xref: /dokuwiki/inc/io.php (revision 5a8d6e48ea57255f66cd0126355f1b73f1000de9) 
1<?php
2/**
3 * File IO functions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9use dokuwiki\HTTP\DokuHTTPClient;
10
11/**
12 * Removes empty directories
13 *
14 * Sends IO_NAMESPACE_DELETED events for 'pages' and 'media' namespaces.
15 * Event data:
16 * $data[0]    ns: The colon separated namespace path minus the trailing page name.
17 * $data[1]    ns_type: 'pages' or 'media' namespace tree.
18 *
19 * @param string $id      - a pageid, the namespace of that id will be tried to deleted
20 * @param string $basedir - the config name of the type to delete (datadir or mediadir usally)
21 * @return bool - true if at least one namespace was deleted
22 *
23 * @author  Andreas Gohr <andi@splitbrain.org>
24 * @author Ben Coburn <btcoburn@silicodon.net>
25 */
26function io_sweepNS($id,$basedir='datadir'){
27    global $conf;
28    $types = array ('datadir'=>'pages', 'mediadir'=>'media');
29    $ns_type = (isset($types[$basedir])?$types[$basedir]:false);
30
31    $delone = false;
32
33    //scan all namespaces
34    while(($id = getNS($id)) !== false){
35        $dir = $conf[$basedir].'/'.utf8_encodeFN(str_replace(':','/',$id));
36
37        //try to delete dir else return
38        if(@rmdir($dir)) {
39            if ($ns_type!==false) {
40                $data = array($id, $ns_type);
41                $delone = true; // we deleted at least one dir
42                trigger_event('IO_NAMESPACE_DELETED', $data);
43            }
44        } else { return $delone; }
45    }
46    return $delone;
47}
48
49/**
50 * Used to read in a DokuWiki page from file, and send IO_WIKIPAGE_READ events.
51 *
52 * Generates the action event which delegates to io_readFile().
53 * Action plugins are allowed to modify the page content in transit.
54 * The file path should not be changed.
55 *
56 * Event data:
57 * $data[0]    The raw arguments for io_readFile as an array.
58 * $data[1]    ns: The colon separated namespace path minus the trailing page name. (false if root ns)
59 * $data[2]    page_name: The wiki page name.
60 * $data[3]    rev: The page revision, false for current wiki pages.
61 *
62 * @author Ben Coburn <btcoburn@silicodon.net>
63 *
64 * @param string   $file filename
65 * @param string   $id page id
66 * @param bool|int $rev revision timestamp
67 * @return string
68 */
69function io_readWikiPage($file, $id, $rev=false) {
70    if (empty($rev)) { $rev = false; }
71    $data = array(array($file, true), getNS($id), noNS($id), $rev);
72    return trigger_event('IO_WIKIPAGE_READ', $data, '_io_readWikiPage_action', false);
73}
74
75/**
76 * Callback adapter for io_readFile().
77 *
78 * @author Ben Coburn <btcoburn@silicodon.net>
79 *
80 * @param array $data event data
81 * @return string
82 */
83function _io_readWikiPage_action($data) {
84    if (is_array($data) && is_array($data[0]) && count($data[0])===2) {
85        return call_user_func_array('io_readFile', $data[0]);
86    } else {
87        return ''; //callback error
88    }
89}
90
91/**
92 * Returns content of $file as cleaned string.
93 *
94 * Uses gzip if extension is .gz
95 *
96 * If you want to use the returned value in unserialize
97 * be sure to set $clean to false!
98 *
99 * @author  Andreas Gohr <andi@splitbrain.org>
100 *
101 * @param string $file  filename
102 * @param bool   $clean
103 * @return string|bool the file contents or false on error
104 */
105function io_readFile($file,$clean=true){
106    $ret = '';
107    if(file_exists($file)){
108        if(substr($file,-3) == '.gz'){
109            if(!DOKU_HAS_GZIP) return false;
110            $ret = gzfile($file);
111            if(is_array($ret)) $ret = join('', $ret);
112        }else if(substr($file,-4) == '.bz2'){
113            if(!DOKU_HAS_BZIP) return false;
114            $ret = bzfile($file);
115        }else{
116            $ret = file_get_contents($file);
117        }
118    }
119    if($ret === null) return false;
120    if($ret !== false && $clean){
121        return cleanText($ret);
122    }else{
123        return $ret;
124    }
125}
126/**
127 * Returns the content of a .bz2 compressed file as string
128 *
129 * @author marcel senf <marcel@rucksackreinigung.de>
130 * @author  Andreas Gohr <andi@splitbrain.org>
131 *
132 * @param string $file filename
133 * @param bool   $array return array of lines
134 * @return string|array|bool content or false on error
135 */
136function bzfile($file, $array=false) {
137    $bz = bzopen($file,"r");
138    if($bz === false) return false;
139
140    if($array) $lines = array();
141    $str = '';
142    while (!feof($bz)) {
143        //8192 seems to be the maximum buffersize?
