[0], $start, $end ) );
44 return join( '', array_slice( $ar[0], $start ) );
49 if ( !function_exists( 'mb_strlen' ) ) {
51 * Fallback implementation of mb_strlen, hardcoded to UTF-8.
53 * @param string $enc optional encoding; ignored
56 function mb_strlen( $str, $enc="" ) {
57 $counts = count_chars( $str );
61 for( $i = 0; $i < 0x80; $i++
) {
62 $total +
= $counts[$i];
65 // Count multibyte sequence heads
66 for( $i = 0xc0; $i < 0xff; $i++
) {
67 $total +
= $counts[$i];
73 if ( !function_exists( 'array_diff_key' ) ) {
75 * Exists in PHP 5.1.0+
76 * Not quite compatible, two-argument version only
77 * Null values will cause problems due to this use of isset()
79 function array_diff_key( $left, $right ) {
81 foreach ( $left as $key => $unused ) {
82 if ( isset( $right[$key] ) ) {
83 unset( $result[$key] );
91 * Like array_diff( $a, $b ) except that it works with two-dimensional arrays.
93 function wfArrayDiff2( $a, $b ) {
94 return array_udiff( $a, $b, 'wfArrayDiff2_cmp' );
96 function wfArrayDiff2_cmp( $a, $b ) {
97 if ( !is_array( $a ) ) {
98 return strcmp( $a, $b );
99 } elseif ( count( $a ) !== count( $b ) ) {
100 return count( $a ) < count( $b ) ?
-1 : 1;
104 while( ( list( $keyA, $valueA ) = each( $a ) ) && ( list( $keyB, $valueB ) = each( $b ) ) ) {
105 $cmp = strcmp( $valueA, $valueB );
115 * Wrapper for clone(), for compatibility with PHP4-friendly extensions.
116 * PHP 5 won't let you declare a 'clone' function, even conditionally,
117 * so it has to be a wrapper with a different name.
119 function wfClone( $object ) {
120 return clone( $object );
124 * Seed Mersenne Twister
125 * No-op for compatibility; only necessary in PHP < 4.2.0
127 function wfSeedRandom() {
132 * Get a random decimal value between 0 and 1, in a way
133 * not likely to give duplicate values for any realistic
134 * number of articles.
138 function wfRandom() {
139 # The maximum random value is "only" 2^31-1, so get two random
140 # values to reduce the chance of dupes
141 $max = mt_getrandmax() +
1;
142 $rand = number_format( (mt_rand() * $max +
mt_rand())
143 / $max / $max, 12, '.', '' );
148 * We want / and : to be included as literal characters in our title URLs.
149 * %2F in the page titles seems to fatally break for some reason.
154 function wfUrlencode ( $s ) {
155 $s = urlencode( $s );
156 $s = preg_replace( '/%3[Aa]/', ':', $s );
157 $s = preg_replace( '/%2[Ff]/', '/', $s );
163 * Sends a line to the debug log if enabled or, optionally, to a comment in output.
164 * In normal operation this is a NOP.
166 * Controlling globals:
167 * $wgDebugLogFile - points to the log file
168 * $wgProfileOnly - if set, normal debug messages will not be recorded.
169 * $wgDebugRawPage - if false, 'action=raw' hits will not result in debug output.
170 * $wgDebugComments - if on, some debug items may appear in comments in the HTML output.
172 * @param $text String
173 * @param $logonly Bool: set true to avoid appearing in HTML when $wgDebugComments is set
175 function wfDebug( $text, $logonly = false ) {
176 global $wgOut, $wgDebugLogFile, $wgDebugComments, $wgProfileOnly, $wgDebugRawPage;
177 static $recursion = 0;
179 # Check for raw action using $_GET not $wgRequest, since the latter might not be initialised yet
180 if ( isset( $_GET['action'] ) && $_GET['action'] == 'raw' && !$wgDebugRawPage ) {
184 if ( $wgDebugComments && !$logonly ) {
185 if ( !isset( $wgOut ) ) {
188 if ( !StubObject
::isRealObject( $wgOut ) ) {
196 $wgOut->debug( $text );
198 if ( '' != $wgDebugLogFile && !$wgProfileOnly ) {
199 # Strip unprintables; they can switch terminal modes when binary data
200 # gets dumped, which is pretty annoying.
201 $text = preg_replace( '![\x00-\x08\x0b\x0c\x0e-\x1f]!', ' ', $text );
202 wfErrorLog( $text, $wgDebugLogFile );
207 * Send a line to a supplementary debug log file, if configured, or main debug log if not.
208 * $wgDebugLogGroups[$logGroup] should be set to a filename to send to a separate log.
210 * @param $logGroup String
211 * @param $text String
212 * @param $public Bool: whether to log the event in the public log if no private
213 * log file is specified, (default true)
215 function wfDebugLog( $logGroup, $text, $public = true ) {
216 global $wgDebugLogGroups;
217 if( $text{strlen( $text ) - 1} != "\n" ) $text .= "\n";
218 if( isset( $wgDebugLogGroups[$logGroup] ) ) {
219 $time = wfTimestamp( TS_DB
);
221 wfErrorLog( "$time $wiki: $text", $wgDebugLogGroups[$logGroup] );
222 } else if ( $public === true ) {
223 wfDebug( $text, true );
228 * Log for database errors
229 * @param $text String: database error message.
231 function wfLogDBError( $text ) {
232 global $wgDBerrorLog, $wgDBname;
233 if ( $wgDBerrorLog ) {
234 $host = trim(`hostname`
);
235 $text = date('D M j G:i:s T Y') . "\t$host\t$wgDBname\t$text";
236 wfErrorLog( $text, $wgDBerrorLog );
241 * Log to a file without getting "file size exceeded" signals
243 function wfErrorLog( $text, $file ) {
244 wfSuppressWarnings();
245 $exists = file_exists( $file );
246 $size = $exists ?
filesize( $file ) : false;
247 if ( !$exists ||
( $size !== false && $size +
strlen( $text ) < 0x7fffffff ) ) {
248 error_log( $text, 3, $file );
256 function wfLogProfilingData() {
257 global $wgRequestTime, $wgDebugLogFile, $wgDebugRawPage, $wgRequest;
258 global $wgProfiler, $wgUser;
259 if ( !isset( $wgProfiler ) )
263 $elapsed = $now - $wgRequestTime;
264 $prof = wfGetProfilingOutput( $wgRequestTime, $elapsed );
266 if( !empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) )
267 $forward = ' forwarded for ' . $_SERVER['HTTP_X_FORWARDED_FOR'];
268 if( !empty( $_SERVER['HTTP_CLIENT_IP'] ) )
269 $forward .= ' client IP ' . $_SERVER['HTTP_CLIENT_IP'];
270 if( !empty( $_SERVER['HTTP_FROM'] ) )
271 $forward .= ' from ' . $_SERVER['HTTP_FROM'];
273 $forward = "\t(proxied via {$_SERVER['REMOTE_ADDR']}{$forward})";
274 // Don't unstub $wgUser at this late stage just for statistics purposes
275 if( StubObject
::isRealObject($wgUser) && $wgUser->isAnon() )
277 $log = sprintf( "%s\t%04.3f\t%s\n",
278 gmdate( 'YmdHis' ), $elapsed,
279 urldecode( $wgRequest->getRequestURL() . $forward ) );
280 if ( '' != $wgDebugLogFile && ( $wgRequest->getVal('action') != 'raw' ||
$wgDebugRawPage ) ) {
281 wfErrorLog( $log . $prof, $wgDebugLogFile );
286 * Check if the wiki read-only lock file is present. This can be used to lock
287 * off editing functions, but doesn't guarantee that the database will not be
291 function wfReadOnly() {
292 global $wgReadOnlyFile, $wgReadOnly;
294 if ( !is_null( $wgReadOnly ) ) {
295 return (bool)$wgReadOnly;
297 if ( '' == $wgReadOnlyFile ) {
300 // Set $wgReadOnly for faster access next time
301 if ( is_file( $wgReadOnlyFile ) ) {
302 $wgReadOnly = file_get_contents( $wgReadOnlyFile );
306 return (bool)$wgReadOnly;
309 function wfReadOnlyReason() {
316 * Get a message from anywhere, for the current user language.
318 * Use wfMsgForContent() instead if the message should NOT
319 * change depending on the user preferences.
321 * @param $key String: lookup key for the message, usually
322 * defined in languages/Language.php
324 * This function also takes extra optional parameters (not
325 * shown in the function definition), which can by used to
326 * insert variable text into the predefined message.
328 function wfMsg( $key ) {
329 $args = func_get_args();
330 array_shift( $args );
331 return wfMsgReal( $key, $args, true );
335 * Same as above except doesn't transform the message
337 function wfMsgNoTrans( $key ) {
338 $args = func_get_args();
339 array_shift( $args );
340 return wfMsgReal( $key, $args, true, false, false );
344 * Get a message from anywhere, for the current global language
345 * set with $wgLanguageCode.
347 * Use this if the message should NOT change dependent on the
348 * language set in the user's preferences. This is the case for
349 * most text written into logs, as well as link targets (such as
350 * the name of the copyright policy page). Link titles, on the
351 * other hand, should be shown in the UI language.
353 * Note that MediaWiki allows users to change the user interface
354 * language in their preferences, but a single installation
355 * typically only contains content in one language.
