Web application requirements

• Object oriented style.
  
  
• MVC model
  http://framework.zend.com/
  
  
• Database abstraction layer (Model)
  
  
• Separation of Presentation (View) and Business Logic (Controllers),
  means using some templates engine (Smarty, Zend View)
  
  
• PHP coding standards
  http://framework.zend.com/manual/en/coding-standard.htmlPHP
  
  
• Comments in phpDocumentor format
  http://www.phpdoc.org
  
  
• API documentation
  http://framework.zend.com/apidoc/core/
  
  
• UML scheme of application (?)
  

• Database scheme
  

• Valid XHTML output

• SEO Friendly

Something else ?