I hate php developers.
Employers love them because they are dime a dozen, and they are easily replaced - pick random teenager off the street and he can code in php with 60% chance. The other 40% can learn in 3 days, because the language is 'easy'.
So a bunch of teenagers without any real-world experience gather and start writing some site. In the beginning everything is cool, the software platform is free, development is rapid.
The troubles start months or years later. Site becomes popular and performance and scalability problem arise. Most of the developers have left the company in the meantime, and what they've left behind is not scalable, documented, structured or maintainable in any way.
Money is thrown in hardware at first, with the blind faith that enough CPU power will resolve the problems. But it never does in the long run.
Then the professionals come to wipe behind the 'developers' and the world starts turning again, with the price paid in lost customers, lost profits and so on.
This happens all the time and is one of the reasons for the sorry state of many software projects - from games to plane ticket reservation systems.
Now don't get me started on tech support issues ;)