Ranked in these QuestionsQuestion Ranking
Pro Frameworks support
Supports Symfony2, Yii frameworks and Laravel.
Pro PHPDoc support
PHPDoc is a documentation generator. It allows automatically generating documentation from specifically formatted comments.
Pro Phar package recognition
Phar support allows running complete applications out of .phar files.
Pro Auto sync remote folder
It allows monitoring code and sync the files that need to be changed with a remote server. This works more efficiently than libnotify and faster than vagrant auto rsync.
Pro External command support
Ability to setup custom external commands, which is something inherited from eclipse and found lacking on netbeans.
Intelligent coding assistance.
Pro Plugins allow futureproofing and customization
Active development work on plugins is always a plus, as it can extend the use of the IDE.
Pro Built-in debugger
Has built in support for Xdebug including remote debugging.
Pro Inspections of all kinds
Pro Has built-in console and SSH clients
This allows execution of needed commands without switching to other windows. It also keeps track of what's happening right in the IDE, which is especially good with Vagrant, because you can connect to a VM in a single click.
Pro Database view
The database tab, while not perfect, provides all the tools you need for daily usage. You always have your DB overview on the side (you can hide it when not needed).
Pro Integrated Vagrant support
It recognizes Vagrantfile and allows full control from the IDE.
Pro Responsive core developers
Pro It comes with Testing RESTful Web Services
Save time of building your own or integrating libraries for testing RESTful Web Services. PHPStorm enables you to test endpoints without leaving your workspace or disrupting your workflow . You can code your endpoints in one window and test it immediately from another window.
Con Resource exhaustive
It often maxes out even 4 cores, not to mention several hundred MBs of RSS with a single small project opened.
It is not free software (free as in freedom).
Con Interface is cluttered
Currently costs £78 but does not seem to offer much more than some free counterparts.