I dont know of Source supports PHP anyway. I highly recommend moving to PHPNuke. Its a pretty kickass setup and you can add shitloads to it. Like live server stats and such.
Go to
www.phpnuke.org and download it. You will need a host though with PHP,MySQL and Apache server. If source has all those then you will have one sweet setup. Just get some graphics =)
PHPnuke +addons+blocks+hacks = ownage....
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Developer of EQ Living World Project. My Project will bring EQEmu alive for a great single player experiance or low number LAN players. Planning on having AI players that act like there just a normal player hunting in newbie fields to planes and they grow!
More info on Project here
Website Here