/**
* Adds a ?nocache option for the checkout page
*
* This ensures the checkout page remains uncached when plugins like WP Super Cache are activated
*
* @since 1.4.1
* @param array $settings Misc Settings
* @return array $settings Updated Misc Settings
*/
function edd_append_no_cache_param($settings)
{
if (!edd_is_caching_plugin_active()) {
return $settings;
}
$settings[] = array('id' => 'no_cache_checkout', 'name' => __('No Caching on Checkout?', 'easy-digital-downloads'), 'desc' => __('Check this box in order to append a ?nocache parameter to the checkout URL to prevent caching plugins from caching the page.', 'easy-digital-downloads'), 'type' => 'checkbox');
return $settings;
}
/**
* Adds the 'nocache' parameter to the provided URL
*
* @since 2.4.4
* @param string $url The URL being requested
* @return string The URL with cache busting added or not
*/
function edd_add_cache_busting($url = '')
{
$no_cache_checkout = edd_get_option('no_cache_checkout', false);
if (edd_is_caching_plugin_active() || edd_is_checkout() && $no_cache_checkout) {
$url = add_query_arg('nocache', 'true', $url);
}
return $url;
}
/**
* Get the URL of the Checkout page
*
* @since 1.0.8
* @param array $args Extra query args to add to the URI
* @return mixed Full URL to the checkout page, if present | null if it doesn't exist
*/
function edd_get_checkout_uri($args = array())
{
$uri = edd_get_option('purchase_page', false);
$uri = isset($uri) ? get_permalink($uri) : NULL;
if (!empty($args)) {
// Check for backward compatibility
if (is_string($args)) {
$args = str_replace('?', '', $args);
}
$args = wp_parse_args($args);
$uri = add_query_arg($args, $uri);
}
$scheme = defined('FORCE_SSL_ADMIN') && FORCE_SSL_ADMIN ? 'https' : 'admin';
$ajax_url = admin_url('admin-ajax.php', $scheme);
if (!preg_match('/^https/', $uri) && preg_match('/^https/', $ajax_url) && edd_is_ajax_enabled() || edd_is_ssl_enforced()) {
$uri = preg_replace('/^http:/', 'https:', $uri);
}
if (edd_get_option('no_cache_checkout', false) && edd_is_caching_plugin_active()) {
$uri = add_query_arg('nocache', 'true', $uri);
}
return apply_filters('edd_get_checkout_uri', $uri);
}
