For me, just outputting variables only works when I know a method should be broken. I use Xdebug in PHP Storm (available on other IDE's and editors as well)

About debugging in PHP ¶. PHP is shipped with a basic command line interactive debugger, phpdbg. Most IDEs have support for » Xdebug, a free debug tool, ...

PHP Manual ¶ · Copyright · PHP Manual · Preface · Getting Started · Introduction · A simple tutorial · Installation and Configuration · General Installation ...

PHP Manual - Manual · Language Reference · PHP: PHP and COM · Hiding PHP

phpdbg aims to be a lightweight, powerful, easy to use debugging platform for PHP. It offers the following features: Step-Through Debugging; Flexible ...

Performs debugging operations using the Fred Fish debugging library. Parameters ¶. options. A string representing the debugging operation to perform. The debug ...

Interactive PHP Debugger ¶. Introduction · Installing/Configuring · Runtime Configuration · Predefined Constants · phpdbg Functions.

This function will resolve objects to their class name, resources to their resource type name, and scalar values to their common name as would be used in type ...

PHP is a popular general-purpose scripting language that powers everything from your blog to the most popular websites in the world.

Downloads · A simple tutorial · Documentation · My PHP.net

Turns on verbose request information useful for debugging, the debug information is stored in the debugInfo member. Alternatively, the debug member can be ...