I've been approached by 2 people to mentor them in coding, and neither worked very well, but it was primarily my fault. In one case, we just had a lot of communication problems for a few weeks (probably mostly my fault) but expectations weren't set on both sides early on (regular times to meet, goals, etc). In the other case, we ended up discussing things a bit more and decided that's not what he was really after.

That said, feel free to reach out to me if you'd like to discuss it, and perhaps we might be a fit (or I might know someone who is for your needs).

http://phpmentoring.org/ is a site set up to help people match up with each other, but I've no idea what sort of success any of them have had.