xref: /dokuwiki/inc/io.php (revision ccc4c71ca88c25bcefb7f42eb01f0c040487e3a9) 
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
9/**
10 * Removes empty directories
11 *
12 * Sends IO_NAMESPACE_DELETED events for 'pages' and 'media' namespaces.
13 * Event data:
14 * $data[0]    ns: The colon separated namespace path minus the trailing page name.
15 * $data[1]    ns_type: 'pages' or 'media' namespace tree.
16 *
17 * @param string $id      - a pageid, the namespace of that id will be tried to deleted
18 * @param string $basedir - the config name of the type to delete (datadir or mediadir usally)
19 * @return bool - true if at least one namespace was deleted
20 *
21 * @author  Andreas Gohr <andi@splitbrain.org>
22 * @author Ben Coburn <btcoburn@silicodon.net>
23 */
24function io_sweepNS($id,$basedir='datadir'){
25    global $conf;
26    $types = array ('datadir'=>'pages', 'mediadir'=>'media');
27    $ns_type = (isset($types[$basedir])?$types[$basedir]:false);
28
29    $delone = false;
30
31    //scan all namespaces
32    while(($id = getNS($id)) !== false){
33        $dir = $conf[$basedir].'/'.utf8_encodeFN(str_replace(':','/',$id));
34
35        //try to delete dir else return
36        if(@rmdir($dir)) {
37            if ($ns_type!==false) {
38                $data = array($id, $ns_type);
39                $delone = true; // we deleted at least one dir
40                trigger_event('IO_NAMESPACE_DELETED', $data);
41            }
42        } else { return $delone; }
43    }
44    return $delone;
45}
46
47/**
48 * Used to read in a DokuWiki page from file, and send IO_WIKIPAGE_READ events.
49 *
50 * Generates the action event which delegates to io_readFile().
51 * Action plugins are allowed to modify the page content in transit.
52 * The file path should not be changed.
53 *
54 * Event data:
55 * $data[0]    The raw arguments for io_readFile as an array.
56 * $data[1]    ns: The colon separated namespace path minus the trailing page name. (false if root ns)
57 * $data[2]    page_name: The wiki page name.
58 * $data[3]    rev: The page revision, false for current wiki pages.
59 *
60 * @author Ben Coburn <btcoburn@silicodon.net>
61 *
62 * @param string   $file filename
63 * @param string   $id page id
64 * @param bool|int $rev revision timestamp
65 * @return string
66 */
67function io_readWikiPage($file, $id, $rev=false) {
68    if (empty($rev)) { $rev = false; }
69    $data = array(array($file, true), getNS($id), noNS($id), $rev);
70    return trigger_event('IO_WIKIPAGE_READ', $data, '_io_readWikiPage_action', false);
71}
72
73/**
74 * Callback adapter for io_readFile().
75 *
76 * @author Ben Coburn <btcoburn@silicodon.net>
77 *
78 * @param array $data event data
79 * @return string
80 */
81function _io_readWikiPage_action($data) {
82    if (is_array($data) && is_array($data[0]) && count($data[0])===2) {
83        return call_user_func_array('io_readFile', $data[0]);
84    } else {
85        return ''; //callback error
86    }
87}
88
89/**
90 * Returns content of $file as cleaned string.
91 *
92 * Uses gzip if extension is .gz
93 *
94 * If you want to use the returned value in unserialize
95 * be sure to set $clean to false!
96 *
97 * @author  Andreas Gohr <andi@splitbrain.org>
98 *
99 * @param string $file  filename
100 * @param bool   $clean
101 * @return string|bool the file contents or false on error
102 */
103function io_readFile($file,$clean=true){
104    $ret = '';
105    if(file_exists($file)){
106        if(substr($file,-3) == '.gz'){
107            if(!DOKU_HAS_GZIP) return false;
108            $ret = gzfile($file);
109            if(is_array($ret)) $ret = join('', $ret);
110        }else if(substr($file,-4) == '.bz2'){
111            if(!DOKU_HAS_BZIP) return false;
112            $ret = bzfile($file);
113        }else{
114            $ret = file_get_contents($file);
115        }
116    }
117    if($ret === null) return false;
118    if($ret !== false && $clean){
119        return cleanText($ret);
120    }else{
121        return $ret;
122    }
123}
124/**
125 * Returns the content of a .bz2 compressed file as string
126 *
127 * @author marcel senf <marcel@rucksackreinigung.de>
128 * @author  Andreas Gohr <andi@splitbrain.org>
129 *
130 * @param string $file filename
131 * @param bool   $array return array of lines
132 * @return string|array|bool content or false on error
133 */
134function bzfile($file, $array=false) {
135    $bz = bzopen($file,"r");
136    if($bz === false) return false;
137
138    if($array) $lines = array();
139    $str = '';
140    while (!feof($bz)) {
141        //8192 seems to be the maximum buffersize?
