A class to cut string that contains html tags

htmlcutter.php

<?php

/**
 * Class HTMLCutter
 */
class HTMLCutter
{
	/**
	 * Cut HTML
	 *
	 * @param string $text
	 * @param int    $max_length
	 *
	 * @return string
	 */
	public static function cut($text, $max_length)
	{
		$tags = array();
		$result = "";

		$is_open = false;
		$grab_open = false;
		$is_close = false;
		$in_double_quotes = false;
		$in_single_quotes = false;
		$tag = "";

		$i = 0;
		$stripped = 0;

		$stripped_text = strip_tags($text);

		while ($i < mb_strlen($text) && $stripped < mb_strlen($stripped_text) && $stripped < $max_length)
		{
			$symbol = mb_substr($text, $i, 1);
			$result .= $symbol;

			switch ($symbol)
			{
				case '<':
					$is_open = true;
					$grab_open = true;
					break;

				case '"':
					if ($in_double_quotes)
					{
						$in_double_quotes = false;
					}
					else
					{
						$in_double_quotes = true;
					}

					break;

				case "'":
					if ($in_single_quotes)
					{
						$in_single_quotes = false;
					}
					else
					{
						$in_single_quotes = true;
					}

					break;

				case '/':
					if ($is_open && !$in_double_quotes && !$in_single_quotes)
					{
						$is_close = true;
						$is_open = false;
						$grab_open = false;
					}

					break;

				case ' ':
					if ($is_open)
					{
						$grab_open = false;
					}
					else
					{
						$stripped++;
					}

					break;

				case '>':
					if ($is_open)
					{
						$is_open = false;
						$grab_open = false;

						array_push($tags, $tag);

						$tag = "";
					}
					elseif ($is_close)
					{
						$is_close = false;

						array_pop($tags);

						$tag = "";
					}

					break;

				default:
					if ($grab_open || $is_close)
					{
						$tag .= $symbol;
					}

					if (!$is_open && !$is_close)
					{
						$stripped++;
					}
			}

			$i++;
		}

		while ($tags)
		{
			$result .= "</" . array_pop($tags) . ">";
		}

		return $result;
	}
}