This script extracts IP-addresses from standart input

extract_ip.php

#!/usr/bin/php
<?php

$mask = '/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/';

while ($line = fgets(STDIN)) {
    if (preg_match_all($mask, $line, $matches)) {
        foreach ($matches[0] as $ip) {
            echo $ip, PHP_EOL;
        }
    }
}