I don't understand. The point of my comment was that from my experience PHP code always has worse quality than code written in other programming languages. It's a broad assumption and I have no proofs. But it is my experience, I've never seen exceptions. Any PHP codebase I've looked at, had lots of issues with code readability, maintainability, robustness, security.

I think it was a huge mistake to allow mixing code and HTML. On the other hand, without this feature, PHP probably wouldn't become popular at all.