Title: Undefined array key “post_type” on Orders Page
Last modified: November 13, 2025

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# Undefined array key “post_type” on Orders Page

 *  Resolved [avonrivercs](https://wordpress.org/support/users/avonrivercs/)
 * (@avonrivercs)
 * [7 months ago](https://wordpress.org/support/topic/undefined-array-key-post_type-on-orders-page/)
 * The owner of this website has been complaining of slow operations in the backend.
   I have done a few things to speed up the site including installing Memcached 
   and adding an object cache amongst other things. I installed Query Monitor plugin
   and apart from deprecated warnings, there doesn’t seem to be any problems until
   I go to view the Woocommerce > Orders. This error warning then shows in red in
   Query Monitor:
 * WarningUndefined array key “post_type”+
    1. wp-content/plugins/woocommerce/includes/admin/list-tables/class-wc-admin-list-
       table-orders.php:711
 * 1Plugin: woocommerce
 * CoPilot suggests the following fixes:
 * $post_type = isset($_REQUEST[‘post_type’]) ? $_REQUEST[‘post_type’] : ”;
 * Or, using null coalescing (php7+)
 * $post_type = $_REQUEST[‘post_type’] ?? ”;
 * I understand that any fix would only be effective until the next update, so this
   would not be a permanent fix. Has anyone else found this issue and has a long
   term workaround?
 * P.S. We are using php 8.2
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fundefined-array-key-post_type-on-orders-page%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 1 replies (of 1 total)

 *  Plugin Support [shahzeen(woo-hc)](https://wordpress.org/support/users/shahzeenfarooq/)
 * (@shahzeenfarooq)
 * [7 months ago](https://wordpress.org/support/topic/undefined-array-key-post_type-on-orders-page/#post-18717529)
 * Hi there!
 * Thanks for the detailed information and for sharing your findings.
 * The warning you’re seeing `Undefined array key "post_type"`typically appears 
   when a plugin or a custom code snippet triggers the **WooCommerce Orders page**
   without passing the expected `post_type` value.
 * Since this is a PHP 8.2-related notice, it usually doesn’t affect functionality
   but can appear due to stricter error handling in PHP 8+.
 * To confirm, could you please:
    1. Temporarily switch to a default theme like **Storefront** and deactivate all
       plugins except **WooCommerce**, then check if the warning still appears.
    2. If the warning disappears, reactivate your other plugins one by one to identify
       which one triggers it.
 * If the issue only occurs with WooCommerce active and no other plugins/themes.
   I’m suggesting this because I’m not able to replicate the issue on my end.
 * I’d like to understand your site properly. Please share with us the necessary
   information below for us to investigate the issue further:
    - **System Status Report** which you can find via WooCommerce > Status
    - **Fatal error logs** (if any) under WooCommerce > Status > Logs.
 * Please use [https://pastebin.com/](https://pastebin.com/) or [https://gist.github.com/](https://gist.github.com/)
   and share a link to that paste in reply here. Once we have more information, 
   we’ll be able to assist you further.

Viewing 1 replies (of 1 total)

The topic ‘Undefined array key “post_type” on Orders Page’ is closed to new replies.

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 * 1 reply
 * 2 participants
 * Last reply from: [shahzeen(woo-hc)](https://wordpress.org/support/users/shahzeenfarooq/)
 * Last activity: [7 months ago](https://wordpress.org/support/topic/undefined-array-key-post_type-on-orders-page/#post-18717529)
 * Status: resolved