ip正则匹配 - php

preg_match_all ("#(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}) (\d{1,4})#",
                $str, $phones);
$arr = array_unique($phones);
foreach($arr[0] as $v){
    $v = str_replace(' ',':', $v);
    echo $v .  "\n";