142        $buffer = bzread($bz,8192);
143        if(($buffer === false) || (bzerrno($bz) !== 0)) {
144            return false;
145        }
146        $str = $str . $buffer;
147        if($array) {
148            $pos = strpos($str, "\n");
149            while($pos !== false) {
150                $lines[] = substr($str, 0, $pos+1);
151                $str = substr($str, $pos+1);
152                $pos = strpos($str, "\n");
153            }
154        }
155    }
156    bzclose($bz);
157    if($array) {
158        if($str !== '') $lines[] = $str;
159        return $lines;
160    }
161    return $str;
162}
163
164/**
165 * Used to write out a DokuWiki page to file, and send IO_WIKIPAGE_WRITE events.
166 *
167 * This generates an action event and delegates to io_saveFile().
168 * Action plugins are allowed to modify the page content in transit.
169 * The file path should not be changed.
170 * (The append parameter is set to false.)
171 *
172 * Event data:
173 * $data[0]    The raw arguments for io_saveFile as an array.
174 * $data[1]    ns: The colon separated namespace path minus the trailing page name. (false if root ns)
175 * $data[2]    page_name: The wiki page name.
176 * $data[3]    rev: The page revision, false for current wiki pages.
177 *
178 * @author Ben Coburn <btcoburn@silicodon.net>
179 *
180 * @param string $file      filename
181 * @param string $content
182 * @param string $id        page id
183 * @param int|bool $rev timestamp of revision
184 * @return bool
185 */
186function io_writeWikiPage($file, $content, $id, $rev=false) {
187    if (empty($rev)) { $rev = false; }
188    if ($rev===false) { io_createNamespace($id); } // create namespaces as needed
189    $data = array(array($file, $content, false), getNS($id), noNS($id), $rev);
190    return trigger_event('IO_WIKIPAGE_WRITE', $data, '_io_writeWikiPage_action', false);
191}
192
193/**
194 * Callback adapter for io_saveFile().
195 * @author Ben Coburn <btcoburn@silicodon.net>
196 *
197 * @param array $data event data
198 * @return bool
199 */
200function _io_writeWikiPage_action($data) {
201    if (is_array($data) && is_array($data[0]) && count($data[0])===3) {
202        $ok = call_user_func_array('io_saveFile', $data[0]);
203        // for attic files make sure the file has the mtime of the revision
204        if($ok && is_int($data[3]) && $data[3] > 0) {
205            @touch($data[0][0], $data[3]);
206        }
207        return $ok;
208    } else {
209        return false; //callback error
210    }
211}
212
213/**
214 * Internal function to save contents to a file.
215 *
216 * @author  Andreas Gohr <andi@splitbrain.org>
217 *
218 * @param string $file filename path to file
219 * @param string $content
220 * @param bool   $append
221 * @return bool true on success, otherwise false
222 */
223function _io_saveFile($file, $content, $append) {
224    global $conf;
225    $mode = ($append) ? 'ab' : 'wb';
226    $fileexists = file_exists($file);
227
228    if(substr($file,-3) == '.gz'){
229        if(!DOKU_HAS_GZIP) return false;
230        $fh = @gzopen($file,$mode.'9');
231        if(!$fh) return false;
232        gzwrite($fh, $content);
233        gzclose($fh);
234    }else if(substr($file,-4) == '.bz2'){
235        if(!DOKU_HAS_BZIP) return false;
236        if($append) {
237            $bzcontent = bzfile($file);
238            if($bzcontent === false) return false;
239            $content = $bzcontent.$content;
240        }
241        $fh = @bzopen($file,'w');
242        if(!$fh) return false;
243        bzwrite($fh, $content);
244        bzclose($fh);
245    }else{
246        $fh = @fopen($file,$mode);
247        if(!$fh) return false;
248        fwrite($fh, $content);
249        fclose($fh);
250    }
251
252    if(!$fileexists and !empty($conf['fperm'])) chmod($file, $conf['fperm']);
253    return true;
254}
255
256/**
257 * Saves $content to $file.
