php man page for posix_getgroups

POSIX_GETGROUPS(3)							 1							POSIX_GETGROUPS(3)

posix_getgroups - Return the group set of the current process

SYNOPSIS
       array posix_getgroups (void  )

DESCRIPTION
	Gets the group set of the current process.

RETURN VALUES
	Returns an array of integers containing the numeric group ids of the group set of the current process.

EXAMPLES
       Example #1

	      Example use of posix_getgroups(3)

	      <?php

	      $groups = posix_getgroups();

	      print_r($groups);
	      ?>

	      The above example will output something similar to:

	      Array
	      (
		  [0] => 4
		  [1] => 20
		  [2] => 24
		  [3] => 25
		  [4] => 29
		  [5] => 30
		  [6] => 33
		  [7] => 44
		  [8] => 46
		  [9] => 104
		  [10] => 109
		  [11] => 110
		  [12] => 1000
	      )

SEE ALSO
       posix_getgrgid(3).

PHP Documentation Group 													POSIX_GETGROUPS(3)