pcntl_signal

Description

bool pcntl_signal ( int signo, mixed handle)

The pcntl_signal() function installs a new signal handler for the signal indicated by signo. The signal handler is set to handler which may be the name of a user created function, or either of the two global constants SIG_IGN or SIG_DFL.

pcntl_signal() returns TRUE on success or FALSE on failure.

P°φklad 1. pcntl_signal() Example

<?php

// signal handler function
function sig_handler($signo) {

     switch($signo) {
         case SIGTERM:
             // handle shutdown tasks
             exit;
             break;
         case SIGHUP:
             // handle restart tasks
             break;
         case SIGUSR1:
             print "Caught SIGUSR1...\n";
             break;
         default:
             // handle all other signals
     }

}


print "Installing signal handler...\n";

// setup signal handlers
pcntl_signal(SIGTERM, "sig_handler");
pcntl_signal(SIGHUP, "sig_handler");
pcntl_signal(SIGUSR1, "sig_handler");

print "Generating signal SIGTERM to self...\n";

// send SIGUSR1 to current process id
posix_kill(posix_getpid(), SIGUSR1);

print "Done\n"

?>