258 *
259 * If the third parameter is set to true the given content
260 * will be appended.
261 *
262 * Uses gzip if extension is .gz
263 * and bz2 if extension is .bz2
264 *
265 * @author  Andreas Gohr <andi@splitbrain.org>
266 *
267 * @param string $file filename path to file
268 * @param string $content
269 * @param bool   $append
270 * @return bool true on success, otherwise false
271 */
272function io_saveFile($file, $content, $append=false) {
273    io_makeFileDir($file);
274    io_lock($file);
275    if(!_io_saveFile($file, $content, $append)) {
276        msg("Writing $file failed",-1);
277        io_unlock($file);
278        return false;
279    }
280    io_unlock($file);
281    return true;
282}
283
284/**
285 * Replace one or more occurrences of a line in a file.
286 *
287 * The default, when $maxlines is 0 is to delete all matching lines then append a single line.
288 * A regex that matches any part of the line will remove the entire line in this mode.
289 * Captures in $newline are not available.
290 *
291 * Otherwise each line is matched and replaced individually, up to the first $maxlines lines
292 * or all lines if $maxlines is -1. If $regex is true then captures can be used in $newline.
293 *
294 * Be sure to include the trailing newline in $oldline when replacing entire lines.
295 *
296 * Uses gzip if extension is .gz
297 * and bz2 if extension is .bz2
298 *
299 * @author Steven Danz <steven-danz@kc.rr.com>
300 * @author Christopher Smith <chris@jalakai.co.uk>
301 * @author Patrick Brown <ptbrown@whoopdedo.org>
302 *
303 * @param string $file     filename
304 * @param string $oldline  exact linematch to remove
305 * @param string $newline  new line to insert
306 * @param bool   $regex    use regexp?
307 * @param int    $maxlines number of occurrences of the line to replace
308 * @return bool true on success
309 */
310function io_replaceInFile($file, $oldline, $newline, $regex=false, $maxlines=0) {
311    if ((string)$oldline === '') {
312        trigger_error('$oldline parameter cannot be empty in io_replaceInFile()', E_USER_WARNING);
313        return false;
314    }
315
316    if (!file_exists($file)) return true;
317
318    io_lock($file);
319
320    // load into array
321    if(substr($file,-3) == '.gz'){
322        if(!DOKU_HAS_GZIP) return false;
323        $lines = gzfile($file);
324    }else if(substr($file,-4) == '.bz2'){
325        if(!DOKU_HAS_BZIP) return false;
326        $lines = bzfile($file, true);
327    }else{
328        $lines = file($file);
329    }
330
331    // make non-regexes into regexes
332    $pattern = $regex ? $oldline : '/^'.preg_quote($oldline,'/').'$/';
333    $replace = $regex ? $newline : addcslashes($newline, '\$');
334
335    // remove matching lines
336    if ($maxlines > 0) {
337        $count = 0;
338        $matched = 0;
339        foreach($lines as $i => $line) {
340            if($count >= $maxlines) break;
341            // $matched will be set to 0|1 depending on whether pattern is matched and line replaced
342            $lines[$i] = preg_replace($pattern, $replace, $line, -1, $matched);
343            if ($matched) $count++;
344        }
345    } else if ($maxlines == 0) {
346        $lines = preg_grep($pattern, $lines, PREG_GREP_INVERT);
347
348        if ((string)$newline !== ''){
349            $lines[] = $newline;
350        }
351    } else {
352        $lines = preg_replace($pattern, $replace, $lines);
353    }
354
355    if(count($lines)){
356        if(!_io_saveFile($file, join('',$lines), false)) {
357            msg("Removing content from $file failed",-1);
358            io_unlock($file);
359            return false;
360        }
361    }else{
362        @unlink($file);
363    }
364
365    io_unlock($file);
366    return true;
367}
368
369/**
370 * Delete lines that match $badline from $file.
