TGMPA / TGM-Plugin-Activation

				$plugins_to_install = array();

				// Did user actually select any plugins to install/update ?

				if ( empty( $_POST['plugin'] ) ) {

					if ( 'install' === $install_type ) {

						$message = __( 'No plugins were selected to be installed. No action taken.', 'tgmpa' );

					} else {

						$message = __( 'No plugins were selected to be updated. No action taken.', 'tgmpa' );

					}

					echo '<div id="message" class="error"><p>', esc_html( $message ), '</p></div>';

					return false;

				}

				if ( is_array( $_POST['plugin'] ) ) {

					$plugins_to_install = (array) $_POST['plugin'];

				}

				// No need to proceed further if we have no plugins to handle.

				if ( empty( $plugins_to_install ) ) {

					if ( 'install' === $install_type ) {

						$message = __( 'No plugins are available to be installed at this time.', 'tgmpa' );

					} else {

						$message = __( 'No plugins are available to be updated at this time.', 'tgmpa' );

					}

					echo '<div id="message" class="error"><p>', esc_html( $message ), '</p></div>';

					return false;

				}

				// Pass all necessary information if WP_Filesystem is needed.

				$url = wp_nonce_url(