What are the bones of a Powerful CMS

Question

where im working is a company to improve their own market CMS , if u were me and u had the opportunity to build ur own CMS ( revision of existing CMS ) what steps u would take ?

as far as i know these things can be most important :

• template engine ( caching ability )
• a php framework ( ZEND)
• a javascript Framework ( Jquery )
• OOP coding style
• Security Issues (i have no idea how to make this happen , trying to obey security notes in writing php is enough or we should use any existing security)
• an auto updater script ( wondering how i can do it )

Answer 1

...and what about code maintainability?

And Documentation (even if youre the only working on the project: will you remember what that function does at 3 years from now?)

Caching, if is it possible, use memcached or apc to reduces the database hits, not only in the templating behavior.

Extensibility. Every famous cms nowadays have modules/plugins: write your code in order to allow them to be used (hook functions?). Dont see the plugin as an 'external' thing only: you will be glato to create a module to satisfy your costumer needs, instead of completely rebuild a part of your CMS.

Whitelist for security, htmlpurifier for html fields.

Follow strictly the MVC conventions (..even if this point is potentially subjective).

Answer 2

See how the POWER of frameworks is calculated and compared. Thanks

Core points include:

PHP4
PHP5
MVC
Multiple DB's
ORM
DB Objects
Templates
Caching
Validation
Ajax
Auth Module
Modules
EDP Routing