// Match Fixture
    function all_forms($atts) { 

    ob_start(); // Start output buffering
    include ABSPATH . 'all-forms.php'; // Include the file from the root directory
    $content = ob_get_clean(); // Get the buffered content and clean the buffer
    return $content;
    } 
    // register shortcode
    add_shortcode('all_forms', 'all_forms');