Filtering PayPal 'Custom' Field Sent By Woocommerce Order

I need to manipulate the data Woocommerce sends to PayPal in the 'Custom' Field. When Woocommerce creates the order and sends the data this can be found in

$order['custom']  

This string is json encoded and I've got a filter I'm trying to use but it doesn't seem to be working. Here's what I've got:

add_filter('woocommerce_paypal_args', 'send_custom_paypal_data');  function send_custom_paypal_data($order) {      error_log(print_r($order['custom'], true)); //log variable      $order['custom'] = wp_json_encode(          array(              'field1' => 'some value',              'field2' => 'more values'          )      );      error_log(print_r($order['custom'], true)); //log value after updating variable      return $order;  }  

The first time I dump the $order['custom'] variable to the error_log I get the expected value from the Woocommerce order. But the 2nd time around, it's the same value, nothing has changed.

https://stackoverflow.com/questions/67030698/filtering-paypal-custom-field-sent-by-woocommerce-order April 10, 2021 at 12:06PM