A demo PHP extension implmented with Rust (see here) and glued with PHP-CPP.
Rust doesn't generate header and other related files automatically; therefore, you have to implement it by yourself. In this demo case, put matrix.h to /usr/local/include and libmatrix.so, generated from our Rust project, to /usr/local/lib. Then, add the path /usr/local/lib to /etc/ld.so.conf.d/matrix.conf. Finally, feed the following commands:
$ make
$ php -dextension=`pwd`/matrix.so main.php