PHP is easy than many other languages. It is an open source and also the documentation is freely available for any kind of scripting. Also there are so many frameworks built using PHP which really ease the task to develop a website. As a result there are many who prefer PHP as their programming langauge for web development.
+1 PHP was the second language I picked up after HTML.. It might not be the best out there but I really enjoy it and If you know how to structure your code/site properly then you won't have any problems with it. It's all about the foundation. I see far more PHP sites/apps on a daily basis as a developer than ASP. Not that I'm putting ASP down but after studying It in the MCSD I still prefer PHP.
As developers we shouldn't pigeon hole our self's into a select few languages. Every Language has it's strength's and that is where it should be applied. Thank goodness we have a choice.