<?php

function closetags($html) {

preg_match_all('#<([a-z]+)(?: .*)?(?<![/|/ ])>#iU', $html, $result);

$openedtags = $result[1];

preg_match_all('#</([a-z]+)>#iU', $html, $result);

$closedtags = $result[1];

$len_opened = count($openedtags);

if (count($closedtags) == $len_opened) {

return $html;

}

$openedtags = array_reverse($openedtags);

for ($i=0; $i < $len_opened; $i++) {

if (!in_array($openedtags[$i], $closedtags))

{

$html .= '</'.$openedtags[$i].'>';

} else {

unset($closedtags[array_search($openedtags[$i], $closedtags)]);

}

}

return $html;

} ?>