I am about to start the implementation of a site which must be :
- capable of handling PostGreSQL db efficiently
- secure, so SSL has to be used
- the product's catalogs have to be changed by other people, so a bunch of people has to have access to the DB ( security is ... )
- highly dynamic because I don't want to spend a lot of time updating maintening it.

Should I go for Zope or PHP ? I have read that it is sometimes possible to mix it ?

Thank you for any advice !