357 * Be wary of this distinction: If you use wfMsg() where you should
358 * use wfMsgForContent(), a user of the software may have to
359 * customize over 70 messages in order to, e.g., fix a link in every
362 * @param $key String: lookup key for the message, usually
363 * defined in languages/Language.php
365 function wfMsgForContent( $key ) {
366 global $wgForceUIMsgAsContentMsg;
367 $args = func_get_args();
368 array_shift( $args );
370 if( is_array( $wgForceUIMsgAsContentMsg ) &&
371 in_array( $key, $wgForceUIMsgAsContentMsg ) )
373 return wfMsgReal( $key, $args, true, $forcontent );
377 * Same as above except doesn't transform the message
379 function wfMsgForContentNoTrans( $key ) {
380 global $wgForceUIMsgAsContentMsg;
381 $args = func_get_args();
382 array_shift( $args );
384 if( is_array( $wgForceUIMsgAsContentMsg ) &&
385 in_array( $key, $wgForceUIMsgAsContentMsg ) )
387 return wfMsgReal( $key, $args, true, $forcontent, false );
391 * Get a message from the language file, for the UI elements
393 function wfMsgNoDB( $key ) {
394 $args = func_get_args();
395 array_shift( $args );
396 return wfMsgReal( $key, $args, false );
400 * Get a message from the language file, for the content
402 function wfMsgNoDBForContent( $key ) {
403 global $wgForceUIMsgAsContentMsg;
404 $args = func_get_args();
405 array_shift( $args );
407 if( is_array( $wgForceUIMsgAsContentMsg ) &&
408 in_array( $key, $wgForceUIMsgAsContentMsg ) )
410 return wfMsgReal( $key, $args, false, $forcontent );
415 * Really get a message
416 * @param $key String: key to get.
418 * @param $useDB Boolean
419 * @param $transform Boolean: Whether or not to transform the message.
420 * @param $forContent Boolean
421 * @return String: the requested message.
423 function wfMsgReal( $key, $args, $useDB = true, $forContent=false, $transform = true ) {
424 wfProfileIn( __METHOD__
);
425 $message = wfMsgGetKey( $key, $useDB, $forContent, $transform );
426 $message = wfMsgReplaceArgs( $message, $args );
427 wfProfileOut( __METHOD__
);
432 * This function provides the message source for messages to be edited which are *not* stored in the database.
433 * @param $key String:
435 function wfMsgWeirdKey ( $key ) {
436 $source = wfMsgGetKey( $key, false, true, false );
437 if ( wfEmptyMsg( $key, $source ) )
444 * Fetch a message string value, but don't replace any keys yet.
447 * @param string $langcode Code of the language to get the message for, or
448 * behaves as a content language switch if it is a
453 function wfMsgGetKey( $key, $useDB, $langCode = false, $transform = true ) {
454 global $wgParser, $wgContLang, $wgMessageCache, $wgLang;
456 # If $wgMessageCache isn't initialised yet, try to return something sensible.
457 if( is_object( $wgMessageCache ) ) {
458 $message = $wgMessageCache->get( $key, $useDB, $langCode );
460 $message = $wgMessageCache->transform( $message );
463 if( $langCode === true ) {
464 $lang = &$wgContLang;
465 } elseif( $langCode === false ) {
468 $validCodes = array_keys( Language
::getLanguageNames() );
469 if( in_array( $langCode, $validCodes ) ) {
470 # $langcode corresponds to a valid language.
471 $lang = Language
::factory( $langCode );
473 # $langcode is a string, but not a valid language code; use content language.
474 $lang =& $wgContLang;
475 wfDebug( 'Invalid language code passed to wfMsgGetKey, falling back to content language.' );
479 # MessageCache::get() does this already, Language::getMessage() doesn't
480 # ISSUE: Should we try to handle "message/lang" here too?
481 $key = str_replace( ' ' , '_' , $wgContLang->lcfirst( $key ) );
483 if( is_object( $lang ) ) {
484 $message = $lang->getMessage( $key );
494 * Replace message parameter keys on the given formatted output.
496 * @param string $message
501 function wfMsgReplaceArgs( $message, $args ) {
502 # Fix windows line-endings
503 # Some messages are split with explode("\n", $msg)
504 $message = str_replace( "\r", '', $message );
507 if ( count( $args ) ) {
508 if ( is_array( $args[0] ) ) {
509 $args = array_values( $args[0] );
511 $replacementKeys = array();
512 foreach( $args as $n => $param ) {
513 $replacementKeys['$' . ($n +
1)] = $param;
515 $message = strtr( $message, $replacementKeys );
522 * Return an HTML-escaped version of a message.
523 * Parameter replacements, if any, are done *after* the HTML-escaping,
524 * so parameters may contain HTML (eg links or form controls). Be sure
525 * to pre-escape them if you really do want plaintext, or just wrap
526 * the whole thing in htmlspecialchars().
529 * @param string ... parameters
532 function wfMsgHtml( $key ) {
533 $args = func_get_args();
534 array_shift( $args );
535 return wfMsgReplaceArgs( htmlspecialchars( wfMsgGetKey( $key, true ) ), $args );
539 * Return an HTML version of message
540 * Parameter replacements, if any, are done *after* parsing the wiki-text message,
541 * so parameters may contain HTML (eg links or form controls). Be sure
542 * to pre-escape them if you really do want plaintext, or just wrap
543 * the whole thing in htmlspecialchars().
546 * @param string ... parameters
549 function wfMsgWikiHtml( $key ) {
551 $args = func_get_args();
552 array_shift( $args );
553 return wfMsgReplaceArgs( $wgOut->parse( wfMsgGetKey( $key, true ), /* can't be set to false */ true ), $args );
557 * Returns message in the requested format
558 * @param string $key Key of the message
559 * @param array $options Processing rules:
560 * <i>parse</i>: parses wikitext to html
561 * <i>parseinline</i>: parses wikitext to html and removes the surrounding p's added by parser or tidy
562 * <i>escape</i>: filters message through htmlspecialchars
563 * <i>escapenoentities</i>: same, but allows entity references like through
564 * <i>replaceafter</i>: parameters are substituted after parsing or escaping
565 * <i>parsemag</i>: transform the message using magic phrases
566 * <i>content</i>: fetch message for content language instead of interface
567 * <i>language</i>: language code to fetch message for (overriden by <i>content</i>), its behaviour
568 * with parser, parseinline and parsemag is undefined.
569 * Behavior for conflicting options (e.g., parse+parseinline) is undefined.
571 function wfMsgExt( $key, $options ) {
572 global $wgOut, $wgParser;
574 $args = func_get_args();
575 array_shift( $args );
576 array_shift( $args );
578 if( !is_array($options) ) {
579 $options = array($options);
582 if( in_array('content', $options) ) {
585 } elseif( array_key_exists('language', $options) ) {
587 $langCode = $options['language'];
588 $validCodes = array_keys( Language
::getLanguageNames() );
589 if( !in_array($options['language'], $validCodes) ) {
597 $string = wfMsgGetKey( $key, /*DB*/true, $langCode, /*Transform*/false );
599 if( !in_array('replaceafter', $options) ) {
600 $string = wfMsgReplaceArgs( $string, $args );
603 if( in_array('parse', $options) ) {
604 $string = $wgOut->parse( $string, true, !$forContent );
605 } elseif ( in_array('parseinline', $options) ) {
606 $string = $wgOut->parse( $string, true, !$forContent );
608 if( preg_match( '/^<p>(.*)\n?<\/p>\n?$/sU', $string, $m ) ) {
611 } elseif ( in_array('parsemag', $options) ) {
612 global $wgMessageCache;
613 if ( isset( $wgMessageCache ) ) {
614 $string = $wgMessageCache->transform( $string, !$forContent );
618 if ( in_array('escape', $options) ) {
619 $string = htmlspecialchars ( $string );
620 } elseif ( in_array( 'escapenoentities', $options ) ) {
621 $string = htmlspecialchars( $string );
622 $string = str_replace( '&', '&', $string );
623 $string = Sanitizer
::normalizeCharReferences( $string );
626 if( in_array('replaceafter', $options) ) {
627 $string = wfMsgReplaceArgs( $string, $args );
635 * Just like exit() but makes a note of it.
636 * Commits open transactions except if the error parameter is set
638 * @deprecated Please return control to the caller or throw an exception
640 function wfAbruptExit( $error = false ){
641 static $called = false;
647 $bt = wfDebugBacktrace();
649 for($i = 0; $i < count($bt) ; $i++
){
650 $file = isset($bt[$i]['file']) ?
$bt[$i]['file'] : "unknown";
651 $line = isset($bt[$i]['line']) ?
$bt[$i]['line'] : "unknown";
652 wfDebug("WARNING: Abrupt exit in $file at line $line\n");
655 wfDebug('WARNING: Abrupt exit\n');
658 wfLogProfilingData();
661 wfGetLB()->closeAll();
667 * @deprecated Please return control the caller or throw an exception
669 function wfErrorExit() {
670 wfAbruptExit( true );
674 * Print a simple message and die, returning nonzero to the shell if any.
675 * Plain die() fails to return nonzero to the shell if you pass a string.
678 function wfDie( $msg='' ) {
684 * Throw a debugging exception. This function previously once exited the process,
685 * but now throws an exception instead, with similar results.
