opcache.file_cache_read_only

opcache: opcache.file_cache_read_only — Enables or disables read-only mode for the second level cache directory. It should improve performance for read-only containers, when the cache is pre-warmed and packaged alongside the application. Best used with opcache.validate_timestamps=0, opcache.enable_file_override=1 and opcache.file_cache_consistency_checks=0. Note: A cache generated with a different build of PHP, a different file path, or different settings (including which extensions are loaded), may be ignored.

Modifiability: INI_SYSTEM - The opcache.file_cache_read_only INI directive directive is a system-directive, and can only be configured in php.ini files or Server-API configuration files such as Apache httpd.conf. It cannot be configured with ini_set calls.

[opcache]
opcache.file_cache_read_only = 0