I think the parent comment is just describing some of the perceptions they've seen about PHP. I've done PHP work, but I've noticed the same perception. Also in my area, there's a lot of PHP work, but it's generally much lower paid. I know a lot of tech people here, and some of them are writing really modern PHP - for much lower pay than a .NET developer at a comparable job. It's definitely possible to do great work in PHP, and it's also definitely perceived (rightly or wrongly) at least in some circles to not be awesome.