371 *
372 * Be sure to include the trailing newline in $badline
373 *
374 * @author Patrick Brown <ptbrown@whoopdedo.org>
375 *
376 * @param string $file    filename
377 * @param string $badline exact linematch to remove
378 * @param bool   $regex   use regexp?
379 * @return bool true on success
380 */
381function io_deleteFromFile($file,$badline,$regex=false){
382    return io_replaceInFile($file,$badline,null,$regex,0);
383}
384
385/**
386 * Tries to lock a file
387 *
388 * Locking is only done for io_savefile and uses directories
389 * inside $conf['lockdir']
390 *
391 * It waits maximal 3 seconds for the lock, after this time
392 * the lock is assumed to be stale and the function goes on
393 *
394 * @author Andreas Gohr <andi@splitbrain.org>
395 *
396 * @param string $file filename
397 */
398function io_lock($file){
399    global $conf;
400
401    $lockDir = $conf['lockdir'].'/'.md5($file);
402    @ignore_user_abort(1);
403
404    $timeStart = time();
405    do {
406        //waited longer than 3 seconds? -> stale lock
407        if ((time() - $timeStart) > 3) break;
408        $locked = @mkdir($lockDir, $conf['dmode']);
409        if($locked){
410            if(!empty($conf['dperm'])) chmod($lockDir, $conf['dperm']);
411            break;
412        }
413        usleep(50);
414    } while ($locked === false);
415}
416
417/**
418 * Unlocks a file
419 *
420 * @author Andreas Gohr <andi@splitbrain.org>
421 *
422 * @param string $file filename
423 */
424function io_unlock($file){
425    global $conf;
426
427    $lockDir = $conf['lockdir'].'/'.md5($file);
428    @rmdir($lockDir);
429    @ignore_user_abort(0);
430}
431
432/**
433 * Create missing namespace directories and send the IO_NAMESPACE_CREATED events
434 * in the order of directory creation. (Parent directories first.)
435 *
436 * Event data:
437 * $data[0]    ns: The colon separated namespace path minus the trailing page name.
438 * $data[1]    ns_type: 'pages' or 'media' namespace tree.
439 *
440 * @author Ben Coburn <btcoburn@silicodon.net>
441 *
442 * @param string $id page id
443 * @param string $ns_type 'pages' or 'media'
444 */
445function io_createNamespace($id, $ns_type='pages') {
446    // verify ns_type
447    $types = array('pages'=>'wikiFN', 'media'=>'mediaFN');
448    if (!isset($types[$ns_type])) {
449        trigger_error('Bad $ns_type parameter for io_createNamespace().');
450        return;
451    }
452    // make event list
453    $missing = array();
454    $ns_stack = explode(':', $id);
455    $ns = $id;
456    $tmp = dirname( $file = call_user_func($types[$ns_type], $ns) );
457    while (!@is_dir($tmp) && !(file_exists($tmp) && !is_dir($tmp))) {
458        array_pop($ns_stack);
459        $ns = implode(':', $ns_stack);
460        if (strlen($ns)==0) { break; }
461        $missing[] = $ns;
462        $tmp = dirname(call_user_func($types[$ns_type], $ns));
463    }
464    // make directories
465    io_makeFileDir($file);
466    // send the events
467    $missing = array_reverse($missing); // inside out
468    foreach ($missing as $ns) {
469        $data = array($ns, $ns_type);
470        trigger_event('IO_NAMESPACE_CREATED', $data);
471    }
472}
473
474/**
475 * Create the directory needed for the given file
476 *
477 * @author  Andreas Gohr <andi@splitbrain.org>
478 *
479 * @param string $file file name
480 */
481function io_makeFileDir($file){
482    $dir = dirname($file);
483    if(!@is_dir($dir)){
484        io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
485    }
486}
487
488/**
489 * Creates a directory hierachy.
