PhpStorm by JetBrains - The Smartest PHP IDE

The IDE that actually GETS your code. Supports PHP 5.3 & 5.4, modern and legacy projects. On the fly error prevention. Best autocompletion & Code Refactoring. Zero configuration debugging. Best JavaScript support included. Frequent updates. More information about PhpStorm.
Check Tutorials section. Read our blog. Follow us on Twitter. Join our forum.

Please report any bugs and file feature requests in issue tracker.
PhpStorm includes bundled evaluation license key for a free 30-day trial.
Download the latest stable release here.

Early Access Program builds are available here.

PhpStorm Development Roadmap
Step-by-Step Tutorials
Quickstart Guide
Product Web Site
Discussion Forum