I really could do without "considered harmful" titles. x86 has been one of the most influential technologies of all time and a clickbait title doesn't do it justice imo.
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How influential something is has nothing to do with how good it is.
http://eev.ee/blog/2012/04/09/php-a-fractal-of-bad-design/
It's amazing how much has been done in what was essentially a pile of hacks on top of a pre-processor making it pretend to be an application language. That pro's avoid it and its wiser users almost always leave it eventually further corroborates the author that it's fundamentally bad. If anything, it's one option among better ones (Python, Ruby) for non-programmers to get started in web apps. Little reason to use it at this point with all the 3rd party components and communities around better languages.