function backdrop_is_html

1 bootstrap.inc backdrop_is_html()

Detects if this is an HTML HTTP request.

This liberal detection considers all requests that lack an Accept header or X-Requested-With (as set by jQuery and other JavaScript libraries) to be an HTML request. Any other types of requests must specify X-Requested-With in order to be returned in an alternative format.

3 calls to backdrop_is_html()

admin_bar_preprocess_page in core/modules/admin_bar/admin_bar.module: Implements hook_preprocess_page().
layout_block_configure_form in core/modules/layout/layout.admin.inc: Form callback; Add or edit a block within a layout.
layout_route_handler in core/modules/layout/layout.module: Route handler callback; Execute the current route item or wrap in a layout.

File

core/includes/bootstrap.inc, line 4261: Functions that need to be loaded on every Backdrop request.

Code

function backdrop_is_html() {
  return empty($_SERVER['HTTP_ACCEPT']) || strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === 0 || empty($_SERVER['HTTP_X_REQUESTED_WITH']);
}