// Ajax called handled just below
add_action( 'wp_ajax_ninja_forms_sendwp_remote_install', 'wp_ajax_ninja_forms_sendwp_remote_install_handler' );
function wp_ajax_ninja_forms_sendwp_remote_install_handler () {
$all_plugins = get_plugins();
$is_sendwp_installed = false;
foreach(get_plugins() as $path => $details ) {
if(false === strpos($path, '/sendwp.php')) continue;
$is_sendwp_installed = true;
activate_plugin( $path );
if( ! $is_sendwp_installed ) {
include_once ABSPATH . 'wp-admin/includes/plugin-install.php';
include_once ABSPATH . 'wp-admin/includes/file.php';
include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
* Use the WordPress Plugins API to get the plugin download link.
$api = plugins_api( 'plugin_information', array(
if ( is_wp_error( $api ) ) {
echo json_encode( array( 'error' => $api->get_error_message(), 'debug' => $api ) );
* Use the AJAX Upgrader skin to quietly install the plugin.
$upgrader = new Plugin_Upgrader( new WP_Ajax_Upgrader_Skin() );
$install = $upgrader->install( $api->download_link );
if ( is_wp_error( $install ) ) {
echo json_encode( array( 'error' => $install->get_error_message(), 'debug' => $api ) );
* Activate the plugin based on the results of the upgrader.
* @NOTE Assume this works, if the download works - otherwise there is a false positive if the plugin is already installed.
$activated = activate_plugin( $upgrader->plugin_info() );
* Final check to see if SendWP is available.
if( ! function_exists('sendwp_get_server_url') ) {
'error' => esc_html__( 'Something went wrong. SendWP was not installed correctly.' ),
'register_url' => esc_url(sendwp_get_server_url() . '_/signup'),
'client_name' => esc_attr( sendwp_get_client_name() ),
'client_secret' => esc_attr( sendwp_get_client_secret() ),
'client_redirect' => esc_url(sendwp_get_client_redirect()),