Hi there,
Again & again I'm surprised that semi-pro or even pro people ask questions like this as it is these days as simple as! Just research - search for anything & everything. I'm myself come from an AS3 background yet had to learn reasonably well 7 languages including Php before I started AS# & FLEX2, 3 etc.

The biggest mistake I found and find always again is that people are not brought minded enough to use search provider which do not start with the Big-G, and which by the way is the upper most useless one to use as it comes up with old and over & over again the same Info which is most of the time also connected to dead Links! use something else and try country selected searches and you will in asking your questions with completely different answers I do this now for over 14 yea, but find that AOL can be of great help or even better Start Page web Search! & very good Cluster Search Provider .... and so on.
I'm sure once you get the rush with Php you will find that this is one of the good languages to use with AS3 FLEX or Flash etc. regards aktell