php man page for posix_getppid

POSIX_GETPPID(3)							 1							  POSIX_GETPPID(3)

posix_getppid - Return the parent process identifier

SYNOPSIS
       int posix_getppid (void	)

DESCRIPTION
	Return the process identifier of the parent process of the current process.

RETURN VALUES
	Returns the identifier, as an integer.

EXAMPLES
       Example #1

	      Example use of posix_getppid(3)

	      <?php
	      echo posix_getppid(); //8259
	      ?>

PHP Documentation Group 													  POSIX_GETPPID(3)