php man page for posix_get_last_error

POSIX_GET_LAST_ERROR(3) 						 1						   POSIX_GET_LAST_ERROR(3)

posix_get_last_error - Retrieve the error number set by the last posix function that failed

SYNOPSIS
       int posix_get_last_error (void  )

DESCRIPTION
	Retrieve  the  error  number set by the last posix function that failed. The system error message associated with the errno may be checked
       with posix_strerror(3).

RETURN VALUES
	Returns the errno (error number) set by the last posix function that failed. If no errors exist, 0 is returned.

EXAMPLES
       Example #1

	      posix_get_last_error(3) example

	       This example attempt to kill a bogus process id, which will set the last error. We will then print out the last errno.

	      <?php
	      posix_kill(999459,SIGKILL);
	      echo 'Your error returned was '.posix_get_last_error(); //Your error was ___
	      ?>

SEE ALSO
       posix_strerror(3).

PHP Documentation Group 												   POSIX_GET_LAST_ERROR(3)