I can't, for the life of me, find a decent feature comparison table of the Flash Builder 4.5 Premium and the Flash Builder 4.5 Premium for PHP (or it might be my poor site navigation skills). Can anyone detail their differences or point me to a table that states such?
What I had in mind was the Flash Builder 4.5 Premium for PHP is a trimmed down version of Flash Builder 4.5 Premium but apparently, the one with the PHP is more expensive by $100 than the one without.
Does this link help you?
http://www.adobe.com/devnet/flash-builder/articles/introducing-flashbuilder45-php.html
See sections: Easy Connection to PHP data services Integrated Flex and PHP Debugging
For example, in my Flash Builder 4.5 projects, I see no help with connecting/debugging PHP data services.