144        $buffer = bzread($bz,8192);
145        if(($buffer === false) || (bzerrno($bz) !== 0)) {
146            return false;
147        }
148        $str = $str . $buffer;
149        if($array) {
150            $pos = strpos($str, "\n");
151            while($pos !== false) {
152                $lines[] = substr($str, 0, $pos+1);
153                $str = substr($str, $pos+1);
154                $pos = strpos($str, "\n");
155            }
156        }
157    }
158    bzclose($bz);
159    if($array) {
160        if($str !== '') $lines[] = $str;
161        return $lines;
162    }
163    return $str;
164}
165
166/**
167 * Used to write out a DokuWiki page to file, and send IO_WIKIPAGE_WRITE events.
168 *
169 * This generates an action event and delegates to io_saveFile().
170 * Action plugins are allowed to modify the page content in transit.
171 * The file path should not be changed.
172 * (The append parameter is set to false.)
173 *
174 * Event data:
175 * $data[0]    The raw arguments for io_saveFile as an array.
176 * $data[1]    ns: The colon separated namespace path minus the trailing page name. (false if root ns)
177 * $data[2]    page_name: The wiki page name.
178 * $data[3]    rev: The page revision, false for current wiki pages.
179 *
180 * @author Ben Coburn <btcoburn@silicodon.net>
181 *
182 * @param string $file      filename
183 * @param string $content
184 * @param string $id        page id
185 * @param int|bool $rev timestamp of revision
186 * @return bool
187 */
188function io_writeWikiPage($file, $content, $id, $rev=false) {
189    if (empty($rev)) { $rev = false; }
190    if ($rev===false) { io_createNamespace($id); } // create namespaces as needed
191    $data = array(array($file, $content, false), getNS($id), noNS($id), $rev);
192    return trigger_event('IO_WIKIPAGE_WRITE', $data, '_io_writeWikiPage_action', false);
193}
194
195/**
196 * Callback adapter for io_saveFile().
197 * @author Ben Coburn <btcoburn@silicodon.net>
198 *
199 * @param array $data event data
200 * @return bool
201 */
202function _io_writeWikiPage_action($data) {
203    if (is_array($data) && is_array($data[0]) && count($data[0])===3) {
204        $ok = call_user_func_array('io_saveFile', $data[0]);
205        // for attic files make sure the file has the mtime of the revision
206        if($ok && is_int($data[3]) && $data[3] > 0) {
207            @touch($data[0][0], $data[3]);
208        }
209        return $ok;
210    } else {
211        return false; //callback error
212    }
213}
214
215/**
216 * Internal function to save contents to a file.
217 *
218 * @author  Andreas Gohr <andi@splitbrain.org>
219 *
220 * @param string $file filename path to file
221 * @param string $content
222 * @param bool   $append
223 * @return bool true on success, otherwise false
224 */
225function _io_saveFile($file, $content, $append) {
226    global $conf;
227    $mode = ($append) ? 'ab' : 'wb';
228    $fileexists = file_exists($file);
229
230    if(substr($file,-3) == '.gz'){
231        if(!DOKU_HAS_GZIP) return false;
232        $fh = @gzopen($file,$mode.'9');
233        if(!$fh) return false;
234        gzwrite($fh, $content);
235        gzclose($fh);
236    }else if(substr($file,-4) == '.bz2'){
237        if(!DOKU_HAS_BZIP) return false;
238        if($append) {
239            $bzcontent = bzfile($file);
240            if($bzcontent === false) return false;
241            $content = $bzcontent.$content;
242        }
243        $fh = @bzopen($file,'w');
244        if(!$fh) return false;
245        bzwrite($fh, $content);
246        bzclose($fh);
247    }else{
248        $fh = @fopen($file,$mode);
249        if(!$fh) return false;
250        fwrite($fh, $content);
251        fclose($fh);
252    }
253
254    if(!$fileexists and !empty($conf['fperm'])) chmod($file, $conf['fperm']);
255    return true;
256}
257
258/**
259 * Saves $content to $file.
