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

首先使用 php_value[opcache.preload] 和 php_value[opcache.preload_user] 复现 FPM 配置，然后将 phpinfo() 与 opcache_get_status() 进行比较。追踪 FPM 相对于 opcache 预加载初始化应用这些设置的时机；完成时应定义并测试预加载设置应用得太晚时的行为。