If you want to parse all the sets of numbers on a page that look like this:

21.234.571.21:8080

231.12.9.678:215

How would you go about doing it?

Is this OK?

[0-999].[0-999].[0-999].[0-999]:[0-9999]

Or is this not regex? I've tried it to form a regexp of expressions that start with and end with these features (instead of the typical before and after regex)  but it's not working and would greatly appreciate a little push. thanks.

have u tried to find regex for IP addresses in our library?

Following on from Sergei's advice, I see from your pattern that you have the wrong (but common) understnading of how character set definitions work. Can I suggest that youi read Michael Ash's blog entry at http://regexadvice.com/blogs/mash/archive/2008/01/31/A-touch-of-Character-Class.aspx to learn more about how these are used.

Susan

Hi guys thanks for your responses. I have indeed tried out http://regexlib.com/Search.aspx?k=ip%20address but maybe there are different types of Regex and Zennoposter uses one that isn't there.

ZP comes with quick regexpressions, like:

 (\d{1,3}\.){3}\d{1,3}

for proxies, and it works, finally a regex that works!!!: Can I ask you guys what regexp type is this, and given this what would you add to the end to add the port? thanks, will read the post entry, indeed mebbe the entire blog..

Will the port always be there or is it optional (I've assumed optional below)? Also, how many digits will there be in the port number (I've assumed 5 below)?

Try

(\d{1,3}\.)\d{1,3}(:\d{1,5})?

Susan

thanks, that works very nicely susan.

I'm still struggling a lot with regexp using things like Expresso, so would you mind if i ask you how you'd get the following into regular expression:

?t=53578

the numbers will vary and the t will be different letters of the alphabet. But I haven't figured out how to get a ? or a = into regexp yet. thanks.

actually nevermind, i really should learn to relax a little, looked it up in regular-expressions.info and expresso and built it in no time. \?t\=\d{5}

You  actually don't need to escape the '=': it does not do any harm to use the escape, but it does end up making the pattern harder to read - especially if you need to write the pattern as a string where the "\' character itself needs to be escaped (your pattern would then end up looking like "\\?t\\=\\d{5}").

Susan