Here

<?php

    //Usually this would be in a seperate "require('config.php');" for organization, but meh...
    $db['host'] = "whateverhost";
    $db['name'] = "whatevername";
    $db['user'] = "whateveruser";
    $db['pass'] = "whateverpass";


    $mysqli = new mysqli($db['host'], $db['user'], $db['pass'], $db['name']);

        if ($mysqli->connect_error) {
            die('Connect Error (' . $mysqli->connect_errno . ') '
                    . $mysqli->connect_error);
    /**
    * Usage:
    * getDomain();
    * returns "example.com" ... "othersite.com" ... etc and insterts directly to a database
    *
    */
    function getDomain()
    {

        $content = file_get_contents('http://mailinator.com/randomdomain.jsp');
        $pattern = '^[a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5}$';

        preg_match($pattern, $content, $match);
        $domain = $match[1];

        $query = "SELECT FROM `tablename` WHERE domain='$domain'";
        $results = $mysqli->query($query);

        while($results) //This is me trying to figure out how to do a thing
        {
            $content = file_get_contents('http://mailinator.com/randomdomain.jsp');

            preg_match($pattern, $content, $match);
            $domain = $match[1];

            $query = "SELECT FROM `tablename` WHERE domain='$domain'";
            $results = $mysqli->query($query);
        }

        $query = "INSERT INTO `tablename` (domain) VALUES ('$domain')" //This needs to be modified
        $results = $mysqli->query($query);
        $results->free();
        $mysqli->close();

        return $domain;
    }

?>