(PHP 4 >= 4.1.0, PHP 5)
pcntl_wexitstatus — Returns the return code of a terminated child
$status
   )
   Returns the return code of a terminated child.  This function is
   only useful if pcntl_wifexited() returned
   TRUE.
  
statusThe status
parameter is the status parameter supplied to a successful
call to pcntl_waitpid().
Returns the return code, as an integer.