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Regular expressions seem very powerful. Is there anywhere I can find out more about them?


The relevant section in the PHP manual at http://www.php.net/pcre will offer some information about regular expression syntax. You can also find some useful information at http://www.perldoc.com—in particular, an introduction to Perl regular expressions at http://www.perldoc.com/perl5.8.0/pod/perlretut.html. For a challenging but comprehensive guide to regular expressions, you should acquire Mastering Regular Expressions by Jeffrey Friedl.

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