The Jetea Exception component.

composer require jetea/exception=~2.0 -vvv

1. vim index.php

   <?php
   require __DIR__ . '/vendor/autoload.php';
   
   $handler = new \Jetea\Exception\Handler();
   (new \Jetea\Exception\HandleExceptions($handler))->handle();
   
   //undefined variable: a
   echo $a;
   

2. Run php -S 127.0.0.1:9000

3. Open a browser window and navigate to http:https://127.0.0.1:9000. You should be able to see the debugger page.