Web Hosting Talk : Web Hosting Main Forums : Programming Discussion : PHP ereg Help

[Mexico Joe]

My regular expression skills are pretty rusty. If I have a line like this:

Sep 12 16:14:34 test xinetd[870]: START: smtp pid=620 from=123.231.123.231

and I want to extract only the IP address at the end, how do I do this with ereg? I tried:

ereg("from=.*", $line, $array)

but this returns "from=123.321.123.321" and I want the IP only without the "from=". I realize I could strip out the "from=" with str_replace, but it would be nice to do it in one step if possible.

[cortices]

I haven't tested this at all but perhaps you might try something like this for the regexp...

([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)$

That should match 4 sets of 1 or more numeric characters seperated by dots at the end of a string.

[digitok]

If your line is always going to be 'from=[ip]' then you can do:

preg_match('/from=(.*)/',$string,$matches);

$matches[1] will hold the IP.