Why so much hate for PHP?

For one, it's no secret that PHP was an amateur undertaking that inadvertently ended up powering >80% of the web.

It started off as a bunch of helper functions that were meant for Rasmus Lerdorf's personal use. He has frequently acknowledged that he was never particularly skilled and that PHP was never meant to be used on such a large scale. Among the countless WTF moments you would expect from a personal project, PHP once used strlen() as a hashing function. [1]

Thus, PHP ended up having a very inconsistent design and an awful typing system. It ended up becoming quite baroque, it has never had a formal specification and it has no coherent idea of what it wants to be. This is exemplified by PHP's relatively recent appropriation of Java idioms in an attempt to bring vague Nygaard OOP.

Third, it's fundamentally a templating language and it doesn't encourage any cohesive design patterns or practice. Most PHP sites don't even use frameworks, but rather go with the Mozart (or rather, spaghetti) style of copy-paste programming. There is no clear separation of concerns.

Fourth, the PHP community has always been dominated by amateurs. I can't really direct you to any objective statistics, but in general PHP has a disproportionately high amount of leechers and newbies, largely because it has been so deeply ingrained into the public consciousness as the de facto language of the web, without knowing of the better designed general-purpose alternatives.

Fifth, some concrete examples of PHP's horrific internals. [2] [3] [4]

Alternatives? Anything, really. Python, Ruby, Perl, Common Lisp, Haskell... whatever floats your boat. A minimal web framework is a trivial application to write. That's why there's so fucking many of the goddamned things.

[1] http://news.php.net/php.internals/70691

[2] http://www.phpwtf.org/

[3] http://www.phpsadness.com/

[4] http://me.veekun.com/blog/2012/04/09/php-a-fractal-of-bad-de... (the famous article)

Like many people, many years ago I learned php. It was easy to deploy, and make simple dynamic websites. Many hosting services provided support for it. I was quite happy to use it for these things.

Then in 2008 I interned at Facebook. At the time, there had not yet been any attempts to improve the language by Facebook itself. Using php in an actual codebase - real world software - made me realize just how terrible it was. I vowed to never use it again. I even presented some of the worst aspects of php in my intern presentation to the executive team. Mark was quite intrigued. At the time there were talks of how to deal with many of the problems, but nothing had been figured out by time I left.

Its deficiencies are too numerous to simply list here, so I'll give you a high level summary (which many have also said similar things). Php is a giant hacked language originally not designed for real software and then features added on. It's syntax is the worst of any used language; it's language features are severely lacking; its implementations are contradictory, confusing, and destructive. In short, it is not easy to read, it is easy to shoot yourself in the foot, it is not able to scale both in complexity and performance; and its libraries are a mess.