Although PHP and Ruby on Rails are used for similar purposes, their online reputations are miles apart. Ruby is often referred to as a beautiful language, while PHP is sometimes dismissed as a haven for bad code or as a language for beginners. While there is some truth in all these observations, a casual job search still shows more open jobs for PHP developers than Rails developers, and many of the largest sites on the Internet use PHP (at least partially) as their back-end.
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