napa182 commented on a Page, Very Simple Time Counter (Cronometer) - Dec 17, 2009

the $ Matches the end of a string and the /iS the i case-insensitively and S acts like $strip

if you want to learn them read up on a few tutts you can start with this one http://www.hawkee.com/phpBB2/viewtopic.php?t=9764

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