function _nodewords_output_tags in Nodewords: D6 Meta Tags 6

Same name and namespace in other branches

1. 6.3 nodewords.module \_nodewords_output_tags()
2. 6.2 nodewords.module \_nodewords_output_tags()

Render the meta tag values as HTML.

Parameters

$tags: An array of tags.

$output_type: The type of output, 'head' (default), or 'update index'.

Return value

A string containing the HTML output for the META tag.

2 calls to _nodewords_output_tags()

nodewords_nodeapi in ./nodewords.module

Implements hook_nodeapi().

nodewords_preprocess_page in ./nodewords.module

Implements hook_preprocess_page().

File

./nodewords.module, line 1429

Implement an API that other modules can use to implement meta tags.

Code

function _nodewords_output_tags($tags, $output_type = 'head') {
  $output = array();
  $tags_info = nodewords_get_possible_tags();
  $weights = array();
  foreach ($tags as $name => $content) {
    if ($content === '') {
      continue;
    }

    // Check if it's a property meta tag (which may contain an XML namespace).
    $is_property = $output_type == 'head' && isset($tags_info[$name]['templates']['head'][$name]) && $tags_info[$name]['templates']['head'][$name] == NODEWORDS_META_PROPERTY;
    $parts = $is_property ? array(
      $name,
      $name,
    ) : explode(':', $name);

    // Ensure that the previous assigned output template was cleared.
    $template = NULL;
    if (!isset($parts[1])) {
      $parts[1] = $parts[0];
    }
    if ($output_type == 'update index') {
      $bool = isset($tags_info[$parts[0]]['templates']['search index'][$parts[1]]);
      if ($bool) {

        // The '%content' element will be added later.
        $replace = array(
          '%attributes' => empty($tags_info[$parts[0]]['attributes'][$parts[1]]) ? '' : drupal_attributes($tags_info[$parts[0]]['attributes'][$parts[1]]),
        );
        $template = $tags_info[$parts[0]]['templates']['search index'][$parts[1]];
        $weight = isset($tags_info[$parts[0]]['weight'][$parts[1]]) ? $tags_info[$parts[0]]['weight'][$parts[1]] : 0;
      }
    }
    else {
      $bool = isset($tags_info[$parts[0]]['templates']['head'][$parts[1]]) && ($meta_name = check_plain(decode_entities(strip_tags($parts[1]))));
      if ($bool) {

        // The '%content' element will be added later.
        $replace = array(
          '%name' => $meta_name,
          '%attributes' => empty($tags_info[$parts[0]]['attributes'][$parts[1]]) ? '' : drupal_attributes($tags_info[$parts[0]]['attributes'][$parts[1]]),
        );
        $template = $tags_info[$parts[0]]['templates']['head'][$parts[1]];
        $weight = isset($tags_info[$parts[0]]['weight'][$parts[1]]) ? $tags_info[$parts[0]]['weight'][$parts[1]] : 0;
        if (!is_string($template)) {
          switch ($template) {
            case NODEWORDS_META:
              $template = '<meta name="%name" content="%content"%attributes />';
              break;
            case NODEWORDS_HTTP_EQUIV:
              $template = '<meta http-equiv="%name" content="%content"%attributes />';
              break;
            case NODEWORDS_LINK_REL:
              $template = '<link rel="%name" href="%content"%attributes />';
              break;
            case NODEWORDS_LINK_REV:
              $template = '<link rev="%name" href="%content"%attributes />';
              break;

            // This requires theme customizations in order for the output to
            // remain valid XHTML, see the OpenGraph section of the README.txt
            // for further details.
            case NODEWORDS_META_PROPERTY:
              $template = '<meta property="%name" content="%content"%attributes />';
              break;
            default:
              $template = '';
              break;
          }
        }
      }
    }
    if (!empty($template)) {

      // Allow the meta tags to have multiple values.
      if (!empty($tags_info[$name]['multiple'])) {
        $content = explode("\n", $content);
      }

      // Simplify the output handling.
      if (!is_array($content)) {
        $content = array(
          $content,
        );
      }

      // Now add the content element(s) to the replacement array.
      foreach ($content as $content_item) {
        $replace['%content'] = str_replace('&#039;', "'", trim(check_plain(decode_entities(strip_tags($content_item)))));
        $output[] = strtr($template, $replace);
        $weights[] = $weight;
      }
    }
  }
  if (count($output)) {
    array_multisort($weights, $output);
    return implode("\n", $output);
  }
  else {
    return '';
  }
}