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 — ファイルの所有者を変更する
説明
ファイルfilenameの所有者を(名前または番号で指定した)
ユーザーuserに変更しようと試みます。
スーパーユーザーのみがファイルの所有者を変更できます。
パラメータ
-
filename -
ファイルへのパス。
-
user -
ユーザー名あるいはユーザー番号。
戻り値
成功した場合に true を、失敗した場合に false を返します。
例
例1 シンプルな chown() の例
<?php
// 使用するファイル名とユーザー名
$file_name= "foo.php";
$path = "/home/sites/php.net/public_html/sandbox/" . $file_name ;
$user_name = "root";
// ユーザーを設定します
chown($path, $user_name);
// 結果を確認します
$stat = stat($path);
print_r(posix_getpwuid($stat['uid']));
?>上の例の出力は、 たとえば以下のようになります。
Array
(
[name] => root
[passwd] => x
[uid] => 0
[gid] => 0
[gecos] => root
[dir] => /root
[shell] => /bin/bash
)
注意
注意: この関数では、 リモートファイル を 使用することはできません。これは、処理されるファイルがサーバーの ファイルシステムによりアクセスできる必要があるためです。
注意: Windows で通常ファイルに対してこの関数を実行すると、静かに失敗します。
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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.
