When the entry PHP script is modified, the cache is cleared.

I rewrite all non-files or directories in "index.php" and cache some requests based on conditions , so when the content of the `index.php` file is updated, all the cache is cleared.

Start with the entry script named in the report, index.php, and reproduce the cache behavior while changing its contents. Trace which cache conditions are affected and establish whether updating the script should clear all cached requests; done means the expected invalidation behavior is verified.

Written by the indexing model from the issue text.