I just started turning all of my sites to .php a few months ago, its definitely a learning curve but, the end results will save so much time its unreal.
I have a directory site right now that pulls everything from an SQL database and several smaller niche specific sites that pull from that same database, just on a more limited scale.
The sites logo, header, navigation, sidebar and main content are all template driven, in addition to the ad blocks on the site so, if anything needs changing, it can be done instantly across thousands of web pages, by changing one include file.
If you have the time, patience and drive, definitely start learning to do everything in .php I wish I had done so years ago, it would have saved me so much work over the years
