php man page for posix_getpgid

POSIX_GETPGID(3)							 1							  POSIX_GETPGID(3)

posix_getpgid - Get process group id for job control

SYNOPSIS
       int posix_getpgid (int  $pid)

DESCRIPTION
	Returns the process group identifier of the process $pid or FALSE on failure.

PARAMETERS
	      o $pid
		- The process id.

RETURN VALUES
	Returns the identifier, as an integer.

EXAMPLES
       Example #1

	      Example use of posix_getpgid(3)

	      <?php
	      $pid = posix_getppid();
	      echo posix_getpgid($pid); //35
	      ?>

NOTES
       Note

	       This is a not POSIX function, but is common on BSD and System V systems. If the system does not support this function, then it will
	      not be included at compile time. This may be checked with function_exists(3).

SEE ALSO
       posix_getppid(3), man page SETPGID(2).

PHP Documentation Group 													  POSIX_GETPGID(3)