woocommerce_low_stock │ action-hook │ WC 1.0

Usage

add_action( 'woocommerce_low_stock', 'wp_kama_woocommerce_low_stock_action' );

/**
 * Function for `woocommerce_low_stock` action-hook.
 * 
 * @param  $wc_get_product 
 *
 * @return void
 */
function wp_kama_woocommerce_low_stock_action( $wc_get_product ){

	// action...
}

$wc_get_product

-

Where the hook is called

do_action( 'woocommerce_low_stock', wc_get_product( $change['product']->get_id() ) );

Where the hook is used in WooCommerce