(PHP 4 >= 4.0.7, PHP 5)
pcntl_wifsignaled — Checks whether the status code represents a termination due to a signal
Checks whether the child process exited because of a signal which was not caught.
Параметр status - это переменная, переданная по ссылке в функцию pcntl_waitpid().
Returns TRUE if the child process exited because of a signal which was not caught, FALSE otherwise.