Bing Site Search in PHP with Pagination

<?php
define('TITLE', 'Search Results');
include('header.php');

$config['appid'] = "01234567890"; // change this
$config['search_domains'] = array("domain1.com", "domain2.com");
$config['results_per_page'] = 20;

$url = "http://$_SERVER[HTTP_HOST]$_SERVER[PHP_SELF]";
?>

<?php echo (isset($_REQUEST['q']) ? "<h1>Search Results</h1>" : "<h1>Search</h1>"); ?>
<form method="get">
    <div style="text-align:right">
        <input type="text" id="q" name="q" value="<?php echo (isset($_REQUEST['q']) ? $_REQUEST['q'] : 'Search...'); ?>"/>
        <input type="submit" value="Search" name="submit" id="searchButton" />
    </div>
</form>

<?php
if (isset($_REQUEST ['q'])) {
    $query = htmlentities($_REQUEST ['q']);
    if (strlen($query) < 1)
        echo "You didn't type anything!";
    else {
        if (isset($_REQUEST ['page'])) {
            $page = htmlentities($_REQUEST ['page']);
            $offset = (($page - 1) * $config['results_per_page']);
        } else
            $offset = 0;

        $result = "http://api.search.live.net/json.aspx?Appid={$config['appid']}&sources=web";
        $result .= "&query=" . urlencode("site:" . implode(" OR site:", $config['search_domains']) . " " . $query);
        $result .= "&Web.Count={$config['results_per_page']}&Web.Offset=$offset";
        //echo $result;
        $result = file_get_contents($result);
        $result = json_decode($result);
        echo('<ul ID="resultList">');
        foreach ($result->SearchResponse->Web->Results as $value) {
            echo('<li class="resultlistitem"><a href="' . $value->Url . '">');
            echo('<h3>' . $value->Title . '</h3></a>');
            echo('<p>' . $value->Description . '</p>');
        }
        echo("</ul>");




//        echo("<pre>");
//        print_r($result);
//        echo("</pre>");
        $results = $result->SearchResponse->Web->Total > 1000 ? 1000 : $result->SearchResponse->Web->Total;
        if ($results > 0)
            echo $results . " results <br />\n";
        else
            echo "Sorry, no results to display. <br />\n";

        $pages = (int) ($results / $config['results_per_page']);
        // echo "$pages pages <br />\n";
        // pagination
//        echo "Page #s:<br />";
        for ($i = 1; $i <= $pages; $i++) {
            echo "<a href=$url?q=$query&page=$i>$i</a>  ";
        }
    }
}
?>

<?php include('footer.php'); ?>