On Wed, Oct 12, 2005 at 10:14:14PM -0500, Rich Smrcina wrote:
Is there an online reference for PCRE available, including examples? I'm having difficulty setting up alerts and I clearly need help with PCRE.
I did a google on "regular expression tutorial" and came up with this:
http://www.regular-expressions.info/tutorial.html
It isn't specific to PCRE, but PCRE implements the regex flavor found in Perl, so it should get you going.
Also, for trying out your regexes there's the "pcretest" utility which comes with the PCRE library. It lets you input your regex and try it out against selected candidate strings:
henrik at osiris:~$ pcretest PCRE version 4.5 01-December-2003
re> /(www|mail|ns).foo.com/ data> ns.foo.com 0: ns.foo.com 1: ns data> print.foo.com No match
Note that you must put the regex inside slashes when entering it into pcretest (it supports multi-line regexes - Hobbit doesn't).
Henrik