687 * @param string $msg Message shown when dieing.
689 function wfDebugDieBacktrace( $msg = '' ) {
690 throw new MWException( $msg );
694 * Fetch server name for use in error reporting etc.
695 * Use real server name if available, so we know which machine
696 * in a server farm generated the current page.
699 function wfHostname() {
700 if ( function_exists( 'posix_uname' ) ) {
701 // This function not present on Windows
702 $uname = @posix_uname
();
706 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
707 return $uname['nodename'];
709 # This may be a virtual server.
710 return $_SERVER['SERVER_NAME'];
715 * Returns a HTML comment with the elapsed time since request.
716 * This method has no side effects.
719 function wfReportTime() {
720 global $wgRequestTime, $wgShowHostnames;
723 $elapsed = $now - $wgRequestTime;
725 return $wgShowHostnames
726 ?
sprintf( "<!-- Served by %s in %01.3f secs. -->", wfHostname(), $elapsed )
727 : sprintf( "<!-- Served in %01.3f secs. -->", $elapsed );
731 * Safety wrapper for debug_backtrace().
733 * With Zend Optimizer 3.2.0 loaded, this causes segfaults under somewhat
734 * murky circumstances, which may be triggered in part by stub objects
735 * or other fancy talkin'.
737 * Will return an empty array if Zend Optimizer is detected, otherwise
738 * the output from debug_backtrace() (trimmed).
740 * @return array of backtrace information
742 function wfDebugBacktrace() {
743 if( extension_loaded( 'Zend Optimizer' ) ) {
744 wfDebug( "Zend Optimizer detected; skipping debug_backtrace for safety.\n" );
747 return array_slice( debug_backtrace(), 1 );
751 function wfBacktrace() {
752 global $wgCommandLineMode;
754 if ( $wgCommandLineMode ) {
759 $backtrace = wfDebugBacktrace();
760 foreach( $backtrace as $call ) {
761 if( isset( $call['file'] ) ) {
762 $f = explode( DIRECTORY_SEPARATOR
, $call['file'] );
763 $file = $f[count($f)-1];
767 if( isset( $call['line'] ) ) {
768 $line = $call['line'];
772 if ( $wgCommandLineMode ) {
773 $msg .= "$file line $line calls ";
775 $msg .= '<li>' . $file . ' line ' . $line . ' calls ';
777 if( !empty( $call['class'] ) ) $msg .= $call['class'] . '::';
778 $msg .= $call['function'] . '()';
780 if ( $wgCommandLineMode ) {
786 if ( $wgCommandLineMode ) {
796 /* Some generic result counters, pulled out of SearchEngine */
802 function wfShowingResults( $offset, $limit ) {
804 return wfMsgExt( 'showingresults', array( 'parseinline' ), $wgLang->formatNum( $limit ), $wgLang->formatNum( $offset+
1 ) );
810 function wfShowingResultsNum( $offset, $limit, $num ) {
812 return wfMsgExt( 'showingresultsnum', array( 'parseinline' ), $wgLang->formatNum( $limit ), $wgLang->formatNum( $offset+
1 ), $wgLang->formatNum( $num ) );
818 function wfViewPrevNext( $offset, $limit, $link, $query = '', $atend = false ) {
820 $fmtLimit = $wgLang->formatNum( $limit );
821 $prev = wfMsg( 'prevn', $fmtLimit );
822 $next = wfMsg( 'nextn', $fmtLimit );
824 if( is_object( $link ) ) {
827 $title = Title
::newFromText( $link );
828 if( is_null( $title ) ) {
833 if ( 0 != $offset ) {
834 $po = $offset - $limit;
835 if ( $po < 0 ) { $po = 0; }
836 $q = "limit={$limit}&offset={$po}";
837 if ( '' != $query ) { $q .= '&'.$query; }
838 $plink = '<a href="' . $title->escapeLocalUrl( $q ) . "\" class=\"mw-prevlink\">{$prev}</a>";
839 } else { $plink = $prev; }
841 $no = $offset +
$limit;
842 $q = 'limit='.$limit.'&offset='.$no;
843 if ( '' != $query ) { $q .= '&'.$query; }
848 $nlink = '<a href="' . $title->escapeLocalUrl( $q ) . "\" class=\"mw-nextlink\">{$next}</a>";
850 $nums = wfNumLink( $offset, 20, $title, $query ) . ' | ' .
851 wfNumLink( $offset, 50, $title, $query ) . ' | ' .
852 wfNumLink( $offset, 100, $title, $query ) . ' | ' .
853 wfNumLink( $offset, 250, $title, $query ) . ' | ' .
854 wfNumLink( $offset, 500, $title, $query );
856 return wfMsg( 'viewprevnext', $plink, $nlink, $nums );
862 function wfNumLink( $offset, $limit, &$title, $query = '' ) {
864 if ( '' == $query ) { $q = ''; }
865 else { $q = $query.'&'; }
866 $q .= 'limit='.$limit.'&offset='.$offset;
868 $fmtLimit = $wgLang->formatNum( $limit );
869 $s = '<a href="' . $title->escapeLocalUrl( $q ) . "\" class=\"mw-numlink\">{$fmtLimit}</a>";
875 * @todo FIXME: we may want to blacklist some broken browsers
877 * @return bool Whereas client accept gzip compression
879 function wfClientAcceptsGzip() {
882 # FIXME: we may want to blacklist some broken browsers
885 '/\bgzip(?:;(q)=([0-9]+(?:\.[0-9]+)))?\b/',
886 $_SERVER['HTTP_ACCEPT_ENCODING'],
888 if( isset( $m[2] ) && ( $m[1] == 'q' ) && ( $m[2] == 0 ) ) return false;
889 wfDebug( " accepts gzip\n" );
897 * Obtain the offset and limit values from the request string;
898 * used in special pages
900 * @param $deflimit Default limit if none supplied
901 * @param $optionname Name of a user preference to check against
905 function wfCheckLimits( $deflimit = 50, $optionname = 'rclimit' ) {
907 return $wgRequest->getLimitOffset( $deflimit, $optionname );
911 * Escapes the given text so that it may be output using addWikiText()
912 * without any linking, formatting, etc. making its way through. This
913 * is achieved by substituting certain characters with HTML entities.
914 * As required by the callers, <nowiki> is not used. It currently does
915 * not filter out characters which have special meaning only at the
916 * start of a line, such as "*".
918 * @param string $text Text to be escaped
920 function wfEscapeWikiText( $text ) {
922 array( '[', '|', ']', '\'', 'ISBN ', 'RFC ', '://', "\n=", '{{' ),
923 array( '[', '|', ']', ''', 'ISBN ', 'RFC ', '://', "\n=", '{{' ),
924 htmlspecialchars($text) );
931 function wfQuotedPrintable( $string, $charset = '' ) {
932 # Probably incomplete; see RFC 2045
933 if( empty( $charset ) ) {
934 global $wgInputEncoding;
935 $charset = $wgInputEncoding;
937 $charset = strtoupper( $charset );
938 $charset = str_replace( 'ISO-8859', 'ISO8859', $charset ); // ?
940 $illegal = '\x00-\x08\x0b\x0c\x0e-\x1f\x7f-\xff=';
941 $replace = $illegal . '\t ?_';
942 if( !preg_match( "/[$illegal]/", $string ) ) return $string;
943 $out = "=?$charset?Q?";
944 $out .= preg_replace( "/([$replace])/e", 'sprintf("=%02X",ord("$1"))', $string );
955 return microtime(true);
959 * Sets dest to source and returns the original value of dest
960 * If source is NULL, it just returns the value, it doesn't set the variable
962 function wfSetVar( &$dest, $source ) {
964 if ( !is_null( $source ) ) {
971 * As for wfSetVar except setting a bit
973 function wfSetBit( &$dest, $bit, $state = true ) {
974 $temp = (bool)($dest & $bit );
975 if ( !is_null( $state ) ) {
986 * This function takes two arrays as input, and returns a CGI-style string, e.g.
987 * "days=7&limit=100". Options in the first array override options in the second.
988 * Options set to "" will not be output.
990 function wfArrayToCGI( $array1, $array2 = NULL )
992 if ( !is_null( $array2 ) ) {
993 $array1 = $array1 +
$array2;
997 foreach ( $array1 as $key => $value ) {
998 if ( '' !== $value ) {
1002 if(is_array($value))
1003 foreach($value as $v)
1004 $cgi .= urlencode( $key . '[]' ) . '=' .
1007 $cgi .= urlencode( $key ) . '=' .
1008 urlencode( $value );
1015 * Append a query string to an existing URL, which may or may not already
1016 * have query string parameters already. If so, they will be combined.
1018 * @param string $url
1019 * @param string $query
1022 function wfAppendQuery( $url, $query ) {
1023 if( $query != '' ) {
1024 if( false === strpos( $url, '?' ) ) {
1035 * Expand a potentially local URL to a fully-qualified URL.
