- var_dump: documentation ( source)
<?php
$html = '<html><body><a href="/page?param=1&param=2">Text.</a></body></html>';
$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXpath($dom);
foreach($xpath->query('//a/@href') as $node)
{
var_dump($node->value);
}