How can I enable opcache preloading in PHP 7.4?

Question

I'd like to enable opcache preloading (RFC) on my production servers in PHP 7.4.

I'm using Symfony 4 if it changes anything.

Answer 1

First of all you should add:

opcache.preload=/path/to/project/preload.php

to your php.ini

Then in your PHP script you should pass in opcache_compile_file($file); each file you want to preloaded.