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PCRE library

8.19 PCRE library interface

The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl, with just a few differences. The current implementation of PCRE (release 4.x) corresponds approximately with Perl 5.8, including support for UTF-8 encoded strings. However, this support has to be explicitly enabled; it is not the default.