How to stop php script execution on php-fpm/nginx?

Question

Unfortunately calling php exit() on php-fpm/nginx configuration does not stop the script immediately while file handles might not be closed.

Some developers suggest calling fastcgi_finish_request() but also this does not stop the script.

Others suggest wrapping all code in a catch block:

<?php
    class SystemExit extends Exception {}
    try {
       /* PUT ALL THE CODE HERE */
    } catch (SystemExit $e) { /* do nothing */ }
?>

and throwing an exception where code stop is needed:

if (SOME_EXIT_CONDITION)
   throw new SystemExit(); // instead of exit()

This would mean editing all php files to include try/catch block and seems tedious to me.

Are there any other clean solutions?

try the following code: ` echo "You have to wait 10 seconds to see this.<br>"; register_shutdown_function('shutdown'); exit; function shutdown(){ sleep(10); echo "Because exit() doesn't terminate php-fpm calls immediately.<br>"; } ` — Aditya Zaqi
– Aditya Zaqi, Commented Nov 27, 2015 at 10:55

ksimka · Accepted Answer · 2015-11-27 11:33:34Z

So we found out that it's a register_shutdown_function callback that prevents your script from exiting immediately.

PHP shutdown function is designed to be called on any script shutdown when possible. But it has a feature: if one of shutdown callbacks calls exit — script is exiting without calling any other callbacks.

So if you really want to skip a shutdown function in some cases, you should register some killer-function as a very first shutdown callback. Inside that killer-function you will check a kind of singleton for state: do we want to exit? — call exit(), otherwise — return.

<?php

function killer_function() {
    if ($someGlobalThing->needToExitRightNow()) {
        exit();
    }
}

register_shutdown_function('killer_function');

// ...

function exit_now() {
    $someGlobalThing->exitNow();
    exit();
}

($someGlobalThing can be a singleton or some super-global variable or a global registry or whatever you like)

Then calling exit_now() will do the trick.

Collectives™ on Stack Overflow

How to stop php script execution on php-fpm/nginx?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related