I just found out about this IDE, with eclipse being very slow. I may start using this.
PHP IDE :: JetBrains PhpStorm: "Lightweight and Smart PHP IDE
PhpStorm is a lightweight and smart PHP IDE focused on developer productivity that deeply understands your code, provides smart code completion, quick navigation and on-the-fly error checking. It is always ready to help you shape your code, run unit-tests or provide visual debugging."