Close open HTML tags in a string

Question

Situation is a string that results in something like this:

This is some text and here is a bold text then the post stop here....
         


        

Answer 1

This PHP method always worked for me. It will close all un-closed HTML tags.

function closetags($html) {
    preg_match_all('#<([a-z]+)(?: .*)?(?#iU', $html, $result);
    $openedtags = $result[1];

    preg_match_all('##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)){
            $html .= '';
        } else {
            unset($closedtags[array_search($openedtags[$i], $closedtags)]);
        }
    }
    return $html;
}