260 *
261 * If the third parameter is set to true the given content
262 * will be appended.
263 *
264 * Uses gzip if extension is .gz
265 * and bz2 if extension is .bz2
266 *
267 * @author  Andreas Gohr <andi@splitbrain.org>
268 *
269 * @param string $file filename path to file
270 * @param string $content
271 * @param bool   $append
272 * @return bool true on success, otherwise false
273 */
274function io_saveFile($file, $content, $append=false) {
275    io_makeFileDir($file);
276    io_lock($file);
277    if(!_io_saveFile($file, $content, $append)) {
278        msg("Writing $file failed",-1);
279        io_unlock($file);
280        return false;
281    }
282    io_unlock($file);
283    return true;
284}
285
286/**
287 * Replace one or more occurrences of a line in a file.
288 *
289 * The default, when $maxlines is 0 is to delete all matching lines then append a single line.
290 * A regex that matches any part of the line will remove the entire line in this mode.
291 * Captures in $newline are not available.
292 *
293 * Otherwise each line is matched and replaced individually, up to the first $maxlines lines
294 * or all lines if $maxlines is -1. If $regex is true then captures can be used in $newline.
295 *
296 * Be sure to include the trailing newline in $oldline when replacing entire lines.
297 *
298 * Uses gzip if extension is .gz
299 * and bz2 if extension is .bz2
300 *
301 * @author Steven Danz <steven-danz@kc.rr.com>
302 * @author Christopher Smith <chris@jalakai.co.uk>
303 * @author Patrick Brown <ptbrown@whoopdedo.org>
304 *
305 * @param string $file     filename
306 * @param string $oldline  exact linematch to remove
307 * @param string $newline  new line to insert
308 * @param bool   $regex    use regexp?
309 * @param int    $maxlines number of occurrences of the line to replace
310 * @return bool true on success
311 */
312function io_replaceInFile($file, $oldline, $newline, $regex=false, $maxlines=0) {
313    if ((string)$oldline === '') {
314        trigger_error('$oldline parameter cannot be empty in io_replaceInFile()', E_USER_WARNING);
315        return false;
316    }
317
318    if (!file_exists($file)) return true;
319
320    io_lock($file);
321
322    // load into array
323    if(substr($file,-3) == '.gz'){
324        if(!DOKU_HAS_GZIP) return false;
325        $lines = gzfile($file);
326    }else if(substr($file,-4) == '.bz2'){
327        if(!DOKU_HAS_BZIP) return false;
328        $lines = bzfile($file, true);
329    }else{
330        $lines = file($file);
331    }
332
333    // make non-regexes into regexes
334    $pattern = $regex ? $oldline : '/^'.preg_quote($oldline,'/').'$/';
335    $replace = $regex ? $newline : addcslashes($newline, '\$');
336
337    // remove matching lines
338    if ($maxlines > 0) {
339        $count = 0;
340        $matched = 0;
341        foreach($lines as $i => $line) {
342            if($count >= $maxlines) break;
343            // $matched will be set to 0|1 depending on whether pattern is matched and line replaced
344            $lines[$i] = preg_replace($pattern, $replace, $line, -1, $matched);
345            if ($matched) $count++;
346        }
347    } else if ($maxlines == 0) {
348        $lines = preg_grep($pattern, $lines, PREG_GREP_INVERT);
349
350        if ((string)$newline !== ''){
351            $lines[] = $newline;
352        }
353    } else {
354        $lines = preg_replace($pattern, $replace, $lines);
355    }
356
357    if(count($lines)){
358        if(!_io_saveFile($file, join('',$lines), false)) {
359            msg("Removing content from $file failed",-1);
360            io_unlock($file);
361            return false;
362        }
363    }else{
364        @unlink($file);
365    }
366
367    io_unlock($file);
368    return true;
369}
370
371/**
372 * Delete lines that match $badline from $file.