490 *
491 * @link    http://php.net/manual/en/function.mkdir.php
492 * @author  <saint@corenova.com>
493 * @author  Andreas Gohr <andi@splitbrain.org>
494 *
495 * @param string $target filename
496 * @return bool|int|string
497 */
498function io_mkdir_p($target){
499    global $conf;
500    if (@is_dir($target)||empty($target)) return 1; // best case check first
501    if (file_exists($target) && !is_dir($target)) return 0;
502    //recursion
503    if (io_mkdir_p(substr($target,0,strrpos($target,'/')))){
504        $ret = @mkdir($target,$conf['dmode']); // crawl back up & create dir tree
505        if($ret && !empty($conf['dperm'])) chmod($target, $conf['dperm']);
506        return $ret;
507    }
508    return 0;
509}
510
511/**
512 * Recursively delete a directory
513 *
514 * @author Andreas Gohr <andi@splitbrain.org>
515 * @param string $path
516 * @param bool   $removefiles defaults to false which will delete empty directories only
517 * @return bool
518 */
519function io_rmdir($path, $removefiles = false) {
520    if(!is_string($path) || $path == "") return false;
521    if(!file_exists($path)) return true; // it's already gone or was never there, count as success
522
523    if(is_dir($path) && !is_link($path)) {
524        $dirs  = array();
525        $files = array();
526
527        if(!$dh = @opendir($path)) return false;
528        while(false !== ($f = readdir($dh))) {
529            if($f == '..' || $f == '.') continue;
530
531            // collect dirs and files first
532            if(is_dir("$path/$f") && !is_link("$path/$f")) {
533                $dirs[] = "$path/$f";
534            } else if($removefiles) {
535                $files[] = "$path/$f";
536            } else {
537                return false; // abort when non empty
538            }
539
540        }
541        closedir($dh);
542
543        // now traverse into  directories first
544        foreach($dirs as $dir) {
545            if(!io_rmdir($dir, $removefiles)) return false; // abort on any error
546        }
547
548        // now delete files
549        foreach($files as $file) {
550            if(!@unlink($file)) return false; //abort on any error
551        }
552
553        // remove self
554        return @rmdir($path);
555    } else if($removefiles) {
556        return @unlink($path);
557    }
558    return false;
559}
560
561/**
562 * Creates a unique temporary directory and returns
563 * its path.
564 *
565 * @author Michael Klier <chi@chimeric.de>
566 *
567 * @return false|string path to new directory or false
568 */
569function io_mktmpdir() {
570    global $conf;
571
572    $base = $conf['tmpdir'];
573    $dir  = md5(uniqid(mt_rand(), true));
574    $tmpdir = $base.'/'.$dir;
575
576    if(io_mkdir_p($tmpdir)) {
577        return($tmpdir);
578    } else {
579        return false;
580    }
581}
582
583/**
584 * downloads a file from the net and saves it
585 *
586 * if $useAttachment is false,
587 * - $file is the full filename to save the file, incl. path
588 * - if successful will return true, false otherwise
589 *
590 * if $useAttachment is true,
591 * - $file is the directory where the file should be saved
592 * - if successful will return the name used for the saved file, false otherwise
593 *
594 * @author Andreas Gohr <andi@splitbrain.org>
595 * @author Chris Smith <chris@jalakai.co.uk>
596 *
597 * @param string $url           url to download
598 * @param string $file          path to file or directory where to save
599 * @param bool   $useAttachment true: try to use name of download, uses otherwise $defaultName
600 *                              false: uses $file as path to file
601 * @param string $defaultName   fallback for if using $useAttachment
602 * @param int    $maxSize       maximum file size
603 * @return bool|string          if failed false, otherwise true or the name of the file in the given dir
604 */
605function io_download($url,$file,$useAttachment=false,$defaultName='',$maxSize=2097152){
606    global $conf;
607    $http = new DokuHTTPClient();
608    $http->max_bodysize = $maxSize;
609    $http->timeout = 25; //max. 25 sec
610    $http->keep_alive = false; // we do single ops here, no need for keep-alive
611
612    $data = $http->get($url);
613    if(!$data) return false;
614
615    $name = '';
616    if ($useAttachment) {
617        if (isset($http->resp_headers['content-disposition'])) {
618            $content_disposition = $http->resp_headers['content-disposition'];
619            $match=array();
620            if (is_string($content_disposition) &&
621                    preg_match('/attachment;\s*filename\s*=\s*"([^"]*)"/i', $content_disposition, $match)) {
622
623                $name = utf8_basename($match[1]);
624            }
625
626        }
627
628        if (!$name) {
629            if (!$defaultName) return false;
630            $name = $defaultName;
631        }
632
633        $file = $file.$name;
634    }
635
636    $fileexists = file_exists($file);
637    $fp = @fopen($file,"w");
638    if(!$fp) return false;
639    fwrite($fp,$data);
640    fclose($fp);
641    if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
642    if ($useAttachment) return $name;
643    return true;
644}
645
646/**
647 * Windows compatible rename
648 *
649 * rename() can not overwrite existing files on Windows
650 * this function will use copy/unlink instead
651 *
652 * @param string $from
653 * @param string $to
654 * @return bool succes or fail
655 */
656function io_rename($from,$to){
657    global $conf;
658    if(!@rename($from,$to)){
659        if(@copy($from,$to)){
660            if($conf['fperm']) chmod($to, $conf['fperm']);
661            @unlink($from);
662            return true;
663        }
664        return false;
665    }
666    return true;
667}
668
669/**
670 * Runs an external command with input and output pipes.
