PhpStorm 2.0 (Q4 2010) 
- PHP
- "Any framework" support mechanism via ability to supply extensive metadata about autoload & magic infrastructure
- Zend framework support (zendtool, generators, specific navigations)
- Zend debugger support
- Refactoring
- Introduce field / constant
, inline variable
, safe delete
.
- Move / pull up / push down members
.
- Introduce field / constant
- Advanced code inspection
- full fledged PHP namespace support
- "Any framework" support mechanism via ability to supply extensive metadata about autoload & magic infrastructure
- Other
- New DVCS UI (Git, etc)
- RelaxNG support
- Mercurial support
- LESS support
- New DVCS UI (Git, etc)
- under consideration
- Flex (advanced coding assistance for ActionScript, MXML, code completion, inspections, etc)
- Property files / Freemarker / Velocity templates recognition
- Flex (advanced coding assistance for ActionScript, MXML, code completion, inspections, etc)
PhpStorm 1.0 (Q2 2010) 
- HTML/XHTML/XML/XSLT/XPATH
- JavaScript (laguage standart 1.6 with partial 1.7)
** Editing (syntax, code completion, code inspections, etc.)
** Refactoring
** Go to symbol, declaration
- Structure view
- Advanced support for frameworks (JSON, DoJo, JSDoc, jQuery, Prototype)
(check FAQ on other framework support)
- Structure view
- CSS
- PHP
** full 5.3 syntax support
** include resolution/file refs/completion
** variable type inference
- PHP code navigation
- PHP Debugger Setup wizard Wi-250
XDebug
- PHPDoc annotations support
- scope-aware code completion
- PHP refactorings: rename, introduce variable.
- advanced code inspections (visibility, type checking, etc)
- Language injection - SQL in PHP
, RegExp in PHP
- support for any type of outer language - HTML, CSS, XML, SQL, etc..
- Frameworks & libs: Smarty
(check FAQ on other framework support)
- PHP code navigation
- SQL
** syntax and error highlighting
** keywords, table and column names completion
** SQL Console
- generic SQL (SQL-92)
- MySQL
- SQLite
- generic SQL (SQL-92)
- Spell Checker
- FTP/SFTP sync
- XSLT
Try PhpStorm EAP
Legend
- Feature Implemented
- Under Investigation
- In Progress