article close html tag

文章关闭标签函数

function CloseTags($html)

{

        // strip fraction of open or close tag from end (e.g. if we take first x characters, we might cut off a tag at the end!)

        $html = preg_replace('/<[^>]*$/','',$html); // ending with fraction of open tag

        // put open tags into an array

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

        $opentags = $result[1];

        // put all closed tags into an array

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

        $closetags = $result[1];

        $len_opened = count($opentags);

        // if all tags are closed, we can return

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

            return $html;

        }

        // close tags in reverse order that they were opened

        $opentags = array_reverse($opentags);

        // self closing tags

        $sc = array('br','input','img','hr','meta','link');

        // ,'frame','iframe','param','area','base','basefont','col'

        // should not skip tags that can have content inside!

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

        {

            $ot = strtolower($opentags[$i]);

            if (!in_array($opentags[$i], $closetags) && !in_array($ot,$sc))

            {

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

            }

            else

            {

                unset($closetags[array_search($opentags[$i], $closetags)]);

            }

        }

        return $html;

}