解析IP：来自字符串的端口，端口后面有字符＃

Question

I need a little help with this one and my RegEx knowledge is a little lacking with this one.

I have a proxy list that I'm trying to parse and separate the IP and port number from the string.

The string being read looks like this.(example 1)

121.121.121.121:8081    2.103384    Китай   high    05-07-2014 09:25:17

and sometimes look like (example 2)

222.222.222.222:8081

When I use this code.

preg_match_all('@[0-9]{1,4}\.[0-9]{1,4}\.[0-9]{1,4}\.@',$ip,$results);
$output = (preg_split('/:/',$results));
$ip = $output['0'];
$port = $output['1'];

It works great when there is just a IP:Port like in example #2 but in example #1 its also grabbing everything past the space so the port number looks like "8081 2.103384 Китай high 05-07-2014 09:25:17"

Is there a regex pattern I can use to have it stop at a space if it see's one?

Answer 1

With a split, you're only matching what you don't want; in this case you would want to have a match though.

The following matching expression should work in your case:

if (preg_match('/^(\d[\d.]+):(\d+)\b/', $proxy, $matches)) {
    $ip = $matches[1];
    $port = $matches[2];
}