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[edit] Last updated: Sat, 12 May 2012

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chgrp

(PHP 4, PHP 5)

chgrpChanges file group

Description

bool chgrp ( string $filename , mixed $group )

Attempts to change the group of the file filename to group.

Only the superuser may change the group of a file arbitrarily; other users may change the group of a file to any group of which that user is a member.

Parameters

filename

Path to the file.

group

A group name or number.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 Changing a file's group

<?php
$filename 
'shared_file.txt';
$format "%s's Group ID @ %s: %d\n";
printf($format$filenamedate('r'), filegroup($filename));
chgrp($filename8);
clearstatcache(); // do not cache filegroup() results
printf($format$filenamedate('r'), filegroup($filename));
?>

Notes

Note: This function will not work on remote files as the file to be examined must be accessible via the server's filesystem.

Note: When safe mode is enabled, PHP checks whether the files or directories being operated upon have the same UID (owner) as the script that is being executed.

See Also



add a note add a note User Contributed Notes chgrp
Dan Dascalescu 03-Dec-2007 05:12
If you call chgrp and pass a non-existent group, you'll get the warning "Warning: chgrp(): Unable to find gid for nogroup in".

To check beforehand if the group exists, use posix_getgrid() or posix_getgrnam().

 
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