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Deletes a file
(PHP 4, PHP 5)
Related Examples ( Source code ) » unlink Examples ( Source code ) » Delete a file Examples ( Source code ) » File existance Examples ( Source code ) » Define recursive function to delete directories Examples ( Source code ) » Download big file using HttpRequest Code Examples / Notes » unlinkjchase
[Editor's note: A suggestion for a work-around was submitted by argistof at gmail dot com: You can use the recursive option (see man chmod) when chmodding, for instance 'chmod 777 directory/ -R'. Be aware though, this will change the permissions of all files and folders in the diectory.] Just a note which you probably all know, but I didn't, and it might save another poor sap some unnecessary time: I was doing unlink() and fopen() on a file and got a permission denied error, even after chmoding the file to 0777. The folder that contains the file must ALSO have write permission. Took a headache to find this out. Hope this helps someone :) pc
To delete files using wildcards: <? function delfile($str) { foreach(glob($str) as $fn) { unlink($fn); } } ?> chris
To delete all files of a particular extension, or infact, delete all with wildcard, a much simplar way is to use the glob function. Say I wanted to delete all jpgs ......... <?php foreach (glob("*.jpg") as $filename) { echo "$filename size " . filesize($filename) . "\n"; unlink($filename); } ?> anarcho
Just to be a bit more accurate to the post of "jchase at solidmark dot com": On unixoide systems you only need write permission for the directory to delete a file. The permissions of the file are nonrelevant. You need file permissions if you want to change the file data or to read the data. khalidz83
If you get an error while deleting a file from the system, check who is the owner of the file. For example if you move to another system and the owner is 'nobody' then the owner should be nobody for that file on the new system.If you delete as another user, you will get an error.
torch
Here is simple function that will find and remove all files (except "." ones) that match the expression ($match, "*" as wildcard) under starting directory ($path) and all other directories under it. function rfr($path,$match){ static $deld = 0, $dsize = 0; $dirs = glob($path."*"); $files = glob($path.$match); foreach($files as $file){ if(is_file($file)){ $dsize += filesize($file); unlink($file); $deld++; } } foreach($dirs as $dir){ if(is_dir($dir)){ $dir = basename($dir) . "/"; rfr($path.$dir,$match); } } return "$deld files deleted with a total size of $dsize bytes"; } rahulnvaidya
ggarciaa's post above has one small error, it will ignore file and directory strings that are evaluated as false (ie. "0") Fixed code is below (false !==) <?php // ggarciaa at gmail dot com (04-July-2007 01:57) // I needed to empty a directory, but keeping it // so I slightly modified the contribution from // stefano at takys dot it (28-Dec-2005 11:57) // A short but powerfull recursive function // that works also if the dirs contain hidden files // // $dir = the target directory // $DeleteMe = if true delete also $dir, if false leave it alone function SureRemoveDir($dir, $DeleteMe) { if(!$dh = @opendir($dir)) return; while (false !== ($obj = readdir($dh))) { if($obj=='.' || $obj=='..') continue; if (!@unlink($dir.'/'.$obj)) SureRemoveDir($dir.'/'.$obj, true); } if ($DeleteMe){ closedir($dh); @rmdir($dir); } } //SureRemoveDir('EmptyMe', false); //SureRemoveDir('RemoveMe', true); ?> james
Cheap and dirty example for cleaning a directory of files so many seconds old. function cleantmp() { $seconds_old = 3600; $directory = "/var/tmp"; if( !$dirhandle = @opendir($directory) ) return; while( false !== ($filename = readdir($dirhandle)) ) { if( $filename != "." && $filename != ".." ) { $filename = $directory. "/". $filename; if( @filemtime($filename) < (time()-$seconds_old) ) @unlink($filename); } } } dagski_at_gmail_dot_com
before you could unlink a file created which uses a handle e.g., $handle = sqlite('temp.db'); unset($handle); first befofe unlink($handle); to avoide permission denied error. ashley
Actually you should use "@unlink" rather than testing with file_exists. The former is atomic, whereas the latter can break if you can't guarantee only one process will try to delete a given file at a time.
paul
A work around for the Permission Denied problem. I used ftp_connect() then ftp_delete() to erase files which unlink could not erase due to permision problems ggarciaa
<?php // ggarciaa at gmail dot com (04-July-2007 01:57) // I needed to empty a directory, but keeping it // so I slightly modified the contribution from // stefano at takys dot it (28-Dec-2005 11:57) // A short but powerfull recursive function // that works also if the dirs contain hidden files // // $dir = the target directory // $DeleteMe = if true delete also $dir, if false leave it alone function SureRemoveDir($dir, $DeleteMe) { if(!$dh = @opendir($dir)) return; while (($obj = readdir($dh))) { if($obj=='.' || $obj=='..') continue; if (!@unlink($dir.'/'.$obj)) SureRemoveDir($dir.'/'.$obj, true); } if ($DeleteMe){ closedir($dh); @rmdir($dir); } } //SureRemoveDir('EmptyMe', false); //SureRemoveDir('RemoveMe', true); ?> bishop
<?php /** * rm() -- Vigorously erase files and directories. * * @param $fileglob mixed If string, must be a file name (foo.txt), glob pattern (*.txt), or directory name. * If array, must be an array of file names, glob patterns, or directories. */ function rm($fileglob) { if (is_string($fileglob)) { if (is_file($fileglob)) { return unlink($fileglob); } else if (is_dir($fileglob)) { $ok = rm("$fileglob/*"); if (! $ok) { return false; } return rmdir($fileglob); } else { $matching = glob($fileglob); if ($matching === false) { trigger_error(sprintf('No files match supplied glob %s', $fileglob), E_USER_WARNING); return false; } $rcs = array_map('rm', $matching); if (in_array(false, $rcs)) { return false; } } } else if (is_array($fileglob)) { $rcs = array_map('rm', $fileglob); if (in_array(false, $rcs)) { return false; } } else { trigger_error('Param #1 must be filename or glob pattern, or array of filenames or glob patterns', E_USER_ERROR); return false; } return true; } ?> |
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basename chgrp chmod chown clearstatcache copy delete dirname disk_free_space disk_total_space diskfreespace fclose feof fflush fgetc fgetcsv fgets fgetss file_exists file_get_contents file_put_contents file fileatime filectime filegroup fileinode filemtime fileowner fileperms filesize filetype flock fnmatch fopen fpassthru fputcsv fputs fread fscanf fseek fstat ftell ftruncate fwrite glob is_dir is_executable is_file is_link is_readable is_uploaded_file is_writable is_writeable lchgrp lchown link linkinfo lstat mkdir move_uploaded_file parse_ini_file pathinfo pclose popen readfile readlink realpath rename rewind rmdir set_file_buffer stat symlink tempnam tmpfile touch umask unlink |