1036 * Assumes $wgServer is correct. :)
1037 * @param string $url, either fully-qualified or a local path + query
1038 * @return string Fully-qualified URL
1040 function wfExpandUrl( $url ) {
1041 if( substr( $url, 0, 1 ) == '/' ) {
1043 return $wgServer . $url;
1050 * This is obsolete, use SquidUpdate::purge()
1053 function wfPurgeSquidServers ($urlArr) {
1054 SquidUpdate
::purge( $urlArr );
1058 * Windows-compatible version of escapeshellarg()
1059 * Windows doesn't recognise single-quotes in the shell, but the escapeshellarg()
1060 * function puts single quotes in regardless of OS
1062 function wfEscapeShellArg( ) {
1063 $args = func_get_args();
1066 foreach ( $args as $arg ) {
1073 if ( wfIsWindows() ) {
1074 // Escaping for an MSVC-style command line parser
1075 // Ref: http://mailman.lyra.org/pipermail/scite-interest/2002-March/000436.html
1076 // Double the backslashes before any double quotes. Escape the double quotes.
1077 $tokens = preg_split( '/(\\\\*")/', $arg, -1, PREG_SPLIT_DELIM_CAPTURE
);
1080 foreach ( $tokens as $token ) {
1082 $arg .= str_replace( '\\', '\\\\', substr( $token, 0, -1 ) ) . '\\"';
1088 // Double the backslashes before the end of the string, because
1089 // we will soon add a quote
1091 if ( preg_match( '/^(.*?)(\\\\+)$/', $arg, $m ) ) {
1092 $arg = $m[1] . str_replace( '\\', '\\\\', $m[2] );
1095 // Add surrounding quotes
1096 $retVal .= '"' . $arg . '"';
1098 $retVal .= escapeshellarg( $arg );
1105 * wfMerge attempts to merge differences between three texts.
1106 * Returns true for a clean merge and false for failure or a conflict.
1108 function wfMerge( $old, $mine, $yours, &$result ){
1111 # This check may also protect against code injection in
1112 # case of broken installations.
1113 if(! file_exists( $wgDiff3 ) ){
1114 wfDebug( "diff3 not found\n" );
1118 # Make temporary files
1120 $oldtextFile = fopen( $oldtextName = tempnam( $td, 'merge-old-' ), 'w' );
1121 $mytextFile = fopen( $mytextName = tempnam( $td, 'merge-mine-' ), 'w' );
1122 $yourtextFile = fopen( $yourtextName = tempnam( $td, 'merge-your-' ), 'w' );
1124 fwrite( $oldtextFile, $old ); fclose( $oldtextFile );
1125 fwrite( $mytextFile, $mine ); fclose( $mytextFile );
1126 fwrite( $yourtextFile, $yours ); fclose( $yourtextFile );
1128 # Check for a conflict
1129 $cmd = $wgDiff3 . ' -a --overlap-only ' .
1130 wfEscapeShellArg( $mytextName ) . ' ' .
1131 wfEscapeShellArg( $oldtextName ) . ' ' .
1132 wfEscapeShellArg( $yourtextName );
1133 $handle = popen( $cmd, 'r' );
1135 if( fgets( $handle, 1024 ) ){
1143 $cmd = $wgDiff3 . ' -a -e --merge ' .
1144 wfEscapeShellArg( $mytextName, $oldtextName, $yourtextName );
1145 $handle = popen( $cmd, 'r' );
1148 $data = fread( $handle, 8192 );
1149 if ( strlen( $data ) == 0 ) {
1155 unlink( $mytextName ); unlink( $oldtextName ); unlink( $yourtextName );
1157 if ( $result === '' && $old !== '' && $conflict == false ) {
1158 wfDebug( "Unexpected null result from diff3. Command: $cmd\n" );
1167 function wfVarDump( $var ) {
1169 $s = str_replace("\n","<br />\n", var_export( $var, true ) . "\n");
1170 if ( headers_sent() ||
!@is_object
( $wgOut ) ) {
1173 $wgOut->addHTML( $s );
1178 * Provide a simple HTTP error.
1180 function wfHttpError( $code, $label, $desc ) {
1183 header( "HTTP/1.0 $code $label" );
1184 header( "Status: $code $label" );
1185 $wgOut->sendCacheControl();
1187 header( 'Content-type: text/html; charset=utf-8' );
1188 print "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">".
1189 "<html><head><title>" .
1190 htmlspecialchars( $label ) .
1191 "</title></head><body><h1>" .
1192 htmlspecialchars( $label ) .
1194 nl2br( htmlspecialchars( $desc ) ) .
1195 "</p></body></html>\n";
1199 * Clear away any user-level output buffers, discarding contents.
1201 * Suitable for 'starting afresh', for instance when streaming
1202 * relatively large amounts of data without buffering, or wanting to
1203 * output image files without ob_gzhandler's compression.
1205 * The optional $resetGzipEncoding parameter controls suppression of
1206 * the Content-Encoding header sent by ob_gzhandler; by default it
1207 * is left. See comments for wfClearOutputBuffers() for why it would
1210 * Note that some PHP configuration options may add output buffer
1211 * layers which cannot be removed; these are left in place.
1213 * @param bool $resetGzipEncoding
1215 function wfResetOutputBuffers( $resetGzipEncoding=true ) {
1216 if( $resetGzipEncoding ) {
1217 // Suppress Content-Encoding and Content-Length
1218 // headers from 1.10+s wfOutputHandler
1219 global $wgDisableOutputCompression;
1220 $wgDisableOutputCompression = true;
1222 while( $status = ob_get_status() ) {
1223 if( $status['type'] == 0 /* PHP_OUTPUT_HANDLER_INTERNAL */ ) {
1224 // Probably from zlib.output_compression or other
1225 // PHP-internal setting which can't be removed.
1227 // Give up, and hope the result doesn't break
1231 if( !ob_end_clean() ) {
1232 // Could not remove output buffer handler; abort now
1233 // to avoid getting in some kind of infinite loop.
1236 if( $resetGzipEncoding ) {
1237 if( $status['name'] == 'ob_gzhandler' ) {
1238 // Reset the 'Content-Encoding' field set by this handler
1239 // so we can start fresh.
1240 header( 'Content-Encoding:' );
1247 * More legible than passing a 'false' parameter to wfResetOutputBuffers():
1249 * Clear away output buffers, but keep the Content-Encoding header
1250 * produced by ob_gzhandler, if any.
1252 * This should be used for HTTP 304 responses, where you need to
1253 * preserve the Content-Encoding header of the real result, but
1254 * also need to suppress the output of ob_gzhandler to keep to spec
1255 * and avoid breaking Firefox in rare cases where the headers and
1256 * body are broken over two packets.
1258 function wfClearOutputBuffers() {
1259 wfResetOutputBuffers( false );
1263 * Converts an Accept-* header into an array mapping string values to quality
1266 function wfAcceptToPrefs( $accept, $def = '*/*' ) {
1267 # No arg means accept anything (per HTTP spec)
1269 return array( $def => 1 );
1274 $parts = explode( ',', $accept );
1276 foreach( $parts as $part ) {
1277 # FIXME: doesn't deal with params like 'text/html; level=1'
1278 @list
( $value, $qpart ) = explode( ';', $part );
1280 if( !isset( $qpart ) ) {
1282 } elseif( preg_match( '/q\s*=\s*(\d*\.\d+)/', $qpart, $match ) ) {
1283 $prefs[$value] = $match[1];
1291 * Checks if a given MIME type matches any of the keys in the given
1292 * array. Basic wildcards are accepted in the array keys.
1294 * Returns the matching MIME type (or wildcard) if a match, otherwise
1297 * @param string $type
1298 * @param array $avail
1302 function mimeTypeMatch( $type, $avail ) {
1303 if( array_key_exists($type, $avail) ) {
1306 $parts = explode( '/', $type );
1307 if( array_key_exists( $parts[0] . '/*', $avail ) ) {
1308 return $parts[0] . '/*';
1309 } elseif( array_key_exists( '*/*', $avail ) ) {
1318 * Returns the 'best' match between a client's requested internet media types
1319 * and the server's list of available types. Each list should be an associative
1320 * array of type to preference (preference is a float between 0.0 and 1.0).
1321 * Wildcards in the types are acceptable.
1323 * @param array $cprefs Client's acceptable type list
1324 * @param array $sprefs Server's offered types
1327 * @todo FIXME: doesn't handle params like 'text/plain; charset=UTF-8'
1328 * XXX: generalize to negotiate other stuff
1330 function wfNegotiateType( $cprefs, $sprefs ) {
1333 foreach( array_keys($sprefs) as $type ) {
1334 $parts = explode( '/', $type );
1335 if( $parts[1] != '*' ) {
1336 $ckey = mimeTypeMatch( $type, $cprefs );
1338 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
1343 foreach( array_keys( $cprefs ) as $type ) {
1344 $parts = explode( '/', $type );
1345 if( $parts[1] != '*' && !array_key_exists( $type, $sprefs ) ) {
1346 $skey = mimeTypeMatch( $type, $sprefs );
1348 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
1356 foreach( array_keys( $combine ) as $type ) {
1357 if( $combine[$type] > $bestq ) {
1359 $bestq = $combine[$type];
1368 * Returns an array where the values in the first array are replaced by the
1369 * values in the second array with the corresponding keys
1373 function wfArrayLookup( $a, $b ) {
1374 return array_flip( array_intersect( array_flip( $a ), array_keys( $b ) ) );
1378 * Convenience function; returns MediaWiki timestamp for the present time.
