How to PHP regex match an HTML document's title

php-regex-page-title.php

<?php
function parseTitle($html) {
	// Get the text in a <title>
	$matches = array();
	preg_match("/<title>(.*)<\/title>/is", $html, $matches);
	if (count($matches) > 1) {
		return trim($matches[1]);
	} else {
		return null;
	}
}
?>