JetBrains PhpStorm

JetBrains PhpStorm screenshots

PhpStorm is an Integrated Development Environment for the PHP developers
Quick Start Window
JetBrains PhpStorm 6.0 : Quick Start Window

Alternative downloads

Rapid PHP
Rapid PHP editor is a faster and more powerful PHP editor.
HTML To PHP Converter
It is a program that helps web developers to convert HTML into PHP.