   #PHP Manual Filesystem functions basename chmod

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                                     chgrp

   (PHP 3, PHP 4 )
   chgrp -- Changes file group

Description

   bool chgrp ( string filename, mixed group)

   Attempts to change the group of the file filename to group (specified
   by name or number). 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.

   Returns TRUE on success or FALSE on failure.

   See also chown() and chmod().
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