In my opinion, when PHP is compared to java, PHP is too easy to learn.
This is what caused a lot of half-baked PHP programmer to come up here and there, and claim to be good web developer when they know the syntax by heart, but not when or where to use them.
I've worked with several PHP programmers. Some of them comes from Java background, and they're the better ones. Others came from different fields, and they write sloppy codes most of the time. When stuck, they would search for code snippets from the web and slap them in our scripts, without really thinking what the snippets did or how those need to be changed to do our needed logics.
Granted, my experience is limited to less than 30 people so far. But from the mess I've seen, I think PHP is too easy to learn it didn't teach good programming practice.
But then again, a programming language is a programming language is a programming language.
Learning the syntax is not that hard, thanks to the manuals.
It's learning when, where, and how to use the syntax that's hard.