FPM is maliciously compliant when asked to set opcache.preload

Description

The following FPM configuration:

php_value[opcache.preload] = /app/config/preload.php
php_value[opcache.preload_user] = app

results in phpinfo() advertising that config.

Yet when calling opcache_get_status(), there is no preload_statistics, and there is no performance improvement in the application.

I asked about this here, and was told that's because it is too late: when setting that config value, FPM has already started. If that's the case, I would expect an exception to be thrown, because I can think of a reason to allow editing that setting past a certain point

PHP Version

8.1.7

Operating System

Linux

Inizia riproducendo la configurazione di FPM con php_value[opcache.preload] e php_value[opcache.preload_user], quindi confronta phpinfo() con opcache_get_status(). Traccia quando FPM applica queste impostazioni rispetto all’inizializzazione del preload di opcache; come criterio di completamento, occorre definire e testare il comportamento quando un’impostazione di preload viene applicata troppo tardi.