1381 function wfTimestampNow() {
1383 return wfTimestamp( TS_MW
, time() );
1387 * Reference-counted warning suppression
1389 function wfSuppressWarnings( $end = false ) {
1390 static $suppressCount = 0;
1391 static $originalLevel = false;
1394 if ( $suppressCount ) {
1396 if ( !$suppressCount ) {
1397 error_reporting( $originalLevel );
1401 if ( !$suppressCount ) {
1402 $originalLevel = error_reporting( E_ALL
& ~
( E_WARNING | E_NOTICE
) );
1409 * Restore error level to previous value
1411 function wfRestoreWarnings() {
1412 wfSuppressWarnings( true );
1415 # Autodetect, convert and provide timestamps of various types
1418 * Unix time - the number of seconds since 1970-01-01 00:00:00 UTC
1420 define('TS_UNIX', 0);
1423 * MediaWiki concatenated string timestamp (YYYYMMDDHHMMSS)
1428 * MySQL DATETIME (YYYY-MM-DD HH:MM:SS)
1433 * RFC 2822 format, for E-mail and HTTP headers
1435 define('TS_RFC2822', 3);
1438 * ISO 8601 format with no timezone: 1986-02-09T20:00:00Z
1440 * This is used by Special:Export
1442 define('TS_ISO_8601', 4);
1445 * An Exif timestamp (YYYY:MM:DD HH:MM:SS)
1447 * @see http://exif.org/Exif2-2.PDF The Exif 2.2 spec, see page 28 for the
1448 * DateTime tag and page 36 for the DateTimeOriginal and
1449 * DateTimeDigitized tags.
1451 define('TS_EXIF', 5);
1454 * Oracle format time.
1456 define('TS_ORACLE', 6);
1459 * Postgres format time.
1461 define('TS_POSTGRES', 7);
1464 * @param mixed $outputtype A timestamp in one of the supported formats, the
1465 * function will autodetect which format is supplied
1466 * and act accordingly.
1467 * @return string Time in the format specified in $outputtype
1469 function wfTimestamp($outputtype=TS_UNIX
,$ts=0) {
1474 } elseif (preg_match('/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)$/D',$ts,$da)) {
1476 } elseif (preg_match('/^(\d{4}):(\d\d):(\d\d) (\d\d):(\d\d):(\d\d)$/D',$ts,$da)) {
1478 } elseif (preg_match('/^(\d{4})(\d\d)(\d\d)(\d\d)(\d\d)(\d\d)$/D',$ts,$da)) {
1480 } elseif (preg_match('/^\d{1,13}$/D',$ts)) {
1483 } elseif (preg_match('/^\d{1,2}-...-\d\d(?:\d\d)? \d\d\.\d\d\.\d\d/', $ts)) {
1485 $uts = strtotime(preg_replace('/(\d\d)\.(\d\d)\.(\d\d)(\.(\d+))?/', "$1:$2:$3",
1486 str_replace("+00:00", "UTC", $ts)));
1487 } elseif (preg_match('/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})Z$/', $ts, $da)) {
1489 } elseif (preg_match('/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d)[\+\- ](\d\d)$/',$ts,$da)) {
1491 } elseif (preg_match('/^(\d{4})\-(\d\d)\-(\d\d) (\d\d):(\d\d):(\d\d) GMT$/',$ts,$da)) {
1494 # Bogus value; fall back to the epoch...
1495 wfDebug("wfTimestamp() fed bogus time value: $outputtype; $ts\n");
1499 if (count( $da ) ) {
1500 // Warning! gmmktime() acts oddly if the month or day is set to 0
1501 // We may want to handle that explicitly at some point
1502 $uts=gmmktime((int)$da[4],(int)$da[5],(int)$da[6],
1503 (int)$da[2],(int)$da[3],(int)$da[1]);
1506 switch($outputtype) {
1510 return gmdate( 'YmdHis', $uts );
1512 return gmdate( 'Y-m-d H:i:s', $uts );
1514 return gmdate( 'Y-m-d\TH:i:s\Z', $uts );
1515 // This shouldn't ever be used, but is included for completeness
1517 return gmdate( 'Y:m:d H:i:s', $uts );
1519 return gmdate( 'D, d M Y H:i:s', $uts ) . ' GMT';
1521 return gmdate( 'd-M-y h.i.s A', $uts) . ' +00:00';
1523 return gmdate( 'Y-m-d H:i:s', $uts) . ' GMT';
1525 throw new MWException( 'wfTimestamp() called with illegal output type.');
1530 * Return a formatted timestamp, or null if input is null.
1531 * For dealing with nullable timestamp columns in the database.
1532 * @param int $outputtype
1536 function wfTimestampOrNull( $outputtype = TS_UNIX
, $ts = null ) {
1537 if( is_null( $ts ) ) {
1540 return wfTimestamp( $outputtype, $ts );
1545 * Check if the operating system is Windows
1547 * @return bool True if it's Windows, False otherwise.
1549 function wfIsWindows() {
1550 if (substr(php_uname(), 0, 7) == 'Windows') {
1558 * Swap two variables
1560 function swap( &$x, &$y ) {
1566 function wfGetCachedNotice( $name ) {
1567 global $wgOut, $parserMemc;
1568 $fname = 'wfGetCachedNotice';
1569 wfProfileIn( $fname );
1573 if( $name === 'default' ) {
1575 global $wgSiteNotice;
1576 $notice = $wgSiteNotice;
1577 if( empty( $notice ) ) {
1578 wfProfileOut( $fname );
1582 $notice = wfMsgForContentNoTrans( $name );
1583 if( wfEmptyMsg( $name, $notice ) ||
$notice == '-' ) {
1584 wfProfileOut( $fname );
1589 $cachedNotice = $parserMemc->get( wfMemcKey( $name ) );
1590 if( is_array( $cachedNotice ) ) {
1591 if( md5( $notice ) == $cachedNotice['hash'] ) {
1592 $notice = $cachedNotice['html'];
1601 if( is_object( $wgOut ) ) {
1602 $parsed = $wgOut->parse( $notice );
1603 $parserMemc->set( wfMemcKey( $name ), array( 'html' => $parsed, 'hash' => md5( $notice ) ), 600 );
1606 wfDebug( 'wfGetCachedNotice called for ' . $name . ' with no $wgOut available' );
1611 wfProfileOut( $fname );
1615 function wfGetNamespaceNotice() {
1619 if ( !isset( $wgTitle ) ||
!is_object( $wgTitle ) )
1622 $fname = 'wfGetNamespaceNotice';
1623 wfProfileIn( $fname );
1625 $key = "namespacenotice-" . $wgTitle->getNsText();
1626 $namespaceNotice = wfGetCachedNotice( $key );
1627 if ( $namespaceNotice && substr ( $namespaceNotice , 0 ,7 ) != "<p><" ) {
1628 $namespaceNotice = '<div id="namespacebanner">' . $namespaceNotice . "</div>";
1630 $namespaceNotice = "";
1633 wfProfileOut( $fname );
1634 return $namespaceNotice;
1637 function wfGetSiteNotice() {
1638 global $wgUser, $wgSiteNotice;
1639 $fname = 'wfGetSiteNotice';
1640 wfProfileIn( $fname );
1643 if( wfRunHooks( 'SiteNoticeBefore', array( &$siteNotice ) ) ) {
1644 if( is_object( $wgUser ) && $wgUser->isLoggedIn() ) {
1645 $siteNotice = wfGetCachedNotice( 'sitenotice' );
1647 $anonNotice = wfGetCachedNotice( 'anonnotice' );
1648 if( !$anonNotice ) {
1649 $siteNotice = wfGetCachedNotice( 'sitenotice' );
1651 $siteNotice = $anonNotice;
1654 if( !$siteNotice ) {
1655 $siteNotice = wfGetCachedNotice( 'default' );
1659 wfRunHooks( 'SiteNoticeAfter', array( &$siteNotice ) );
1660 wfProfileOut( $fname );
1665 * BC wrapper for MimeMagic::singleton()
1668 function &wfGetMimeMagic() {
1669 return MimeMagic
::singleton();
1673 * Tries to get the system directory for temporary files.
1674 * The TMPDIR, TMP, and TEMP environment variables are checked in sequence,
1675 * and if none are set /tmp is returned as the generic Unix default.
1677 * NOTE: When possible, use the tempfile() function to create temporary
1678 * files to avoid race conditions on file creation, etc.
1682 function wfTempDir() {
1683 foreach( array( 'TMPDIR', 'TMP', 'TEMP' ) as $var ) {
1684 $tmp = getenv( $var );
1685 if( $tmp && file_exists( $tmp ) && is_dir( $tmp ) && is_writable( $tmp ) ) {
1689 # Hope this is Unix of some kind!