373 *
374 * Be sure to include the trailing newline in $badline
375 *
376 * @author Patrick Brown <ptbrown@whoopdedo.org>
377 *
378 * @param string $file    filename
379 * @param string $badline exact linematch to remove
380 * @param bool   $regex   use regexp?
381 * @return bool true on success
382 */
383function io_deleteFromFile($file,$badline,$regex=false){
384    return io_replaceInFile($file,$badline,null,$regex,0);
385}
386
387/**
388 * Tries to lock a file
389 *
390 * Locking is only done for io_savefile and uses directories
391 * inside $conf['lockdir']
392 *
393 * It waits maximal 3 seconds for the lock, after this time
394 * the lock is assumed to be stale and the function goes on
395 *
396 * @author Andreas Gohr <andi@splitbrain.org>
397 *
398 * @param string $file filename
399 */
400function io_lock($file){
401    global $conf;
402
403    $lockDir = $conf['lockdir'].'/'.md5($file);
404    @ignore_user_abort(1);
405
406    $timeStart = time();
407    do {
408        //waited longer than 3 seconds? -> stale lock
409        if ((time() - $timeStart) > 3) break;
410        $locked = @mkdir($lockDir, $conf['dmode']);
411        if($locked){
412            if(!empty($conf['dperm'])) chmod($lockDir, $conf['dperm']);
413            break;
414        }
415        usleep(50);
416    } while ($locked === false);
417}
418
419/**
420 * Unlocks a file
421 *
422 * @author Andreas Gohr <andi@splitbrain.org>
423 *
424 * @param string $file filename
425 */
426function io_unlock($file){
427    global $conf;
428
429    $lockDir = $conf['lockdir'].'/'.md5($file);
430    @rmdir($lockDir);
431    @ignore_user_abort(0);
432}
433
434/**
435 * Create missing namespace directories and send the IO_NAMESPACE_CREATED events
436 * in the order of directory creation. (Parent directories first.)
437 *
438 * Event data:
439 * $data[0]    ns: The colon separated namespace path minus the trailing page name.
440 * $data[1]    ns_type: 'pages' or 'media' namespace tree.
441 *
442 * @author Ben Coburn <btcoburn@silicodon.net>
443 *
444 * @param string $id page id
445 * @param string $ns_type 'pages' or 'media'
446 */
447function io_createNamespace($id, $ns_type='pages') {
448    // verify ns_type
449    $types = array('pages'=>'wikiFN', 'media'=>'mediaFN');
450    if (!isset($types[$ns_type])) {
451        trigger_error('Bad $ns_type parameter for io_createNamespace().');
452        return;
453    }
454    // make event list
455    $missing = array();
456    $ns_stack = explode(':', $id);
457    $ns = $id;
458    $tmp = dirname( $file = call_user_func($types[$ns_type], $ns) );
459    while (!@is_dir($tmp) && !(file_exists($tmp) && !is_dir($tmp))) {
460        array_pop($ns_stack);
461        $ns = implode(':', $ns_stack);
462        if (strlen($ns)==0) { break; }
463        $missing[] = $ns;
464        $tmp = dirname(call_user_func($types[$ns_type], $ns));
465    }
466    // make directories
467    io_makeFileDir($file);
468    // send the events
469    $missing = array_reverse($missing); // inside out
470    foreach ($missing as $ns) {
471        $data = array($ns, $ns_type);
472        trigger_event('IO_NAMESPACE_CREATED', $data);
473    }
474}
475
476/**
477 * Create the directory needed for the given file
478 *
479 * @author  Andreas Gohr <andi@splitbrain.org>
480 *
481 * @param string $file file name
482 */
483function io_makeFileDir($file){
484    $dir = dirname($file);
485    if(!@is_dir($dir)){
486        io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
487    }
488}
489
490/**
491 * Creates a directory hierachy.
