function usp_display_form($atts = array(), $content = null)
{
    global $usp_options;
    if ($atts === true) {
        $redirect = usp_currentPageURL();
    }
    if ($usp_options['usp_form_version'] == 'classic') {
        ob_start();
        include WP_PLUGIN_DIR . '/' . basename(dirname(__FILE__)) . '/views/submission-form-classic.php';
        return ob_get_clean();
    } else {
        ob_start();
        include WP_PLUGIN_DIR . '/' . basename(dirname(__FILE__)) . '/views/submission-form.php';
        return ob_get_clean();
    }
}
function usp_display_form($atts = array(), $content = null)
{
    global $usp_options;
    $default = WP_PLUGIN_DIR . '/' . basename(dirname(__FILE__)) . '/views/submission-form.php';
    $custom = WP_PLUGIN_DIR . '/' . basename(dirname(__FILE__)) . '/custom/submission-form.php';
    if ($atts === true) {
        $redirect = usp_currentPageURL();
    }
    ob_start();
    if ($usp_options['usp_form_version'] == 'custom' && file_exists($custom)) {
        include $custom;
    } else {
        include $default;
    }
    return apply_filters('usp_form_shortcode', ob_get_clean());
}