   #PHP Manual POSIX functions posix_seteuid posix_setpgid

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                                 posix_setgid

   (PHP 3>= 3.0.13, PHP 4 )
   posix_setgid --  Set the GID of the current process

Description

   bool posix_setgid ( int gid)

   Set the real group ID of the current process. This is a privileged
   function and you need appropriate privileges (usually root) on your
   system to be able to perform this function. The appropriate order of
   function calls is posix_setgid() first, posix_setuid() last.

   Returns TRUE on success, FALSE otherwise.
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