chown

(PHP 4, PHP 5, PHP 7)

chownChanges file owner

설명

bool chown ( string $filename , mixed $user )

Attempts to change the owner of the file filename to user user. Only the superuser may change the owner of a file.

인수

filename

Path to the file.

user

A user name or number.

반환값

성공 시 TRUE를, 실패 시 FALSE를 반환합니다.

예제

Example #1 Simple chown() usage

<?php

// File name and username to use
$file_name"foo.php";
$path "/home/sites/php.net/public_html/sandbox/" $file_name ;
$user_name "root";

// Set the user
chown($path$user_name);

// Check the result
$stat stat($path);
print_r(posix_getpwuid($stat['uid']));

?>

위 예제의 출력 예시:

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

주의

Note: 이 함수는 원격 파일을 다루지 못합니다. 파일은 서버 파일시스템을 통해서 사용 가능해야만 합니다.

Note: 안전 모드일 때, PHP는 조작하려는 파일이나 디렉토리가 실행중인 스크립트와 같은 UID(owner)인지 확인합니다.

참고

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User Contributed Notes 7 notes

up
2
martijn at sigterm dot nl
17 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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2
njs+php at scifi dot squawk dot com
19 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.
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1
Klaus Zierer
17 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");
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-4
rickard at 0x539 dot se
11 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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-4
Mikevac at yahoo dot com
12 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.
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-8
Tayfun Bilsel
14 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);

?>
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-12
greg _at_ rhythmicdesign d.o.t com
16 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.
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