$html = file_get_contents('http://www.511yj.com');

$dom = new DOMDocument();

@$dom->loadHTML($html);

// grab all the on the page

$xpath = new DOMXPath($dom);

$hrefs = $xpath->evaluate("/html/body//a");

for ($i = 0; $i < $hrefs->length; $i++) {

       $href = $hrefs->item($i);

       $url = $href->getAttribute('href');

       echo $url.'<br />';

}