too long

Here is my code:

<?php
    $url = "http://www.sportsdirect.com/adidas-goletto-mens-astro-turf-trainers-263244?colcode=26324408";   

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSLVERSION, 3);
    curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
    curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
    curl_setopt($curl, CURLOPT_VERBOSE, true);
    $str = curl_exec($curl);  
    curl_close($curl);  


    libxml_use_internal_errors(true); 
    $doc = new DOMDocument();
    $doc->loadHTMLFile($str);

    $xpath = new DOMXpath($doc);

    $name  = $doc->query('//span[@id="ProductName"]')->item(0)->nodeValue;

    echo $name;

?>  

I am trying to get the name of the product but i receive:

Fatal error: Call to undefined method DOMDocument::query() in /public_html/test.php on line 24

Can you please help me out resolve my problem and find my mistake because i am stuck on this problem for hours?

I just want to get the name of the product which is contained in span element with id ProductName.

Thanks in advance!

You can get the desired result by using PHP regexes:

<?php
$url = "http://www.sportsdirect.com/adidas-goletto-mens-astro-turf-trainers-263244?colcode=26324408";   

$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl, CURLOPT_SSLVERSION, 3);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
curl_setopt($curl, CURLOPT_VERBOSE, true);
$str = curl_exec($curl);  
curl_close($curl);

preg_match_all("/id=\"ProductName\"(.+?)>(.+?)</", $str, $str_out);

$name = $str_out[2][0];

echo $name;
?>

This works using preg_match_all() to extract the product name.