CodeLobster PHP Edition 3.8.1 is the latest version of a free portable Windows IDE. For those working with content management its PRO version has CMS-specific plug-ins and extra features.
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Its HTML/CSS code inspector helps locate code and styles anywhere in your web page. Debugging functions include Step Into and Step Over, and you can watch user variables, local variables, and the Call Stack as you step through the program.
Additional features, including code folding (collapsing), a portability option, highlighting of paired tags and attributes, tooltips that display the values of variables marked with your mouse cursor, class view, and a project manager.
It all goes to emphasize that PHP development is no longer a single entity but really does depend on what framework you are using and tools that help with these sub-ecologies of the bigger PHP ecology are to be welcomed.
Ten minutes to PHP