SunshinePHP Developer Conference 2015

chown

(PHP 4, PHP 5)

chownChange le propriétaire du fichier

Description

bool chown ( string $filename , mixed $user )

Change le propriétaire du fichier filename en user. Seul le super-utilisateur (root) peut changer arbitrairement le propriétaire d'un fichier.

Liste de paramètres

filename

Chemin vers le fichier.

user

Un nom ou un numéro d'utilisateur.

Valeurs de retour

Cette fonction retourne TRUE en cas de succès ou FALSE si une erreur survient.

Exemples

Exemple #1 Exemple avec chown()

<?php

// Nom du fichier et nom d'utilisateur à utiliser
$file_name"foo.php";
$path "/home/sites/php.net/public_html/sandbox/" $file_name ;
$user_name "root";

// Définit l'utilisateur
chown($path$user_name);

// Vérification du résultat
$stat stat($path);
print_r(posix_getpwuid($stat['uid']));

?>

L'exemple ci-dessus va afficher quelque chose de similaire à :

Array
(
    [name] => root
    [passwd] => x
    [uid] => 0
    [gid] => 0
    [gecos] => root
    [dir] => /root
    [shell] => /bin/bash
)

Notes

Note: Cette fonction ne fonctionne pas avec les fichiers distants, car le fichier utilisé doit être accessible sur le système de fichiers local.

Note: Lorsque le safe-mode est activé, PHP vérifie si le fichier/dossier que vous allez utiliser a le même UID que le script qui est actuellement exécuté.

Voir aussi

  • chmod() - Change le mode du fichier

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User Contributed Notes 7 notes

up
4
njs+php at scifi dot squawk dot com
14 years ago
If you allow sudo execution for chmod by "nobody" (www, webdaemon, httpd, whatever user php is running under)in this manner, it had better be a system on which the owner is able to be root and no one else can run code, else your whole system is compromised.  Someone could change the mode of /etc/passwd or the shadow password file.

Other system commands (sudo mount) and so forth are similar.
up
2
Klaus Zierer
11 years ago
If you want to chown a symlink, PHP will follow the symlink and change the target file.

If you want to chown the symlink, you have to use shell_exec("/bin/chown user.group symlink");
up
1
greg _at_ rhythmicdesign d.o.t com
10 years ago
<?php
function recurse_chown_chgrp($mypath, $uid, $gid)
{
   
$d = opendir ($mypath) ;
    while((
$file = readdir($d)) !== false) {
        if (
$file != "." && $file != "..") {

           
$typepath = $mypath . "/" . $file ;

           
//print $typepath. " : " . filetype ($typepath). "<BR>" ;
           
if (filetype ($typepath) == 'dir') {
               
recurse_chown_chgrp ($typepath, $uid, $gid);
            }

           
chown($typepath, $uid);
           
chgrp($typepath, $gid);

        }
    }

}

recurse_chown_chgrp ("uploads", "unsider", "unsider") ;
?>

for older versions.. unfortunately, it seems I do not have permission to perform these functions.
up
0
Mikevac at yahoo dot com
6 years ago
I've only tested this on Solaris 10 so your mileage may vary.

To allow the apache daemon to change file ownership without being root, add the following line to /etc/system:

set rstchown=0

Reboot the server.

There are security concerns doing this as this modification allows any user to change ownership of their files to anyone else.
up
-1
Tayfun Bilsel
8 years ago
Simple usage of the chown:

<?php

$file_name
= "test";
$path = "/var/www/html/test/" . $file_name ;

$user_name = "root";

chown($path, $user_name);

?>
up
-1
martijn at sigterm dot nl
11 years ago
If chown is filled with a variable (  chown ("myfile", $uid) the uid will be looked up through pwget_uid.

So if you need to set a non existing uid use inval($uid).
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-3
rickard at 0x539 dot se
5 years ago
For most modern Linux systems your apache user should not be run as root, and in order to change the ownership of a file or directory, you need to be root. To get around this problem you can use sudo, but be careful with what permissions you give. Here is an example which is working for me:

www-data        ALL = NOPASSWD: /bin/chown 1[1-9][0-9][0-9]\:1[1-9][0-9][0-9] /home/www/[a-zA-Z0-9]*

This allows the apache server to change ownership of files in /home/www with name containing a-z, A-Z or numbers (note: no subdirectories). The only valid input of userid is a four digit numeric id, between 1100 and 1999.

Hope this helps.
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