Re: Regular expression help?

Jas wrote:

Adam Bregenzer wrote:

On Mon, 2004-02-02 at 14:15, Jas wrote:

I have tried this but its not working.

             !eregi("^[0-9a-fA-F]{2}\:[0-9a-fA-F]{2}\:[0-9a-fA-F]{2}\:[0-9a-fA-F]{2}\:[0-9a-fA-F]{2}\:[0-9a-fA-F]{2}$",$_POST['mac']) 

so it should match 2 characters 0-9a-fA-F each block of 2 characters is followed by a : and repreated in 6 blocks.

That's a long expression, try: !preg_match('/^([0-9a-f]{2}($|:)){6}/i', $_POST['mac']); This pattern finds 6 matches of a number or letter (the /i means case-insensitive) followed by either a ':' or the end of the string.

Thanks, that worked like a charm. Jas

You may want to check out The Regex Coach. It's very helpful. :-) http://www.weitz.de/regex-coach/ -- paperCrane <Justin Patrin>