PHP Getting and Setting tag attributes

Question

im being played by php and DomDocument.... basically i have some html saved in db. With anchor tags with different urls.... i want to force anchor tag hrefs not within allowedur

Answer 1

Thanx Charles.... came up with this

function contains_bad_urls($href,$allowed_urls)
{
    $x=pathinfo($href);
    $bn=$x['filename'];
    if (array_search($bn,$allowed_urls)>-1)
    {
        return false;
    }   
    return true;
}

function CleanHtmlUrls($str)
{
    $allow_urls = array('viewprofile','viewwall');//change these to whatever filename
    $doc = new DOMDocument();
    $doc->loadHTML($str);
    $doc->formatOutput = true;
    $anchors = $doc->getElementsByTagName('a');
    foreach($anchors as $anchor)
    {
    $anchor->setAttribute('onclick','#');
        if(contains_bad_urls($anchor->getAttribute('href'),$allow_urls)) 
        {
            $anchor->setAttribute('href', '#');
        }
    }
    $ret=$doc->saveHTML();
    return $ret
}