Title: PHP 8
Last modified: February 10, 2022

---

# PHP 8

 *  Resolved [ahawtin](https://wordpress.org/support/users/ahawtin/)
 * (@ahawtin)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/php-8-45/)
 * Hi guys,
 * great plug-in, thank you. We were starting a slow roll-out of php 8 on our French
   site when we ran into a problem adding tracking numbers to our orders. We rolled
   back to php 7.4 and all is good now. Here is the error:
 *     ```
       2022-02-10T12:47:53+00:00 CRITICAL Uncaught TypeError: date_format(): Argument #1 ($object) must be of type DateTimeInterface, bool given in /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-content/plugins/woo-advanced-shipment-tracking/includes/class-wc-advanced-shipment-tracking.php:1155
       Stack trace:
       #0 /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-content/plugins/woo-advanced-shipment-tracking/includes/class-wc-advanced-shipment-tracking.php(1155): date_format()
       #1 /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-content/plugins/woo-advanced-shipment-tracking/includes/class-wc-advanced-shipment-tracking.php(662): WC_Advanced_Shipment_Tracking_Actions->add_tracking_item()
       #2 /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-includes/class-wp-hook.php(307): WC_Advanced_Shipment_Tracking_Actions->save_meta_box_ajax()
       #3 /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
       #4 /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-includes/plugin.php(474): WP_Hook->do_action()
       #5 /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-admin/admin-ajax.php(187): do_action()
       #6 {main}
         thrown dans /home/basicsby/domains/basicsbymail.com/public_html/francais/wp-content/plugins/woo-advanced-shipment-tracking/includes/class-wc-advanced-shipment-tracking.php à la ligne 1155
       ```
   
 * Please let me know if there is any more information you would like to provide.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-8-45%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Contributor [Ewout](https://wordpress.org/support/users/pomegranate/)
 * (@pomegranate)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/php-8-45/#post-15352125)
 * Wrong forum, the forum for **Advanced Shipment Tracking for WooCommerce** can
   be found here: [https://wordpress.org/support/plugin/woo-advanced-shipment-tracking/](https://wordpress.org/support/plugin/woo-advanced-shipment-tracking/)

Viewing 1 replies (of 1 total)

The topic ‘PHP 8’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-pdf-invoices-packing-slips/assets/icon-256x256.
   png?rev=2189942)
 * [PDF Invoices & Packing Slips for WooCommerce](https://wordpress.org/plugins/woocommerce-pdf-invoices-packing-slips/)
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## Tags

 * [php 8](https://wordpress.org/support/topic-tag/php-8/)

 * 1 reply
 * 2 participants
 * Last reply from: [Ewout](https://wordpress.org/support/users/pomegranate/)
 * Last activity: [4 years, 3 months ago](https://wordpress.org/support/topic/php-8-45/#post-15352125)
 * Status: resolved