Koding
Codeanywhere
AWS Cloud9
goormIDE
Codiad
PaizaCloud
SourceLair
Glitch
CodeLobster PHP Edition
Kodiak PHP
Rapid PHP
NuSphere PhpEd
Coder
PhpStorm
Adobe Dreamweaver
Nova
I like this editor very much. It works fast and has advanced autocomplete for HTML, CSS, JS and PHP. Also it includes special plug-ins for all popular frameworks: Drupal, WordPress, Joomla, Yii, jQuery, Angular and so on.
Codeanywhere - Codeanywhere is a complete toolset for web development. Enabling you to edit, collaborate and run your projects from any device.
Kodiak PHP - Kodiak PHP can run any PHP code directly (offline) on your iPad, no need for an internet connection.
AWS Cloud9 - AWS Cloud9 is a cloud-based integrated development environment (IDE) that lets you write, run, and debug your code with just a browser.
Rapid PHP - Rapid PHP editor is the world's fastest and lightest PHP IDE for Windows with code intelligence and tools for PHP, HTML, CSS, and JavaScript, including PHP debugger, FTP/SFTP client, UTF-8 support and more.
goormIDE - goormIDE is a cloud IDE service to maximize the productivity for developers and teams. Develop and deploy your service with powerful collaborative features, anytime and anywhere.
NuSphere PhpEd - PhpED - PHP IDE integrated development environment for developing web sites using PHP, HTML, Perl, JScript and CSS that combines a comfortable editor, debugger, profiler with the MySQl, PostrgeSQL database support based on easy wizards and tutorials.