Description:
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The `opcache.preload` documentation (https://php.net/manual/en/opcache.configuration.php#ini.opcache.preload) states:

"[…] either by includeing them or by using the opcache_compile_file() function"

However, using `include`, `include_once`, `require` or `require_once` doesn't seem to actually preload files.

Test script:
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The source code: https://github.com/brendt/laravel-preload

The preload file: https://github.com/brendt/laravel-preload/blob/master/preload.php#L88

Tested by dumping `opcache_get_status()['scripts']` right after a server restart: https://github.com/brendt/laravel-preload/blob/master/routes/web.php#L16

Using `opcache_compile_file()`, 39 files are available, while only 16 files are available when using `require` or `include` (these are all non-class files)