function _filter_url

7.x filter.module _filter_url($text, $filter)
6.x filter.module _filter_url($text, $format)

URL filter. Automatically converts text web addresses (URLs, e-mail addresses, FTP links, etc.) into hyperlinks.

Related topics

Standard filters
Filters implemented by the filter.module.
1 call to _filter_url()
filter_filter in drupal-6.x/modules/filter/filter.module
Implementation of hook_filter().

File

drupal-6.x/modules/filter/filter.module, line 751
Framework for handling filtering of content.

Code

function _filter_url($text, $format) {
  // Pass length to regexp callback
  _filter_url_trim(NULL, variable_get('filter_url_length_' . $format, 72));

  $text = ' ' . $text . ' ';

  // Match absolute URLs.
  $text = preg_replace_callback("`(<p>|<li>|<br\s*/?>|[ \n\r\t\(])((http://|https://|ftp://|mailto:|smb://|afp://|file://|gopher://|news://|ssl://|sslv2://|sslv3://|tls://|tcp://|udp://)([a-zA-Z0-9@:%_+*~#?&=.,/;-]*[a-zA-Z0-9@:%_+*~#&=/;-]))([.,?!]*?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))`i", '_filter_url_parse_full_links', $text);

  // Match e-mail addresses.
  $text = preg_replace("`(<p>|<li>|<br\s*/?>|[ \n\r\t\(])([A-Za-z0-9._-]+@[A-Za-z0-9._+-]+\.[A-Za-z]{2,4})([.,?!]*?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))`i", '\1<a href="mailto:\2">\2</a>\3', $text);

  // Match www domains/addresses.
  $text = preg_replace_callback("`(<p>|<li>|[ \n\r\t\(])(www\.[a-zA-Z0-9@:%_+*~#?&=.,/;-]*[a-zA-Z0-9@:%_+~#\&=/;-])([.,?!]*?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))`i", '_filter_url_parse_partial_links', $text);
  $text = substr($text, 1, -1);

  return $text;
}