PHP is the standard bearer for the expert beginner. People write something that seems to be working quite quickly, so they feel they "get it" and know what they are doing. And then they stagnate and stay like that for 5, 10, 15 years even and never learn more. And then when presented with things they don't know, they resort to anti-intellectual rhetoric and trying to convince themselves that those things are "just a different way of doing it but no better than how I do it" and stay there in their rut forever thinking themselves an expert.
http://www.daedtech.com/tag/expert-beginner