如何重启或重新加载nginx使用PHP

Question

i change nginx conf file with php next i want restart nginx. but can not restart nginx

<?php
    if(exec("service nginx restart")) {
        echo "ok shd";
    } else {
        echo "error";
    }
?>
<hr>
<?php
    if(exec("/etc/init.d/nginx reload")) {
        echo "ok shd";
    } else {
        echo "error";
    }
?>
<hr>
<?php
    if(exec("/usr/sbin/nginx -s reload")) {
        echo "ok shd";
    } else {
        echo "error";
    }
?>

output is :

error<hr>
error<hr>
error

To do exec("service nginx restart") I need acces to php-fpm as root, so i go to /usr/local/etc/php-fpm.conf

user = nobody
group = nobody

and change it to:

user = root
group = root

and next enter service php-fpm restart

output:

Starting php-fpm [11-Feb-2016 05:14:33] ERROR: [pool www] please specify user and group other than root
[11-Feb-2016 05:14:33] ERROR: FPM initialization failed
 failed

and this means it can't be run as root.

So how can I restart or reload nginx using php?

Answer 1

I need acces to php-fpm as root

OMG NO

Theres's a very good reason PHP-FPM won't run as root - because its a really, really bad thing to do.

If you really must expose this functionality via a webserver then do it via sudo. Similarly any changes to your system config should be via sudo.

BTW: one crucially important thing missing from your script is ignore_user_abort(). When (if) nginx is restarted by PHP the connection to the browser will be lost. By default, PHP will terminate at this point.