Apache关闭后的PHP？

I'm running an Apache server on CentOS and would like to be able restart the webserver from a protected page using the following:

PHP:

<?php
ignore_user_abort(true);
shell_exec('sh sh/restart.sh');
?>

restart.sh:

service httpd restart

My question is if the web server shuts down and the PHP stops executing will the sh script continue running to bring the web server back online?

You should be fine since Apache doesn't shutdown until after the command is issued. But if you really wanted to be safe, use nohup:

shell_exec('nohup sh sh/restart.sh');

If your PHP runs as apache module, then once you kill httpd your script will be terminated instantly. So you need to delegate restart to i.e. command line script (called using exec() or shell_exec())

You might be able to add an & at the end of the command. This will fork the process and run it in the background. This way it will not depend on apache still running.

shell_exec('sh sh/restart.sh &');

If this works, you should not need ignore_user_abort().