RedBuld

function str_cut($html,$max_length=100,$ender=false,$cut_to_word=false)
    {
        $isUtf8 = true;
        $space_ended = true;
        $result_length = 0;
        $position = 0;
        $add_ender = false;
        $tags = array();

        $output = '';

        $re = $isUtf8 ? '{</?([a-z]+)[^>]*>|&#?[a-zA-Z0-9]+;|[\x80-\xFF][\x80-\xBF]*}' : '{</?([a-z]+)[^>]*>|&#?[a-zA-Z0-9]+;}';

        while($result_length < $max_length && preg_match($re, $html, $match, PREG_OFFSET_CAPTURE, $position))
        {
            list($tag, $tag_position) = $match[0];

            $str = substr($html, $position, $tag_position - $position);
            if ($result_length + strlen($str) > $max_length)
            {
                $output .= substr($str, 0, $max_length - $result_length);
                $result_length = $max_length;
                break;
            }

            $output .= $str;
            $result_length += strlen($str);
            if($result_length >= $max_length)
            {
                break;
            }

            if($tag[0] == '&' || ord($tag) >= 0x80)
            {
                $output .= $tag;
                $result_length++;
            }
            else
            {
                $tagName = $match[1][0];
                if($tag[1] == '/')
                {
                    $openingTag = array_pop($tags);
                    assert($openingTag == $tagName);
                    $output .= $tag;
                }
                elseif($tag[strlen($tag) - 2] == '/')
                {
                    $output .= $tag;
                }
                else
                {
                    $output .= $tag;
                    $tags[] = $tagName;
                }
            }
            $position = $tag_position + strlen($tag);
        }

        if($result_length < $max_length && $position < strlen($html))
        {
            $output .= substr($html, $position, $max_length - $result_length);
        }
        if($result_length == $max_length && $position < strlen($html))
        {
        	$add_ender = true;
        }

        if($cut_to_word)
        {
            $next_char = substr($html, $position+1,1);
            
            if(!preg_match('/\s/', $next_char))
            {
                $space_ended = false;
            }

            if(!$space_ended)
            {
                if(!empty($tags))
                {
                    $space_pos = strrpos($output,' ');
                    if($space_pos > 0)
                    {
                        $output = substr($output,0,$space_pos);
                    }
                }
                else
                {
                    $space_pos = strrpos($output,'<');
                    $space_pos = strrpos($output,' ',$space_pos);
                    if($space_pos > 0)
                    {
                        $output = substr($output,0,$space_pos);
                    }
                }
            }
        }

        if($ender and $add_ender)
        {
            $output = $output.(string)$ender;
        }
        while(!empty($tags))
        {
            $output .= '</'.array_pop($tags).'>';
        }
        return $output;
    }