671 * Returns the exit code from the process.
672 *
673 * @author Tom N Harris <tnharris@whoopdedo.org>
674 *
675 * @param string $cmd
676 * @param string $input  input pipe
677 * @param string $output output pipe
678 * @return int exit code from process
679 */
680function io_exec($cmd, $input, &$output){
681    $descspec = array(
682            0=>array("pipe","r"),
683            1=>array("pipe","w"),
684            2=>array("pipe","w"));
685    $ph = proc_open($cmd, $descspec, $pipes);
686    if(!$ph) return -1;
687    fclose($pipes[2]); // ignore stderr
688    fwrite($pipes[0], $input);
689    fclose($pipes[0]);
690    $output = stream_get_contents($pipes[1]);
691    fclose($pipes[1]);
692    return proc_close($ph);
693}
694
695/**
696 * Search a file for matching lines
697 *
698 * This is probably not faster than file()+preg_grep() but less
699 * memory intensive because not the whole file needs to be loaded
700 * at once.
701 *
702 * @author Andreas Gohr <andi@splitbrain.org>
703 * @param  string $file    The file to search
704 * @param  string $pattern PCRE pattern
705 * @param  int    $max     How many lines to return (0 for all)
706 * @param  bool   $backref When true returns array with backreferences instead of lines
707 * @return array matching lines or backref, false on error
708 */
709function io_grep($file,$pattern,$max=0,$backref=false){
710    $fh = @fopen($file,'r');
711    if(!$fh) return false;
712    $matches = array();
713
714    $cnt  = 0;
715    $line = '';
716    while (!feof($fh)) {
717        $line .= fgets($fh, 4096);  // read full line
718        if(substr($line,-1) != "\n") continue;
719
720        // check if line matches
721        if(preg_match($pattern,$line,$match)){
722            if($backref){
723                $matches[] = $match;
724            }else{
725                $matches[] = $line;
726            }
727            $cnt++;
728        }
729        if($max && $max == $cnt) break;
730        $line = '';
731    }
732    fclose($fh);
733    return $matches;
734}
735
736
737/**
738 * Get size of contents of a file, for a compressed file the uncompressed size
739 * Warning: reading uncompressed size of content of bz-files requires uncompressing
740 *
741 * @author  Gerrit Uitslag <klapinklapin@gmail.com>
742 *
743 * @param string $file filename path to file
744 * @return int size of file
745 */
746function io_getSizeFile($file) {
747    if (!file_exists($file)) return 0;
748
749    if(substr($file,-3) == '.gz'){
750        $fp = @fopen($file, "rb");
751        if($fp === false) return 0;
752
753        fseek($fp, -4, SEEK_END);
754        $buffer = fread($fp, 4);
755        fclose($fp);
756        $array = unpack("V", $buffer);
757        $uncompressedsize = end($array);
758    }else if(substr($file,-4) == '.bz2'){
759        if(!DOKU_HAS_BZIP) return 0;
760
761        $bz = bzopen($file,"r");
762        if($bz === false) return 0;
763
764        $uncompressedsize = 0;
765        while (!feof($bz)) {
766            //8192 seems to be the maximum buffersize?
767            $buffer = bzread($bz,8192);
768            if(($buffer === false) || (bzerrno($bz) !== 0)) {
769                return 0;
770            }
771            $uncompressedsize += strlen($buffer);
772        }
773    }else{
774        $uncompressedsize = filesize($file);
775    }
776
777    return $uncompressedsize;
778 }
779