Ответ 1
Вот простой код, который вы должны попробовать/отлаживать:
<?php
ignore_user_abort(false);
function shutdown() {
echo "shutdown function\n";
}
register_shutdown_function('shutdown');
class shutdown {
function __construct() {
echo "shutdown::construct\n";
}
function __destruct() {
echo "shutdown::destruct\n";
}
}
$s = new shutdown();
declare(ticks = 1);
function sig_handler($signo) {
switch ($signo) {
case SIGTERM:
echo "SIG: handle shutdown tasks\n";
break;
case SIGHUP:
echo "SIG: handle restart tasks\n";
break;
case SIGUSR1:
echo "SIG: Caught SIGUSR1\n";
break;
case SIGINT:
echo "SIG: Caught CTRL+C\n";
break;
default:
echo "SIG: handle all other signals\n";
break;
}
return;
}
echo "Installing signal handler...\n";
pcntl_signal(SIGTERM, "sig_handler");
pcntl_signal(SIGHUP, "sig_handler");
pcntl_signal(SIGUSR1, "sig_handler");
pcntl_signal(SIGINT, "sig_handler");
echo "Generating signal SIGTERM to self...\n";
# killing the script using bad memory allocation
/*
ini_set('memory_limit', '1K');
$data = '';
for($i = 0; $i < 1000; $i++) {
$data .= str_repeat($i . time(), time());
}
*/
# simulating CTRL+C
// for($i = 0; $i < 100000000; $i++) { } // don't forget to press CTRL+C
echo "Done\n";
если cronjob работает нормально, вы получите:
shutdown::construct
Installing signal handler...
Generating signal SIGTERM to self...
Done
shutdown function
shutdown::destruct
если вы получаете Неустранимая ошибка:
shutdown::construct
Installing signal handler...
Generating signal SIGTERM to self...
PHP Fatal error: Possible integer overflow in memory allocation (11 * 1321404273 + 1) in /var/www/domain.com/php.php on line 51
shutdown function
если вы убили процесс:
kill <processid>
shutdown::construct
Installing signal handler...
Generating signal SIGTERM to self...
SIG: handle shutdown tasks
Done
shutdown function
shutdown::destruct
вы также можете использовать posix_kill(posix_getpid(), <signal you like>);
в каждом случае.
подробнее:
http://php.net/manual/en/function.pcntl-signal.php
http://en.wikipedia.org/wiki/Signal_%28computing%29
http://users.actcom.co.il/~choo/lupg/tutorials/signals/signals-programming.html