function backdrop_add_html_head_link

1 common.inc backdrop_add_html_head_link($attributes, $header = FALSE)

Adds a LINK tag with a distinct 'rel' attribute to the page's HEAD.

This function can be called as long the HTML header hasn't been sent, which on normal pages is up through the preprocess step of theme('html'). Adding a link will overwrite a prior link with the exact same 'rel' and 'href' attributes.

Parameters

array $attributes: Associative array of element attributes including 'href' and 'rel'.

bool $header: Optional flag to determine if a HTTP 'Link:' header should be sent.

9 calls to backdrop_add_html_head_link()

backdrop_add_feed in core/includes/common.inc: Adds a feed URL for the current page.
drupal_add_html_head_link in core/includes/drupal.inc: Adds a LINK tag with a distinct 'rel' attribute to the page's HEAD.
file_view_page in core/modules/file/file.pages.inc: Menu callback; view a single file entity.
node_page_view in core/modules/node/node.module: Page callback: Displays a single node.
taxonomy_term_page in core/modules/taxonomy/taxonomy.pages.inc: Menu callback; displays all nodes associated with a term.

... See full list

File

core/includes/common.inc, line 3371: Common functions that many Backdrop modules will need to reference.

Code

function backdrop_add_html_head_link($attributes, $header = FALSE) {
  $element = array(
    '#tag' => 'link',
    '#attributes' => $attributes,
  );
  $href = $attributes['href'];

  if ($header) {
    // Also add a HTTP header "Link:".
    $href = '<' . check_plain($attributes['href']) . '>;';
    unset($attributes['href']);
    $element['#attached']['backdrop_add_http_header'][] = array('Link', $href . backdrop_http_header_attributes($attributes));
  }

  backdrop_add_html_head($element, 'backdrop_add_html_head_link:' . $attributes['rel'] . ':' . $href);
}