It's not PERL. Perl is not an acronym.
Re natural languages: there are things I can express in Esperanto, but not in Dutch. There are things I can express in Dutch, but not in English. I know these three languages fairly well. Funnily, it's exactly the other way around here: the easiest to learn language is also the most expressive one.
It is possible to use both Perl and PHP, but it is not easy. Once your mind thinks in maps, greps, arrays, lexicals, closures, namespaces and short circuiting operators, PHP is a major pain in the ass. You can still get the job done, but it hurts mentally and IMO, not much is worth that. (Note: do not read that as "that is not worth much")
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