A look at the section about POSIX functions may be useful.
?php $pid = pcntl_fork(); if ($pid == -1) {die("could not fork");} else if ($pid) {exit(); / / we are the parent} else {/ / we are the child} / / detatch from the controlling terminal if (!posix_setsid()) {die("could not detach from terminal");} / / setup signal handlers pcntl_signal(SIGTERM, "sig_handler"); pcntl_signal(SIGHUP, "sig_handler"); / / loop forever performing tasks while(1) {/ / do something interesting here} function sig_handler($signo) {switch($signo) {case SIGTERM: / / handle shutdown tasks exit; break; case SIGHUP: / / handle restart tasks break; default: / / handle all other signals}}?