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).
chown
(PHP 4, PHP 5, PHP 7, PHP 8)
chown — Modifica o proprietário do arquivo
Descrição
Tenta modificar o proprietário do filename para
user. Somente o superusuário pode modificar o
proprietário de um arquivo.
Parâmetros
-
filename -
Caminho para o arquivo.
-
user -
O nome do usuário ou número.
Valor Retornado
Retorna true em caso de sucesso ou false em caso de falha.
Exemplos
Exemplo #1 Uso simples de chown()
<?php
// Nome de usuário e do arquivo que serão usados
$file_name= "foo.php";
$path = "/home/sites/php.net/public_html/sandbox/" . $file_name ;
$user_name = "root";
// Define o usuário proprietário
chown($path, $user_name);
// Verifica o resultado
$stat = stat($path);
print_r(posix_getpwuid($stat['uid']));
?>O exemplo acima produzirá algo semelhante a:
Array
(
[name] => root
[passwd] => x
[uid] => 0
[gid] => 0
[gecos] => root
[dir] => /root
[shell] => /bin/bash
)
Notas
Nota: Esta função não funcionará em arquivos remotos, pois o arquivo a ser examinado deve ser acessível através do sistema de arquivos do servidor.
Nota: No Windows, esta função falha silenciosamente quando aplicada a um arquivo normal.
add a note
User Contributed Notes 7 notes
martijn at sigterm dot nl ¶
21 years ago
njs+php at scifi dot squawk dot com ¶
24 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.
Klaus Zierer ¶
21 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");
Mikevac at yahoo dot com ¶
16 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.
rickard at 0x539 dot se ¶
15 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.
Tayfun Bilsel ¶
18 years ago
Simple usage of the chown:
<?php
$file_name= "test";
$path = "/var/www/html/test/" . $file_name ;
$user_name = "root";
chown($path, $user_name);
?>
greg _at_ rhythmicdesign d.o.t com ¶
20 years ago
<?php
function recurse_chown_chgrp($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.
