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    copied!<p>Lately, I do all my text parsing in Perl. If I needed regex's in another language, I'd go with <a href="http://www.pcre.org/" rel="nofollow noreferrer">PCRE</a>.</p> <blockquote> <p>The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl&nbsp;5. PCRE has its own native API, as well as a set of wrapper functions that correspond to the POSIX regular expression API. The PCRE library is free, even for building commercial software.</p> <p>PCRE was originally written for the <a href="http://www.exim.org/" rel="nofollow noreferrer">Exim MTA</a>, but is now used by many high-profile open source projects, including <a href="http://httpd.apache.org/" rel="nofollow noreferrer">Apache</a>, <a href="http://www.php.net/" rel="nofollow noreferrer">PHP</a>, <a href="http://www.kde.org/" rel="nofollow noreferrer">KDE</a>, <a href="http://www.postfix.org/" rel="nofollow noreferrer">Postfix</a>, <a href="http://www.analog.cx/" rel="nofollow noreferrer">Analog</a>, and <a href="http://nmap.org/" rel="nofollow noreferrer">Nmap</a>. PCRE has also found its way into some well known commercial products, like <a href="http://www.apple.com/safari/" rel="nofollow noreferrer">Apple Safari</a>. Some other interesting projects using PCRE include <a href="http://www.call-with-current-continuation.org/" rel="nofollow noreferrer">Chicken</a>, <a href="http://www.ferite.org/" rel="nofollow noreferrer">Ferite</a>, <a href="http://www.canonware.com/onyx/" rel="nofollow noreferrer">Onyx</a>, <a href="http://www.hypermail.org/" rel="nofollow noreferrer">Hypermail</a>, <a href="http://leafnode.sourceforge.net/" rel="nofollow noreferrer">Leafnode</a>, <a href="http://www.askemos.org/" rel="nofollow noreferrer">Askemos</a>, and <a href="http://www.wenlin.com/" rel="nofollow noreferrer">Wenlin</a>.</p> </blockquote> <p>PCRE is mature, and has the support of numerous projects. Apache and Apple both have a vested interest in making it high-quality. I doubt that any other RE library is likely to surpass it in both functionality and quality (or possibly either) anytime soon.</p>
 

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