woocommerce-ajax-add-to-cart-variable-products.php

function woocommerce_add_to_cart_variable_rc_callback() {
		
		ob_start();
		
		$product_id = apply_filters( 'woocommerce_add_to_cart_product_id', absint( $_POST['product_id'] ) );
		$quantity = empty( $_POST['quantity'] ) ? 1 : apply_filters( 'woocommerce_stock_amount', $_POST['quantity'] );
		$variation_id = $_POST['variation_id'];
		$variation  = $_POST['variation'];
		$passed_validation = apply_filters( 'woocommerce_add_to_cart_validation', true, $product_id, $quantity );
	
		if ( $passed_validation && WC()->cart->add_to_cart( $product_id, $quantity, $variation_id, $variation  ) ) {
			do_action( 'woocommerce_ajax_added_to_cart', $product_id );
			if ( get_option( 'woocommerce_cart_redirect_after_add' ) == 'yes' ) {
				wc_add_to_cart_message( $product_id );
			}
	
			// Return fragments
			WC_AJAX::get_refreshed_fragments();
		} else {
			$this->json_headers();
	
			// If there was an error adding to the cart, redirect to the product page to show any errors
			$data = array(
				'error' => true,
				'product_url' => apply_filters( 'woocommerce_cart_redirect_after_error', get_permalink( $product_id ), $product_id )
				);
			echo json_encode( $data );
		}
		die();
	}