As per upcoming [PHP 8.5 deprecations](https://www.zend.com/blog/php-8-5-features#php-8-5-deprecations) a number of `*_close()` and `*_free()` functions are deprecated. For interested parties, there's a preliminary [fix in this branch](https://github.com/ib3ltd/CodeIgniter/commit/7294d40faf9f04caa87e283f4c4a16bbb853b36e). Most (all?) of these already had no effect since PHP 8.0.