woocommerce_out_of_stock_message │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_out_of_stock_message', 'wp_kama_woocommerce_out_of_stock_message_filter' );

/**
 * Function for `woocommerce_out_of_stock_message` filter-hook.
 * 
 * @param  $__ 
 *
 * @return 
 */
function wp_kama_woocommerce_out_of_stock_message_filter( $__ ){

	// filter...
	return $__;
}

$__

-

Where the hook is called

<p class="stock out-of-stock"><?php echo esc_html( apply_filters( 'woocommerce_out_of_stock_message', __( 'This product is currently out of stock and unavailable.', 'woocommerce' ) ) ); ?></p>

Where the hook is used in WooCommerce