492 *
493 * @link    http://php.net/manual/en/function.mkdir.php
494 * @author  <saint@corenova.com>
495 * @author  Andreas Gohr <andi@splitbrain.org>
496 *
497 * @param string $target filename
498 * @return bool|int|string
499 */
500function io_mkdir_p($target){
501    global $conf;
502    if (@is_dir($target)||empty($target)) return 1; // best case check first
503    if (file_exists($target) && !is_dir($target)) return 0;
504    //recursion
505    if (io_mkdir_p(substr($target,0,strrpos($target,'/')))){
506        $ret = @mkdir($target,$conf['dmode']); // crawl back up & create dir tree
507        if($ret && !empty($conf['dperm'])) chmod($target, $conf['dperm']);
508        return $ret;
509    }
510    return 0;
511}
512
513/**
514 * Recursively delete a directory
515 *
516 * @author Andreas Gohr <andi@splitbrain.org>
517 * @param string $path
518 * @param bool   $removefiles defaults to false which will delete empty directories only
519 * @return bool
520 */
521function io_rmdir($path, $removefiles = false) {
522    if(!is_string($path) || $path == "") return false;
523    if(!file_exists($path)) return true; // it's already gone or was never there, count as success
524
525    if(is_dir($path) && !is_link($path)) {
526        $dirs  = array();
527        $files = array();
528
529        if(!$dh = @opendir($path)) return false;
530        while(false !== ($f = readdir($dh))) {
531            if($f == '..' || $f == '.') continue;
532
533            // collect dirs and files first
534            if(is_dir("$path/$f") && !is_link("$path/$f")) {
535                $dirs[] = "$path/$f";
536            } else if($removefiles) {
537                $files[] = "$path/$f";
538            } else {
539                return false; // abort when non empty
540            }
541
542        }
543        closedir($dh);
544
545        // now traverse into  directories first
546        foreach($dirs as $dir) {
547            if(!io_rmdir($dir, $removefiles)) return false; // abort on any error
548        }
549
550        // now delete files
551        foreach($files as $file) {
552            if(!@unlink($file)) return false; //abort on any error
553        }
554
555        // remove self
556        return @rmdir($path);
557    } else if($removefiles) {
558        return @unlink($path);
559    }
560    return false;
561}
562
563/**
564 * Creates a unique temporary directory and returns
565 * its path.
566 *
567 * @author Michael Klier <chi@chimeric.de>
568 *
569 * @return false|string path to new directory or false
570 */
571function io_mktmpdir() {
572    global $conf;
573
574    $base = $conf['tmpdir'];
575    $dir  = md5(uniqid(mt_rand(), true));
576    $tmpdir = $base.'/'.$dir;
577
578    if(io_mkdir_p($tmpdir)) {
579        return($tmpdir);
580    } else {
581        return false;
582    }
583}
584
585/**
586 * downloads a file from the net and saves it
587 *
588 * if $useAttachment is false,
589 * - $file is the full filename to save the file, incl. path
590 * - if successful will return true, false otherwise
591 *
592 * if $useAttachment is true,
593 * - $file is the directory where the file should be saved
594 * - if successful will return the name used for the saved file, false otherwise
595 *
596 * @author Andreas Gohr <andi@splitbrain.org>
597 * @author Chris Smith <chris@jalakai.co.uk>
598 *
599 * @param string $url           url to download
600 * @param string $file          path to file or directory where to save
601 * @param bool   $useAttachment true: try to use name of download, uses otherwise $defaultName
602 *                              false: uses $file as path to file
603 * @param string $defaultName   fallback for if using $useAttachment
604 * @param int    $maxSize       maximum file size
605 * @return bool|string          if failed false, otherwise true or the name of the file in the given dir
606 */
607function io_download($url,$file,$useAttachment=false,$defaultName='',$maxSize=2097152){
608    global $conf;
609    $http = new DokuHTTPClient();
610    $http->max_bodysize = $maxSize;
611    $http->timeout = 25; //max. 25 sec
612    $http->keep_alive = false; // we do single ops here, no need for keep-alive
613
614    $data = $http->get($url);
615    if(!$data) return false;
616
617    $name = '';
618    if ($useAttachment) {
619        if (isset($http->resp_headers['content-disposition'])) {
620            $content_disposition = $http->resp_headers['content-disposition'];
621            $match=array();
622            if (is_string($content_disposition) &&
623                    preg_match('/attachment;\s*filename\s*=\s*"([^"]*)"/i', $content_disposition, $match)) {
624
625                $name = utf8_basename($match[1]);
626            }
627
628        }
629
630        if (!$name) {
631            if (!$defaultName) return false;
632            $name = $defaultName;
633        }
634
635        $file = $file.$name;
636    }
637
638    $fileexists = file_exists($file);
639    $fp = @fopen($file,"w");
640    if(!$fp) return false;
641    fwrite($fp,$data);
642    fclose($fp);
643    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
644    if ($useAttachment) return $name;
645    return true;
646}
647
648/**
649 * Windows compatible rename
650 *
651 * rename() can not overwrite existing files on Windows
652 * this function will use copy/unlink instead
653 *
654 * @param string $from
655 * @param string $to
656 * @return bool succes or fail
657 */
658function io_rename($from,$to){
659    global $conf;
660    if(!@rename($from,$to)){
661        if(@copy($from,$to)){
662            if($conf['fperm']) chmod($to, $conf['fperm']);
663            @unlink($from);
664            return true;
665        }
666        return false;
667    }
668    return true;
669}
670
671/**
672 * Runs an external command with input and output pipes.
