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PODRĘCZNIK PHP 5.x, 4.x, 3.x - częściowo spolszczony / źródło: www.php.net
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unlink (PHP 3, PHP 4, PHP 5) unlink -- Kasowanie pliku Opisbool unlink ( string nazwa_pliku [, resource kontekst] )
Kasuje nazwa_pliku. Podobnie do funkcji unlink()
z Unix'owego C. Zwraca TRUE w przypadku sukcesu, FALSE w
przypadku porażki.
Notatka:
W PHP 5.0.0 unlink() może być użyta z niektórymi
wrapperami URL. Skorzystaj z Dodatek L
aby uzyskać listę wrapperów, które obsługują unlink().
Notatka: Wsparcie dla kontekstów zostało
dodane w PHP 5.0.0.
Patrz także: rmdir() do kasowania katalogów.
User Contributed Notesstefano at takys dot it
28-Dec-2005 12:57
A short but powerfull recursive function that works also if the dirs contain hidden files
function SureRemoveDir($dir) {
if(!$dh = @opendir($dir)) return;
while (($obj = readdir($dh))) {
if($obj=='.' || $obj=='..') continue;
if (!@unlink($dir.'/'.$obj)) {
SureRemoveDir($dir.'/'.$obj);
} else {
$file_deleted++;
}
}
if (@rmdir($dir)) $dir_deleted++;
}
Anarcho at ssm-clan dot de
26-Nov-2005 11:56
Just to be a bit more accurate to the post of "jchase at solidmark dot com":
On unixoide systems you only need write permission for the directory to delete a file. The permissions of the file are nonrelevant.
You need file permissions if you want to change the file data or to read the data.
bishop
05-Jun-2005 09:30
<?php
function rm($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, $rcs)) {
return false;
}
} else {
trigger_error('Param #1 must be filename or glob pattern, or array of filenames or glob patterns', E_USER_ERROR);
return false;
}
return true;
}
?>
jchase at solidmark dot com
21-May-2005 07:05
[Editor's note: A suggestion for a work-around was submitted by argistof at gmail dot com: You can use the recursive option (see man chmod) when chmodding, for instance 'chmod 777 directory/ -R'. Be aware though, this will change the permissions of all files and folders in the diectory.]
Just a note which you probably all know, but I didn't, and it might save another poor sap some unnecessary time:
I was doing unlink() and fopen() on a file and got a permission denied error, even after chmoding the file to 0777.
The folder that contains the file must ALSO have write permission. Took a headache to find this out.
Hope this helps someone :)
kickthedonkey at gmail dot com
17-May-2005 01:24
Regarding the comment by 'admin at crazydrumguy dot info': You might want to consider using is_file instead of file_exists if you're wanting to target a file specifically (and not a directory). file_exists($name) will return true if $name contains a path to a directory (which may or may not be what you want to do...)
ashley at semantic dot org
02-Apr-2005 12:50
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.
dagski_AT_gmail_DOT_com
07-Feb-2005 07:19
before you could unlink a file created which uses a handle e.g.,
$handle = sqlite('temp.db');
unset($handle); first befofe
unlink($handle);
to avoide permission denied error.
admin at crazydrumguy dot info
23-Jan-2005 02:43
Regarding the previous note, you can accomplish the same thing by using file_exists.
<?php
if(file_exists($file))
unlink($file);
?>
xenon54 at generationphp dot net
29-Dec-2004 05:03
Use @ to avoid having a warning error if the file is not found.
<?php
$return = @unlink('filename.txt');
var_dump($return);
?>
chris at vibenewmedia dot com
14-Sep-2004 07:54
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);
}
?>
pc AT newagelab DOT com DOT ua
08-Sep-2004 05:22
To delete files using wildcards:
<?
function delfile($str)
{
foreach(glob($str) as $fn) {
unlink($fn);
}
}
?>
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