composer/xdebug-handler

A lightweight solution for running code concurrently in PHP

Xdebug — Step Debugger and Debugging Aid for PHP

Executes commands in sub-processes

low-overhead sampling profiler for PHP 7+

A sampling profiler or a memory usage profiler for PHP written in PHP, which reads information about running PHP VM from outside the process. You can find performance bottlenecks or memory leaks of your scripts without changing the target script or loading extensions.

A REPL for PHP

A PHP fast CGI client for sending requests (a)synchronously to PHP-FPM

⚡ PHP Engine Direct API