add_action('wp_head', function() {
             ob_start();
        }, 0);

    add_action('wp_head', function() {
        $siteHeaderOutput = ob_get_clean();

        // just a variable that i'll be using in a transient
        $siteHasNoIndex = "not set";

        if (strpos($siteHeaderOutput, 'noindex') !== false) {
            $siteHasNoIndex = "no index";
            } else {
                    $siteHasNoIndex = "index ready";
            }

            // echo the header
            echo $siteHasNoIndex;

          // then set a transient for the admin panel
set_transient('escode_has_index', $siteHasNoIndex, DAY_IN_SECONDS);
            }, PHP_INT_MAX);