According to this: http://www.vbulletin.com/forum/forum...n-for-vb-3-8-8 vb3.8.8 will work with php versions up to 5.4. I don't know the answer to the MySQL question, but I don't remember seeing anyone having any problems due to MySQL version (although they're usually talking about 5.x, and I've never heard of 6.2.5).