symfony/web-profiler-bundle

Provides a tight integration of the Symfony VarDumper component and the ServerLogCommand from MonologBridge into the Symfony full-stack framework

Clockwork - php dev tools in your browser - server-side component

Provides a way to profile code

A configurable set of panels that display various debug information about the current request/response.

😎 Tracy: the addictive tool to ease debugging PHP code for cool developers. Friendly design, logging, profiler, advanced features like debugging AJAX calls or CLI support. You will love it.

Xdebug — Step Debugger and Debugging Aid for PHP

Provides a tight integration between Symfony components and the Symfony full-stack framework

A simple & straight-to-the-point PHP profiling extension with its built-in web UI

Provides tools to manage errors and ease debugging PHP code