1694 * Make directory, and make all parent directories if they don't exist
1696 function wfMkdirParents( $fullDir, $mode = 0777 ) {
1697 if( strval( $fullDir ) === '' )
1699 if( file_exists( $fullDir ) )
1701 return mkdir( str_replace( '/', DIRECTORY_SEPARATOR
, $fullDir ), $mode, true );
1705 * Increment a statistics counter
1707 function wfIncrStats( $key ) {
1708 global $wgStatsMethod;
1710 if( $wgStatsMethod == 'udp' ) {
1711 global $wgUDPProfilerHost, $wgUDPProfilerPort, $wgDBname;
1714 $socket=socket_create(AF_INET
, SOCK_DGRAM
, SOL_UDP
);
1715 $statline="stats/{$wgDBname} - 1 1 1 1 1 -total\n";
1716 socket_sendto($socket,$statline,strlen($statline),0,$wgUDPProfilerHost,$wgUDPProfilerPort);
1718 $statline="stats/{$wgDBname} - 1 1 1 1 1 {$key}\n";
1719 @socket_sendto
($socket,$statline,strlen($statline),0,$wgUDPProfilerHost,$wgUDPProfilerPort);
1720 } elseif( $wgStatsMethod == 'cache' ) {
1722 $key = wfMemcKey( 'stats', $key );
1723 if ( is_null( $wgMemc->incr( $key ) ) ) {
1724 $wgMemc->add( $key, 1 );
1732 * @param mixed $nr The number to format
1733 * @param int $acc The number of digits after the decimal point, default 2
1734 * @param bool $round Whether or not to round the value, default true
1737 function wfPercent( $nr, $acc = 2, $round = true ) {
1738 $ret = sprintf( "%.${acc}f", $nr );
1739 return $round ?
round( $ret, $acc ) . '%' : "$ret%";
1743 * Encrypt a username/password.
1745 * @param string $userid ID of the user
1746 * @param string $password Password of the user
1747 * @return string Hashed password
1749 function wfEncryptPassword( $userid, $password ) {
1750 global $wgPasswordSalt;
1751 $p = md5( $password);
1754 return md5( "{$userid}-{$p}" );
1760 * Appends to second array if $value differs from that in $default
1762 function wfAppendToArrayIfNotDefault( $key, $value, $default, &$changed ) {
1763 if ( is_null( $changed ) ) {
1764 throw new MWException('GlobalFunctions::wfAppendToArrayIfNotDefault got null');
1766 if ( $default[$key] !== $value ) {
1767 $changed[$key] = $value;
1772 * Since wfMsg() and co suck, they don't return false if the message key they
1773 * looked up didn't exist but a XHTML string, this function checks for the
1774 * nonexistance of messages by looking at wfMsg() output
1776 * @param $msg The message key looked up
1777 * @param $wfMsgOut The output of wfMsg*()
1780 function wfEmptyMsg( $msg, $wfMsgOut ) {
1781 return $wfMsgOut === htmlspecialchars( "<$msg>" );
1785 * Find out whether or not a mixed variable exists in a string
1787 * @param mixed needle
1788 * @param string haystack
1791 function in_string( $needle, $str ) {
1792 return strpos( $str, $needle ) !== false;
1795 function wfSpecialList( $page, $details ) {
1797 $details = $details ?
' ' . $wgContLang->getDirMark() . "($details)" : "";
1798 return $page . $details;
1802 * Returns a regular expression of url protocols
1806 function wfUrlProtocols() {
1807 global $wgUrlProtocols;
1809 // Support old-style $wgUrlProtocols strings, for backwards compatibility
1810 // with LocalSettings files from 1.5
1811 if ( is_array( $wgUrlProtocols ) ) {
1812 $protocols = array();
1813 foreach ($wgUrlProtocols as $protocol)
1814 $protocols[] = preg_quote( $protocol, '/' );
1816 return implode( '|', $protocols );
1818 return $wgUrlProtocols;
1823 * Safety wrapper around ini_get() for boolean settings.
1824 * The values returned from ini_get() are pre-normalized for settings
1825 * set via php.ini or php_flag/php_admin_flag... but *not*
1826 * for those set via php_value/php_admin_value.
1828 * It's fairly common for people to use php_value instead of php_flag,
1829 * which can leave you with an 'off' setting giving a false positive
1830 * for code that just takes the ini_get() return value as a boolean.
1832 * To make things extra interesting, setting via php_value accepts
1833 * "true" and "yes" as true, but php.ini and php_flag consider them false. :)
1834 * Unrecognized values go false... again opposite PHP's own coercion
1835 * from string to bool.
1837 * Luckily, 'properly' set settings will always come back as '0' or '1',
1838 * so we only have to worry about them and the 'improper' settings.
1840 * I frickin' hate PHP... :P
1842 * @param string $setting
1845 function wfIniGetBool( $setting ) {
1846 $val = ini_get( $setting );
1847 // 'on' and 'true' can't have whitespace around them, but '1' can.
1848 return strtolower( $val ) == 'on'
1849 ||
strtolower( $val ) == 'true'
1850 ||
strtolower( $val ) == 'yes'
1851 ||
preg_match( "/^\s*[+-]?0*[1-9]/", $val ); // approx C atoi() function
1855 * Execute a shell command, with time and memory limits mirrored from the PHP
1856 * configuration if supported.
1857 * @param $cmd Command line, properly escaped for shell.
1858 * @param &$retval optional, will receive the program's exit code.
1859 * (non-zero is usually failure)
1860 * @return collected stdout as a string (trailing newlines stripped)
1862 function wfShellExec( $cmd, &$retval=null ) {
1863 global $IP, $wgMaxShellMemory, $wgMaxShellFileSize;
1865 if( wfIniGetBool( 'safe_mode' ) ) {
1866 wfDebug( "wfShellExec can't run in safe_mode, PHP's exec functions are too broken.\n" );
1868 return "Unable to run external programs in safe mode.";
1871 if ( php_uname( 's' ) == 'Linux' ) {
1872 $time = intval( ini_get( 'max_execution_time' ) );
1873 $mem = intval( $wgMaxShellMemory );
1874 $filesize = intval( $wgMaxShellFileSize );
1876 if ( $time > 0 && $mem > 0 ) {
1877 $script = "$IP/bin/ulimit4.sh";
1878 if ( is_executable( $script ) ) {
1879 $cmd = escapeshellarg( $script ) . " $time $mem $filesize " . escapeshellarg( $cmd );
1882 } elseif ( php_uname( 's' ) == 'Windows NT' ) {
1883 # This is a hack to work around PHP's flawed invocation of cmd.exe
1884 # http://news.php.net/php.internals/21796
1885 $cmd = '"' . $cmd . '"';
1887 wfDebug( "wfShellExec: $cmd\n" );
1889 $retval = 1; // error by default?
1891 passthru( $cmd, $retval );
1892 $output = ob_get_contents();
1899 * This function works like "use VERSION" in Perl, the program will die with a
1900 * backtrace if the current version of PHP is less than the version provided
1902 * This is useful for extensions which due to their nature are not kept in sync
1903 * with releases, and might depend on other versions of PHP than the main code
1905 * Note: PHP might die due to parsing errors in some cases before it ever
1906 * manages to call this function, such is life
1908 * @see perldoc -f use
1910 * @param mixed $version The version to check, can be a string, an integer, or
1913 function wfUsePHP( $req_ver ) {
1914 $php_ver = PHP_VERSION
;
1916 if ( version_compare( $php_ver, (string)$req_ver, '<' ) )
1917 throw new MWException( "PHP $req_ver required--this is only $php_ver" );
1921 * This function works like "use VERSION" in Perl except it checks the version
1922 * of MediaWiki, the program will die with a backtrace if the current version
1923 * of MediaWiki is less than the version provided.
1925 * This is useful for extensions which due to their nature are not kept in sync
1928 * @see perldoc -f use
1930 * @param mixed $version The version to check, can be a string, an integer, or
1933 function wfUseMW( $req_ver ) {
1936 if ( version_compare( $wgVersion, (string)$req_ver, '<' ) )
1937 throw new MWException( "MediaWiki $req_ver required--this is only $wgVersion" );
1941 * @deprecated use StringUtils::escapeRegexReplacement
1943 function wfRegexReplacement( $string ) {
1944 return StringUtils
::escapeRegexReplacement( $string );
1948 * Return the final portion of a pathname.
1949 * Reimplemented because PHP5's basename() is buggy with multibyte text.
1950 * http://bugs.php.net/bug.php?id=33898
1952 * PHP's basename() only considers '\' a pathchar on Windows and Netware.
1953 * We'll consider it so always, as we don't want \s in our Unix paths either.
1955 * @param string $path
1956 * @param string $suffix to remove if present
1959 function wfBaseName( $path, $suffix='' ) {
1960 $encSuffix = ($suffix == '')
1962 : ( '(?:' . preg_quote( $suffix, '#' ) . ')?' );
1964 if( preg_match( "#([^/\\\\]*?){$encSuffix}[/\\\\]*$#", $path, $matches ) ) {
1972 * Generate a relative path name to the given file.
1973 * May explode on non-matching case-insensitive paths,
1974 * funky symlinks, etc.
1976 * @param string $path Absolute destination path including target filename
1977 * @param string $from Absolute source path, directory only
1980 function wfRelativePath( $path, $from ) {
1981 // Normalize mixed input on Windows...
1982 $path = str_replace( '/', DIRECTORY_SEPARATOR
, $path );
1983 $from = str_replace( '/', DIRECTORY_SEPARATOR
, $from );
1985 // Trim trailing slashes -- fix for drive root
1986 $path = rtrim( $path, DIRECTORY_SEPARATOR
);
1987 $from = rtrim( $from, DIRECTORY_SEPARATOR
);
1989 $pieces = explode( DIRECTORY_SEPARATOR
, dirname( $path ) );
1990 $against = explode( DIRECTORY_SEPARATOR
, $from );
1992 if( $pieces[0] !== $against[0] ) {
1993 // Non-matching Windows drive letters?
