PhpStorm & Web Storm 2.0 (Q4 2010) 
- PHP (PhpStorm only!)
- "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: Smart introduce field
/ constant
, inline variable
, safe delete
.
- New code inspections
- Control flow / Unreachable statement
- Control flow / Wrong catch clauses order
- Probable bug / Wrong string concatenation operator
- Type compatibility / Invalid foreach() argument type
- Control flow / Unreachable statement
- full fledged PHP namespace support
- Structure view sorting and filtering
- "Any framework" support mechanism via ability to supply extensive metadata about autoload & magic infrastructure
- CSS
- LESS editor support
compilation support
- SASS 3 support
compilation support
- LESS editor support
- Language Injection
- New editor of injected fragments
- New editor of injected fragments
- Version control support
- New DVCS UI (Git, etc) with easy multiple repository branch switching, built-in log views and integrated cherrypicking, etc.
- Softwrap in code editor
, spellchecking an completion in all controls (i.e. commit dialog)
- Mercurial support
- New DVCS UI (Git, etc) with easy multiple repository branch switching, built-in log views and integrated cherrypicking, etc.
- Other
- Streamlined UI: more compact layout, better indication, better blending into OS style
- RelaxNG support
- Streamlined UI: more compact layout, better indication, better blending into OS style
PhpStorm & Web Storm 1.0 (Q2 2010) 
- HTML/XHTML/XML/XSLT/XPATH
- JavaScript (laguage standard 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)
- Editing (syntax, code completion, code inspections, etc.)
- CSS
- PHP (PhpStorm only!)
- full 5.3 syntax support
- scope-aware code completion
- PHP refactorings: rename, introduce variable.
- advanced code inspections (visibility, type checking, etc)
- Language injection - SQL in PHP
- support for any type of outer language - HTML, CSS, XML, SQL, etc..
- Frameworks & libs: Smarty
(check FAQ on other framework support)
- full 5.3 syntax support
- SQL (PhpStorm only!)
- syntax and error highlighting
- keywords, table and column names completion
- SQL Console
- generic SQL (SQL-92)
- MySQL
- SQLite
- syntax and error highlighting
- Spell Checker
- FTP/SFTP sync
- XSLT
Try PhpStorm EAP
Legend
- Feature Implemented
- Under Investigation
- In Progress