Truncate HTML

gistfile1.txt

function truncate_html($text, $length = 30, $truncate_string = '...', $truncate_lastspace = false)
{
  // Don't truncate if visible (non-HTML) text length's already less than or equal to target length
  if (strlen(strip_tags($text)) <= $length)
  {
    return $text;
  }

  // Set working length
  $working_length = $length;

  do
  {
    $truncated = truncate_text($text, $working_length, $truncate_string, $truncate_lastspace);
    $stripped = strip_tags($truncated);

    // Return truncation if no HTML is present in truncated text
    if ($truncated == $stripped)
    {
      return $truncated;
    }

    // Increase truncation length to adjust for non-visible HTML tags
    $working_length++;

    // Redo truncation if visible (non-HTML) text length is less than target truncation length
  }
  while (strlen($stripped) < $length);

  // Clean up HTML (unclosed tags, etc.)
  $doc = new DOMDocument();

  // Suppress parsing warnings with @ and wrap in <p></p> (to avoid weird behavior)
  @$doc->loadHTML('<p>'. $truncated .'</p>', LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

  // Return, removing <p></p>
  return substr($doc->saveHTML(), 3, -5);
}