673 * Returns the exit code from the process.
674 *
675 * @author Tom N Harris <tnharris@whoopdedo.org>
676 *
677 * @param string $cmd
678 * @param string $input  input pipe
679 * @param string $output output pipe
680 * @return int exit code from process
681 */
682function io_exec($cmd, $input, &$output){
683    $descspec = array(
684            0=>array("pipe","r"),
685            1=>array("pipe","w"),
686            2=>array("pipe","w"));
687    $ph = proc_open($cmd, $descspec, $pipes);
688    if(!$ph) return -1;
689    fclose($pipes[2]); // ignore stderr
690    fwrite($pipes[0], $input);
691    fclose($pipes[0]);
692    $output = stream_get_contents($pipes[1]);
693    fclose($pipes[1]);
694    return proc_close($ph);
695}
696
697/**
698 * Search a file for matching lines
699 *
700 * This is probably not faster than file()+preg_grep() but less
701 * memory intensive because not the whole file needs to be loaded
702 * at once.
703 *
704 * @author Andreas Gohr <andi@splitbrain.org>
705 * @param  string $file    The file to search
706 * @param  string $pattern PCRE pattern
707 * @param  int    $max     How many lines to return (0 for all)
708 * @param  bool   $backref When true returns array with backreferences instead of lines
709 * @return array matching lines or backref, false on error
710 */
711function io_grep($file,$pattern,$max=0,$backref=false){
712    $fh = @fopen($file,'r');
713    if(!$fh) return false;
714    $matches = array();
715
716    $cnt  = 0;
717    $line = '';
718    while (!feof($fh)) {
719        $line .= fgets($fh, 4096);  // read full line
720        if(substr($line,-1) != "\n") continue;
721
722        // check if line matches
723        if(preg_match($pattern,$line,$match)){
724            if($backref){
725                $matches[] = $match;
726            }else{
727                $matches[] = $line;
728            }
729            $cnt++;
730        }
731        if($max && $max == $cnt) break;
732        $line = '';
733    }
734    fclose($fh);
735    return $matches;
736}
737
738
739/**
740 * Get size of contents of a file, for a compressed file the uncompressed size
741 * Warning: reading uncompressed size of content of bz-files requires uncompressing
742 *
743 * @author  Gerrit Uitslag <klapinklapin@gmail.com>
744 *
745 * @param string $file filename path to file
746 * @return int size of file
747 */
748function io_getSizeFile($file) {
749    if (!file_exists($file)) return 0;
750
751    if(substr($file,-3) == '.gz'){
752        $fp = @fopen($file, "rb");
753        if($fp === false) return 0;
754
755        fseek($fp, -4, SEEK_END);
756        $buffer = fread($fp, 4);
757        fclose($fp);
758        $array = unpack("V", $buffer);
759        $uncompressedsize = end($array);
760    }else if(substr($file,-4) == '.bz2'){
761        if(!DOKU_HAS_BZIP) return 0;
762
763        $bz = bzopen($file,"r");
764        if($bz === false) return 0;
765
766        $uncompressedsize = 0;
767        while (!feof($bz)) {
768            //8192 seems to be the maximum buffersize?
769            $buffer = bzread($bz,8192);
770            if(($buffer === false) || (bzerrno($bz) !== 0)) {
771                return 0;
772            }
773            $uncompressedsize += strlen($buffer);
774        }
775    }else{
776        $uncompressedsize = filesize($file);
777    }
778
779    return $uncompressedsize;
780 }
781