function _linkchecker_check_markup in Link checker 7

Same name and namespace in other branches

1. 5.2 linkchecker.module \_linkchecker_check_markup()
2. 6.2 linkchecker.module \_linkchecker_check_markup()

Customized clone of core check_markup() with additional filter blacklist.

See https://api.drupal.org/api/function/check_markup/7 for API documentation.

2 calls to _linkchecker_check_markup()

_linkchecker_add_block_custom_links in ./linkchecker.module

Add custom block links to database.

_linkchecker_parse_fields in ./linkchecker.module

Parse the urls from entity.

File

./linkchecker.module, line 2327

This module periodically check links in given node types, blocks etc.

Code

function _linkchecker_check_markup($text, $format_id = NULL, $langcode = '', $cache = FALSE) {
  if (!isset($text)) {
    return '';
  }
  if (!isset($format_id)) {
    $format_id = filter_fallback_format();
  }

  // If the requested text format does not exist, the text cannot be filtered.
  if (!($format = filter_format_load($format_id))) {
    linkchecker_watchdog_log('filter', 'Missing text format: %format.', array(
      '%format' => $format_id,
    ), WATCHDOG_ALERT);
    return '';
  }

  // Check for a cached version of this piece of text.
  $cache = $cache && !empty($format->cache);
  $cache_id = '';
  if ($cache) {
    $cache_id = 'linkchecker:' . $format->format . ':' . $langcode . ':' . hash('sha256', $text);
    if ($cached = cache_get($cache_id, 'cache_filter')) {
      return $cached->data;
    }
  }

  // Convert all Windows and Mac newlines to a single newline, so filters only
  // need to deal with one possibility.
  $text = str_replace(array(
    "\r\n",
    "\r",
  ), "\n", $text);

  // Get a complete list of filters, ordered properly.
  $filters = filter_list_format($format->format);
  $filter_info = filter_get_filters();

  // Do not run placeholder or special tag filters used as references to nodes
  // like 'weblink' or 'weblinks' node types. If the original link node is
  // updated, all links are automatically up-to-date and there is no need to
  // notify about the broken link on all nodes having a link reference in
  // content. This would only confuse the authors as they may also not be able
  // to fix the source node of the reference.
  $filters_blacklist = array_keys(array_filter(variable_get('linkchecker_filter_blacklist', explode('|', LINKCHECKER_DEFAULT_FILTER_BLACKLIST))));

  // Give filters the chance to escape HTML-like data such as code or formulas.
  foreach ($filters as $name => $filter) {
    if (!in_array($name, $filters_blacklist)) {
      if ($filter->status && isset($filter_info[$name]['prepare callback']) && function_exists($filter_info[$name]['prepare callback'])) {
        $function = $filter_info[$name]['prepare callback'];
        $text = $function($text, $filter, $format, $langcode, $cache, $cache_id);
      }
    }
  }

  // Perform filtering.
  foreach ($filters as $name => $filter) {
    if (!in_array($name, $filters_blacklist)) {
      if ($filter->status && isset($filter_info[$name]['process callback']) && function_exists($filter_info[$name]['process callback'])) {
        $function = $filter_info[$name]['process callback'];
        $text = $function($text, $filter, $format, $langcode, $cache, $cache_id);
      }
    }
  }

  // Store in cache with a minimum expiration time of 1 day.
  if ($cache) {
    cache_set($cache_id, $text, 'cache_filter', REQUEST_TIME + 60 * 60 * 24);
  }
  return $text;
}