Disabling New Relic agent injection

Acquia Support uses New Relic as a tool to help diagnose website performance problems. The New Relic service injects a small JavaScript agent into pages, allowing New Relic to gather data about the end user’s experience. This JavaScript injection may conflict with other JavaScript used on a website or cause validation errors, like the following validation error from Google’s AMP service:

The tag 'script' is disallowed except in specific forms.

New Relic’s documentation provides the newrelic_disable_autorum() method to disable the injection of the New Relic Browser JavaScript agent for the current transaction.

To apply this code to a Drupal website, add the code for your version of Drupal to the bottom of your website’s settings.php file, adjusting [path_to_ignore] to the actual pages or paths you don’t want the New Relic agent to be injected into.

if (isset($_SERVER['REQUEST_URI']) && strpos($_SERVER['REQUEST_URI'], '[path_to_ignore]') !== false ) {
  if (extension_loaded('newrelic')) { // Ensure PHP agent is available
    newrelic_disable_autorum();
    }
}

if (isset($_GET['q']) && strpos($_GET['q'], '[path_to_ignore]') === 0) {
  if (extension_loaded('newrelic')) { // Ensure PHP agent is available
    newrelic_disable_autorum();
    }