Extracting iframes from html content

gistfile1.php

<?php

// $buffer contains the HTML generated

$extracted	= array();
$pattern	= "#<iframe[^>]+>.*?</iframe>#is";

preg_match_all($pattern, $buffer, $matches);

if ( $matches ) {
	foreach($matches as $match) {
		$buffer = strtr($buffer, array($match[0] => ''));
		$extracted[] = $match[0];
	}
}

if ( $extracted ) {
	// we have iframe snippets from the html buffer
	// do something with these
}