How Can I Effectively Debug Shipping Calculations in WooCommerce 3 ?

Debugging in WooCommerce 3

Debugging can be challenging, especially when dealing with complex background processes like calculating shipping. When overriding the calculate_shipping function, using JavaScript console logs may not yield visible results.

1. Logging with WC Logs

WooCommerce provides a robust logging system with the WC_Logger class. Logs can be accessed from the dashboard (WooCommerce > System Status > Logs) or manually from the /wc-logs folder.

To log detailed information, use the log() method. For example:

$logger = wc_get_logger();
$logger->debug('Calculating shipping', ['source' => 'my-shipping-method']);

2. WP_DEBUG Log (Alternative)

Enabling WP_DEBUG logging allows you to track errors and debug information in the debug.log file. Add the following lines to wp-config.php:

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);

To log data, use error_log():

error_log(print_r($variable, true));

Notes:

• WC_Logger methods have been updated in WooCommerce 3. Use log() instead of add().
• Enable WP_DEBUG logging only for debugging purposes as it can impact performance.

• Related resources:

  • [Improving Logging in WooCommerce 3](https://woocommerce.com/2017/01/10/improved-logging-woocommerce-3/)
  • [WC_Logger Documentation](https://docs.woocommerce.com/wc-apidocs/class-WC_Logger.html)

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