Title: invalid comparison function
Last modified: August 22, 2016

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# invalid comparison function

 *  Resolved [WooUser](https://wordpress.org/support/users/ddjg/)
 * (@ddjg)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/invalid-comparison-function/)
 * hi, just installed on one client’s site, got many errors like this on the export
   page.
 * what should i do?
 * Warning: usort() [function.usort]: Invalid comparison function in /home/content/
   m/i/x/WEBSITE/html/wp/wp-content/plugins/woocommerce-exporter/includes/products.
   php on line 997
 * Warning: usort() [function.usort]: Invalid comparison function in /home/content/
   m/i/x/WEBSITE/html/wp/wp-content/plugins/woocommerce-exporter/includes/categories.
   php on line 108
 * Warning: usort() [function.usort]: Invalid comparison function in /home/content/
   m/i/x/WEBSITE/html/wp/wp-content/plugins/woocommerce-exporter/includes/tags.php
   on line 115
 * [https://wordpress.org/plugins/woocommerce-exporter/](https://wordpress.org/plugins/woocommerce-exporter/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  [Michael Visser](https://wordpress.org/support/users/visser/)
 * (@visser)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/invalid-comparison-function/#post-5574857)
 * Hi ddjg, I seem to remember this was a PHP version issue, we applied a workaround
   in Store Exporter Deluxe, I’ll apply the same to the basic Store Exporter in 
   the next Plugin update 🙂
 *  Thread Starter [WooUser](https://wordpress.org/support/users/ddjg/)
 * (@ddjg)
 * [11 years, 5 months ago](https://wordpress.org/support/topic/invalid-comparison-function/#post-5574887)
 * Great thanks! Would love to be able to export some products from one of my sites
   and import to another, the plugin works great on my other installs.
 *  Thread Starter [WooUser](https://wordpress.org/support/users/ddjg/)
 * (@ddjg)
 * [11 years, 4 months ago](https://wordpress.org/support/topic/invalid-comparison-function/#post-5574907)
 * HI, do you know when this might be coming?
 * Thanks again!

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘invalid comparison function’ is closed to new replies.

 * ![](https://ps.w.org/woocommerce-exporter/assets/icon-256x256.png?rev=986329)
 * [Store Exporter – Export WooCommerce Products, Orders, Subscriptions, Customers](https://wordpress.org/plugins/woocommerce-exporter/)
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 * 3 replies
 * 2 participants
 * Last reply from: [WooUser](https://wordpress.org/support/users/ddjg/)
 * Last activity: [11 years, 4 months ago](https://wordpress.org/support/topic/invalid-comparison-function/#post-5574907)
 * Status: resolved