Asked  7 Months ago    Answers:  5   Viewed   34 times

I am creating a custom shipping method for Woocommerce using this tutorial but I am having issues debugging. Whenever shipping methods get updated by user, Woocommerce calls calculate shipping. I have overridden this function with the following.

public function calculate_shipping( $package ) {
    // This is where you'll add your rates
    $rate = array(
      'idea' => $this->id,
      'label' => $this->title,
      'cost' => '90.00',
      'calc_tax' => 'per_item'
    echo "<script>console.log('Calculating shipping');</script>";

In the end I have a fairly complex way of calculating the "cost" but I have no way of debugging it because that echo line produces no output in the chrome console. Any ideas what is going on here?

Any help would be much appreciated. Thank you.



As this is a background process on server side, don't use javascript.

1). WC Logs and the WC_Logger Class in WooCommerce for better debugging

To access the results of the log easily from the dashboard, you can log to a WC logger rather than the error log.

You can access error logs by going to WooCommerce > System Status > Logs.

Then you will be able to choose and "view"the error log file you need, giving you the debugging details that you need. Error logs are also located in the /wc-logs folder within your site install.

Running a stack trace on a caught exception (example):

// Log any exceptions to a WC logger
$log = new WC_Logger();
$log_entry = print_r( $e, true );
$log_entry .= 'Exception Trace: ' . print_r( $e->getTraceAsString(), true );
$log->log( 'new-woocommerce-log-name', $log_entry );


  • WC_Logger methods have been updated since WooCommerce 3: So logging can be grouped by context and severity.

  • Use WC_Logger log() method instead of add() method due to upcoming deprecation (thanks to @Vizz85).

For example:

$logger = wc_get_logger();
$logger->debug( 'debug message', array( 'source' => 'my-extension' ) );


  • Develop WooCommerce blog (january 2017): Improved logging in WooCommerce 3
  • Documentation on the WC_Logger available methods

2). Debugging with WordPress WP_DEBUG Log (as an alternative)

a) First edit your wp-config.php file adding the following lines to enable debug (if these are already defined, edit the values):

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

As errors are logged, they should appear in wp-content/debug.log. You can open this file in a text editor.

b) On your code: Use the following (where $variable is the variable to be displayed in the error log:

error_log( print_r( $variable, true ) );

Now you will get the data for debugging.

Wednesday, March 31, 2021
answered 7 Months ago

As you are finding hard to locate functions.php file you can created a plugin. Create a PHP file as wh-thankyou-tracking.php under /wp-content/plugins/ and copy paste the below code to it and save it. And form admin panel Activate WH Order Tracking JS plugin

 * Plugin Name: WH Order Tracking JS
 * Version: 0.1
 * Description: This plugin will add a JS tracking code to WooCommerce Thankyou page.
 * Author: Raunak Gupta
 * Author URI:
 * Text Domain: wh
if (!defined('ABSPATH'))
} // Exit if accessed directly

if (!class_exists('WooCommerce'))
}// Exit if WooCommerce is not active

function wh_CustomReadOrder($order_id)
    //getting order object
    $order = wc_get_order($order_id);

    $items = $order->get_items();
    $product_js = [];

    foreach ($items as $item_id => $item_data)
        //getting product object
        $_product = wc_get_product($item_data['item_meta']['_product_id'][0]);

        //getting all the product category
        $pro_cat_array = wp_get_post_terms($_product->ID, 'product_cat');

        $sku = $sku = $_product->get_sku();
        $qty = $item_data['item_meta']['_qty'][0];
        $pro_cat = implode(',', $pro_cat_array);
        $pro_brand = $_product->get_attribute('pa_brand'); //replace it with your brand attribute slug
        $pro_price = $item_data['item_meta']['_line_total'][0];

        //storing all the line item as a string form
        $product_js[] = '{id: "' . $sku . '",category:"' . $pro_cat . '",brand:"' . $pro_brand . '",price: "' . $pro_price . '"quantity:"' . $qty . '"}';

    <script type="text/javascript">
        order.purchase = {
            currency: 'EUR',
            transactionId: '<?= $order->id ?>',
            products: [<?= implode(',', $product_js) ?>]

add_action('woocommerce_thankyou', 'wh_CustomReadOrder');

Hope this helps!

Wednesday, March 31, 2021
answered 7 Months ago

When setting up a Server the Host needs to match server host name. For my case I set server host to zrdn: enter image description here

The web server needs to have the server name configured as well. In my case, I configured nginx like so:

server {
        listen   8080;
        server_name zrdn;

Thanks a million, @LazyOne!

Wednesday, March 31, 2021
answered 7 Months ago

There are a bunch of ways to do it, but the most straightforward is to simply use the Python debugger. Just add following line in to a Django view function:

import pdb; pdb.set_trace()


breakpoint()  #from Python3.7

If you try to load that page in your browser, the browser will hang and you get a prompt to carry on debugging on actual executing code.

However there are other options (I am not recommending them):

* return HttpResponse({variable to inspect})

* print {variable to inspect}

* raise Exception({variable to inspect})

But the Python Debugger (pdb) is highly recommended for all types of Python code. If you are already into pdb, you'd also want to have a look at IPDB that uses ipython for debugging.

Some more useful extension to pdb are

pdb++, suggested by Antash.

pudb, suggested by PatDuJour.

Using the Python debugger in Django, suggested by Seafangs.

Saturday, June 5, 2021
answered 5 Months ago

The top left button in the debug window (the green triangle) is doing what you want. "Resume Program (F9)"

Tuesday, August 10, 2021
answered 2 Months ago
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