"Perl is a write-once language, which PHP isn't. Perl is so different from other languages, that each time you have to write something in Perl after not having programmed Perl for a while, you have to relearn. Therefore, only core Perl-hackers that more or less only program Perl, deliver high-quality Perl programs. The rest deliver buggy programs that will have to be rewritten from scratch next time they have to change a little. " from a reader review.