When I am trying to call drupal_goto from hook_boot I get an error:

Fatal error: Call to undefined function drupal_goto()

What am I doing wrong and why is that happening?

My code:

function custom_mobile_redirect_boot() {
  include_once 'Mobile_Detect.php';
  $detect = new Mobile_Detect();
  if ($detect->isMobile() || $detect->isTablet()) {

1 Answer 1


In hook_boot() lot of APIs will not work as the required function definitions for them will not be loaded. In this case common.inc where drupal_goto() is defined is not yet included ergo you get that error. If its not possible to use hook_init() make use of Header. Check out mobile_tools module hook_boot() for more info.

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