Question

im trying to make a function that returns the inner HTML of a div with a spesific classname.
i searched around and people seem to say xpath query is the way to go.
this is what i got:

function getDivContent($html, $classname) {
$dom = new DOMDocument();
@$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$result = $xpath->query('//div[class="'.$classname.'"]');
return $result;
}

but it only returns:

object(DOMNodeList)#3 (0) { }

anyone can spot the error?

EDIT: The solution:

function nodeContent($n, $outer=false) { 
    $d = new DOMDocument('1.0'); 
    $b = $d->importNode($n->cloneNode(true),true); 
    $d->appendChild($b); $h = $d->saveHTML(); 
    // remove outter tags 
    if (!$outer) $h = substr($h,strpos($h,'>')+1,-(strlen($n->nodeName)+4)); 
    return $h; 
} 

function getDivContentByClass($html, $class) {
    $query = "//div[@class='$class']";
    $dom = new DOMDocument();
    @$dom->loadHTML($html);
    $xpath = new DOMXPath($dom);
    $result = $xpath->query($query);
    $data = nodeContent($result->item(0));
    return $data; 

}

Answer 1

xpath’s query function returns a NODEList, which is essentially an array of the results, even if there’s only a single matching node.

return $result->item(0);

will return the first matching node only. To get the content, you can use $result->item(0)->nodeValue, which acts equivalently to .innerHTML.