First, laserlight can code.
Second, I was forced out of my high school due to internet related security stuff ... long story.
Third, I have no college degree.
Forth, I like to make lists.
Fifth, I am Zend certified in PHP5. It wasn't that hard, but I had about 5 or 6 years of exposure to PHP before I took it. I hacked together web sites, modded open source software and built my own software. 2 years might be enough experience to pass it, it all depends on how much interaction and how intimate you get with PHP on a daily/weekly basis.