1994 // Return a full path.
1998 // Trim off common prefix
1999 while( count( $pieces ) && count( $against )
2000 && $pieces[0] == $against[0] ) {
2001 array_shift( $pieces );
2002 array_shift( $against );
2005 // relative dots to bump us to the parent
2006 while( count( $against ) ) {
2007 array_unshift( $pieces, '..' );
2008 array_shift( $against );
2011 array_push( $pieces, wfBaseName( $path ) );
2013 return implode( DIRECTORY_SEPARATOR
, $pieces );
2017 * array_merge() does awful things with "numeric" indexes, including
2018 * string indexes when happen to look like integers. When we want
2019 * to merge arrays with arbitrary string indexes, we don't want our
2020 * arrays to be randomly corrupted just because some of them consist
2023 * Fuck you, PHP. Fuck you in the ear!
2025 * @param array $array1, [$array2, [...]]
2028 function wfArrayMerge( $array1/* ... */ ) {
2030 for( $i = 1; $i < func_num_args(); $i++
) {
2031 foreach( func_get_arg( $i ) as $key => $value ) {
2032 $out[$key] = $value;
2039 * Make a URL index, appropriate for the el_index field of externallinks.
2041 function wfMakeUrlIndex( $url ) {
2042 global $wgUrlProtocols; // Allow all protocols defined in DefaultSettings/LocalSettings.php
2043 wfSuppressWarnings();
2044 $bits = parse_url( $url );
2045 wfRestoreWarnings();
2049 // most of the protocols are followed by ://, but mailto: and sometimes news: not, check for it
2051 if ( in_array( $bits['scheme'] . '://' , $wgUrlProtocols ) ) {
2053 } elseif ( in_array( $bits['scheme'] .':' , $wgUrlProtocols ) ) {
2055 // parse_url detects for news: and mailto: the host part of an url as path
2056 // We have to correct this wrong detection
2057 if ( isset ( $bits['path'] ) ) {
2058 $bits['host'] = $bits['path'];
2065 // Reverse the labels in the hostname, convert to lower case
2066 // For emails reverse domainpart only
2067 if ( $bits['scheme'] == 'mailto' ) {
2068 $mailparts = explode( '@', $bits['host'], 2 );
2069 if ( count($mailparts) === 2 ) {
2070 $domainpart = strtolower( implode( '.', array_reverse( explode( '.', $mailparts[1] ) ) ) );
2072 // No domain specified, don't mangle it
2075 $reversedHost = $domainpart . '@' . $mailparts[0];
2077 $reversedHost = strtolower( implode( '.', array_reverse( explode( '.', $bits['host'] ) ) ) );
2079 // Add an extra dot to the end
2080 // Why? Is it in wrong place in mailto links?
2081 if ( substr( $reversedHost, -1, 1 ) !== '.' ) {
2082 $reversedHost .= '.';
2084 // Reconstruct the pseudo-URL
2085 $prot = $bits['scheme'];
2086 $index = "$prot$delimiter$reversedHost";
2087 // Leave out user and password. Add the port, path, query and fragment
2088 if ( isset( $bits['port'] ) ) $index .= ':' . $bits['port'];
2089 if ( isset( $bits['path'] ) ) {
2090 $index .= $bits['path'];
2094 if ( isset( $bits['query'] ) ) $index .= '?' . $bits['query'];
2095 if ( isset( $bits['fragment'] ) ) $index .= '#' . $bits['fragment'];
2100 * Do any deferred updates and clear the list
2101 * TODO: This could be in Wiki.php if that class made any sense at all
2103 function wfDoUpdates()
2105 global $wgPostCommitUpdateList, $wgDeferredUpdateList;
2106 foreach ( $wgDeferredUpdateList as $update ) {
2107 $update->doUpdate();
2109 foreach ( $wgPostCommitUpdateList as $update ) {
2110 $update->doUpdate();
2112 $wgDeferredUpdateList = array();
2113 $wgPostCommitUpdateList = array();
2117 * @deprecated use StringUtils::explodeMarkup
2119 function wfExplodeMarkup( $separator, $text ) {
2120 return StringUtils
::explodeMarkup( $separator, $text );
2124 * Convert an arbitrarily-long digit string from one numeric base
2125 * to another, optionally zero-padding to a minimum column width.
2127 * Supports base 2 through 36; digit values 10-36 are represented
2128 * as lowercase letters a-z. Input is case-insensitive.
2130 * @param $input string of digits
2131 * @param $sourceBase int 2-36
2132 * @param $destBase int 2-36
2133 * @param $pad int 1 or greater
2134 * @param $lowercase bool
2135 * @return string or false on invalid input
2137 function wfBaseConvert( $input, $sourceBase, $destBase, $pad=1, $lowercase=true ) {
2138 $input = strval( $input );
2139 if( $sourceBase < 2 ||
2144 $sourceBase != intval( $sourceBase ) ||
2145 $destBase != intval( $destBase ) ||
2146 $pad != intval( $pad ) ||
2147 !is_string( $input ) ||
2151 $digitChars = ( $lowercase ) ?
'0123456789abcdefghijklmnopqrstuvwxyz' : '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
2152 $inDigits = array();
2155 // Decode and validate input string
2156 $input = strtolower( $input );
2157 for( $i = 0; $i < strlen( $input ); $i++
) {
2158 $n = strpos( $digitChars, $input{$i} );
2159 if( $n === false ||
$n > $sourceBase ) {
2165 // Iterate over the input, modulo-ing out an output digit
2166 // at a time until input is gone.
2167 while( count( $inDigits ) ) {
2169 $workDigits = array();
2172 foreach( $inDigits as $digit ) {
2173 $work *= $sourceBase;
2176 if( $work < $destBase ) {
2177 // Gonna need to pull another digit.
2178 if( count( $workDigits ) ) {
2179 // Avoid zero-padding; this lets us find
2180 // the end of the input very easily when
2181 // length drops to zero.
2185 // Finally! Actual division!
2186 $workDigits[] = intval( $work / $destBase );
2188 // Isn't it annoying that most programming languages
2189 // don't have a single divide-and-remainder operator,
2190 // even though the CPU implements it that way?
2191 $work = $work %
$destBase;
2195 // All that division leaves us with a remainder,
2196 // which is conveniently our next output digit.
2197 $outChars .= $digitChars[$work];
2200 $inDigits = $workDigits;
2203 while( strlen( $outChars ) < $pad ) {
2207 return strrev( $outChars );
2211 * Create an object with a given name and an array of construct parameters
2212 * @param string $name
2213 * @param array $p parameters
2215 function wfCreateObject( $name, $p ){
2216 $p = array_values( $p );
2217 switch ( count( $p ) ) {
2221 return new $name( $p[0] );
2223 return new $name( $p[0], $p[1] );
2225 return new $name( $p[0], $p[1], $p[2] );
2227 return new $name( $p[0], $p[1], $p[2], $p[3] );
2229 return new $name( $p[0], $p[1], $p[2], $p[3], $p[4] );
2231 return new $name( $p[0], $p[1], $p[2], $p[3], $p[4], $p[5] );
2233 throw new MWException( "Too many arguments to construtor in wfCreateObject" );
2238 * Aliases for modularized functions
2240 function wfGetHTTP( $url, $timeout = 'default' ) {
2241 return Http
::get( $url, $timeout );
2243 function wfIsLocalURL( $url ) {
2244 return Http
::isLocalURL( $url );
2247 function wfHttpOnlySafe() {
2248 global $wgHttpOnlyBlacklist;
2249 if( !version_compare("5.2", PHP_VERSION
, "<") )
2252 if( isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
2253 foreach( $wgHttpOnlyBlacklist as $regex ) {
2254 if( preg_match( $regex, $_SERVER['HTTP_USER_AGENT'] ) ) {
2264 * Initialise php session
2266 function wfSetupSession() {
2267 global $wgSessionsInMemcached, $wgCookiePath, $wgCookieDomain, $wgCookieSecure, $wgCookieHttpOnly;
2268 if( $wgSessionsInMemcached ) {
2269 require_once( 'MemcachedSessions.php' );
2270 } elseif( 'files' != ini_get( 'session.save_handler' ) ) {
2271 # If it's left on 'user' or another setting from another
2272 # application, it will end up failing. Try to recover.
2273 ini_set ( 'session.save_handler', 'files' );
2275 $httpOnlySafe = wfHttpOnlySafe();
2276 wfDebugLog( 'cookie',
2277 'session_set_cookie_params: "' . implode( '", "',
2283 $httpOnlySafe && $wgCookieHttpOnly ) ) . '"' );
2284 if( $httpOnlySafe && $wgCookieHttpOnly ) {
2285 session_set_cookie_params( 0, $wgCookiePath, $wgCookieDomain, $wgCookieSecure, $wgCookieHttpOnly );
2287 // PHP 5.1 throws warnings if you pass the HttpOnly parameter for 5.2.
