1/ Building PHP Extension with Rust for Fun and Profit https://ahmadrosid.com/blog/create-php-extension-with-rust
2/ A C++ library for developing PHP extensions https://www.php-cpp.com/
3/ Getting Started with PHP Extension Development via PHP-CPP https://www.sitepoint.com/getting-started-php-extension-development-via-php-cpp/
4/ PHPER (PHP Enjoy Rust) https://github.com/phper-framework/phper?tab=readme-ov-file