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7 filter.api.php hook_filter_FILTER_prepare($text, $filter, $format, $langcode, $cache, $cache_id)

Prepare callback for hook_filter_info().

Note: This is not really a hook. The function name is manually specified via 'prepare callback' in hook_filter_info(), with this recommended callback name pattern. It is called from check_markup().

See hook_filter_info() for a description of the filtering process. Filters should not use the 'prepare callback' step for anything other than escaping, because that would short-circuit the control the user has over the order in which filters are applied.


$text: The text string to be filtered.

$filter: The filter object containing settings for the given format.

$format: The text format object assigned to the text to be filtered.

$langcode: The language code of the text to be filtered.

$cache: A Boolean indicating whether the filtered text is going to be cached in {cache_filter}.

$cache_id: The ID of the filtered text in {cache_filter}, if $cache is TRUE.

Return value

The prepared, escaped text.


drupal/modules/filter/filter.api.php, line 203
Hooks provided by the Filter module.


function hook_filter_FILTER_prepare($text, $filter, $format, $langcode, $cache, $cache_id) {
  // Escape <code> and </code> tags.
  $text = preg_replace('|<code>(.+?)</code>|se', "[codefilter_code]$1[/codefilter_code]", $text);
  return $text;