2288 session_set_cookie_params( 0, $wgCookiePath, $wgCookieDomain, $wgCookieSecure );
2290 session_cache_limiter( 'private, must-revalidate' );
2291 wfSuppressWarnings();
2293 wfRestoreWarnings();
2297 * Get an object from the precompiled serialized directory
2299 * @return mixed The variable on success, false on failure
2301 function wfGetPrecompiledData( $name ) {
2304 $file = "$IP/serialized/$name";
2305 if ( file_exists( $file ) ) {
2306 $blob = file_get_contents( $file );
2308 return unserialize( $blob );
2314 function wfGetCaller( $level = 2 ) {
2315 $backtrace = wfDebugBacktrace();
2316 if ( isset( $backtrace[$level] ) ) {
2317 return wfFormatStackFrame($backtrace[$level]);
2319 $caller = 'unknown';
2324 /** Return a string consisting all callers in stack, somewhat useful sometimes for profiling specific points */
2325 function wfGetAllCallers() {
2326 return implode('/', array_map('wfFormatStackFrame',array_reverse(wfDebugBacktrace())));
2329 /** Return a string representation of frame */
2330 function wfFormatStackFrame($frame) {
2331 return isset( $frame["class"] )?
2332 $frame["class"]."::".$frame["function"]:
2339 function wfMemcKey( /*... */ ) {
2340 $args = func_get_args();
2341 $key = wfWikiID() . ':' . implode( ':', $args );
2345 function wfMemcKeyLang( $key, $code ) {
2346 if ( !is_string($code) ) {
2349 return $key . ';L:' . $code;
2354 * Get a cache key for a foreign DB
2356 function wfForeignMemcKey( $db, $prefix /*, ... */ ) {
2357 $args = array_slice( func_get_args(), 2 );
2359 $key = "$db-$prefix:" . implode( ':', $args );
2361 $key = $db . ':' . implode( ':', $args );
2367 * Get an ASCII string identifying this wiki
2368 * This is used as a prefix in memcached keys
2370 function wfWikiID( $db = null ) {
2371 if( $db instanceof Database
) {
2372 return $db->getWikiID();
2374 global $wgDBprefix, $wgDBname;
2375 if ( $wgDBprefix ) {
2376 return "$wgDBname-$wgDBprefix";
2384 * Split a wiki ID into DB name and table prefix
2386 function wfSplitWikiID( $wiki ) {
2387 $bits = explode( '-', $wiki, 2 );
2388 if ( count( $bits ) < 2 ) {
2395 * Get a Database object.
2396 * @param integer $db Index of the connection to get. May be DB_MASTER for the
2397 * master (for write queries), DB_SLAVE for potentially lagged
2398 * read queries, or an integer >= 0 for a particular server.
2400 * @param mixed $groups Query groups. An array of group names that this query
2401 * belongs to. May contain a single string if the query is only
2404 * @param string $wiki The wiki ID, or false for the current wiki
2406 * Note: multiple calls to wfGetDB(DB_SLAVE) during the course of one request
2407 * will always return the same object, unless the underlying connection or load
2408 * balancer is manually destroyed.
2410 function &wfGetDB( $db = DB_LAST
, $groups = array(), $wiki = false ) {
2411 return wfGetLB( $wiki )->getConnection( $db, $groups, $wiki );
2415 * Get a load balancer object.
2417 * @param array $groups List of query groups
2418 * @param string $wiki Wiki ID, or false for the current wiki
2419 * @return LoadBalancer
2421 function wfGetLB( $wiki = false ) {
2422 return wfGetLBFactory()->getMainLB( $wiki );
2426 * Get the load balancer factory object
2428 function &wfGetLBFactory() {
2429 return LBFactory
::singleton();
2434 * Shortcut for RepoGroup::singleton()->findFile()
2435 * @param mixed $title Title object or string. May be interwiki.
2436 * @param mixed $time Requested time for an archived image, or false for the
2437 * current version. An image object will be returned which
2438 * was created at the specified time.
2439 * @param mixed $flags FileRepo::FIND_ flags
2440 * @return File, or false if the file does not exist
2442 function wfFindFile( $title, $time = false, $flags = 0 ) {
2443 return RepoGroup
::singleton()->findFile( $title, $time, $flags );
2447 * Get an object referring to a locally registered file.
2448 * Returns a valid placeholder object if the file does not exist.
2450 function wfLocalFile( $title ) {
2451 return RepoGroup
::singleton()->getLocalRepo()->newFile( $title );
2455 * Should low-performance queries be disabled?
2459 function wfQueriesMustScale() {
2460 global $wgMiserMode;
2462 ||
( SiteStats
::pages() > 100000
2463 && SiteStats
::edits() > 1000000
2464 && SiteStats
::users() > 10000 );
2468 * Get the path to a specified script file, respecting file
2469 * extensions; this is a wrapper around $wgScriptExtension etc.
2471 * @param string $script Script filename, sans extension
2474 function wfScript( $script = 'index' ) {
2475 global $wgScriptPath, $wgScriptExtension;
2476 return "{$wgScriptPath}/{$script}{$wgScriptExtension}";
2480 * Convenience function converts boolean values into "true"
2481 * or "false" (string) values
2483 * @param bool $value
2486 function wfBoolToStr( $value ) {
2487 return $value ?
'true' : 'false';
2491 * Load an extension messages file
2493 * @param string $extensionName Name of extension to load messages from\for.
2494 * @param string $langcode Language to load messages for, or false for default
2495 * behvaiour (en, content language and user language).
2497 function wfLoadExtensionMessages( $extensionName, $langcode = false ) {
2498 global $wgExtensionMessagesFiles, $wgMessageCache, $wgLang, $wgContLang;
2500 #For recording whether extension message files have been loaded in a given language.
2501 static $loaded = array();
2503 if( !array_key_exists( $extensionName, $loaded ) ) {
2504 $loaded[$extensionName] = array();
2507 if( !$langcode && !array_key_exists( '*', $loaded[$extensionName] ) ) {
2508 # Just do en, content language and user language.
2509 $wgMessageCache->loadMessagesFile( $wgExtensionMessagesFiles[$extensionName], false );
2510 # Mark that they have been loaded.
2511 $loaded[$extensionName]['en'] = true;
2512 $loaded[$extensionName][$wgLang->getCode()] = true;
2513 $loaded[$extensionName][$wgContLang->getCode()] = true;
2514 # Mark that this part has been done to avoid weird if statements.
2515 $loaded[$extensionName]['*'] = true;
2516 } elseif( is_string( $langcode ) && !array_key_exists( $langcode, $loaded[$extensionName] ) ) {
2517 # Load messages for specified language.
2518 $wgMessageCache->loadMessagesFile( $wgExtensionMessagesFiles[$extensionName], $langcode );
2519 # Mark that they have been loaded.
2520 $loaded[$extensionName][$langcode] = true;
2525 * Get a platform-independent path to the null file, e.g.
2530 function wfGetNull() {
2531 return wfIsWindows()
2537 * Displays a maxlag error
2539 * @param string $host Server that lags the most
2540 * @param int $lag Maxlag (actual)
2541 * @param int $maxLag Maxlag (requested)
2543 function wfMaxlagError( $host, $lag, $maxLag ) {
2544 global $wgShowHostnames;
2545 header( 'HTTP/1.1 503 Service Unavailable' );
2546 header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
2547 header( 'X-Database-Lag: ' . intval( $lag ) );
2548 header( 'Content-Type: text/plain' );
2549 if( $wgShowHostnames ) {
2550 echo "Waiting for $host: $lag seconds lagged\n";
2552 echo "Waiting for a database server: $lag seconds lagged\n";
2557 * Throws an E_USER_NOTICE saying that $function is deprecated
2558 * @param string $function
2561 function wfDeprecated( $function ) {
2562 global $wgDebugLogFile;
2563 if ( !$wgDebugLogFile ) {
2566 $callers = wfDebugBacktrace();
2567 if( isset( $callers[2] ) ){
2568 $callerfunc = $callers[2];
2569 $callerfile = $callers[1];
2570 if( isset( $callerfile['file'] ) && isset( $callerfile['line'] ) ){
2571 $file = $callerfile['file'] . ' at line ' . $callerfile['line'];
2573 $file = '(internal function)';
2576 if( isset( $callerfunc['class'] ) )
2577 $func .= $callerfunc['class'] . '::';
2578 $func .= @$callerfunc['function'];
2579 $msg = "Use of $function is deprecated. Called from $func in $file";
2581 $msg = "Use of $function is deprecated.";
2583 wfDebug( "$msg\n" );
2587 * Sleep until the worst slave's replication lag is less than or equal to
2588 * $maxLag, in seconds. Use this when updating very large numbers of rows, as
2589 * in maintenance scripts, to avoid causing too much lag. Of course, this is
2590 * a no-op if there are no slaves.
2592 * Every time the function has to wait for a slave, it will print a message to
2593 * that effect (and then sleep for a little while), so it's probably not best
2594 * to use this outside maintenance scripts in its present form.
2596 * @param int $maxLag
2599 function wfWaitForSlaves( $maxLag ) {
2602 list( $host, $lag ) = $lb->getMaxLag();
2603 while( $lag > $maxLag ) {
2604 $name = @gethostbyaddr
( $host );
2605 if( $name !== false ) {
2608 print "Waiting for $host (lagged $lag seconds)...\n";
2610 list( $host, $lag ) = $lb->getMaxLag();
2615 /** Generate a random 32-character hexadecimal token.
2616 * @param mixed $salt Some sort of salt, if necessary, to add to random characters before hashing.
2618 function wfGenerateToken( $salt = '' ) {
2619 $salt = serialize($salt);
2621 return md5( mt_rand( 0, 0x7fffffff ) . $salt );