Title: Fatal Error: Cannot use object of type WP_Post as array Last modified: January 12, 2023 --- # Fatal Error: Cannot use object of type WP_Post as array * Resolved [gishua](https://wordpress.org/support/users/gishua/) * (@gishua) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/) * We are still using php 7.3 and this could be the cause, but here are the error messages when trying to upload a featured image within a post. Note: If I upload in the Media Library it works fine. * [12-Jan-2023 15:25:27 America/New_York] PHP Fatal error: Uncaught Error: Cannot use object of type WP_Post as array in /var/www/example.com/webroot/wp-content/ plugins/w3-total-cache/Util_AttachToActions.php:76 Stack trace: * **0 /var/www/example.com/webroot/wp-includes/class-wp-hook.php(308): W3TC\Util_AttachToActions- >on_pre_post_update(11653, Object(WP_Post))** * **1 /var/www/example.com/webroot/wp-includes/class-wp-hook.php(332): WP_Hook- >apply_filters(”, Array)** * **2 /var/www/example.com/webroot/wp-includes/plugin.php(517): WP_Hook->do_action( Array)** * **3 /var/www/example.com/webroot/wp-includes/post.php(4433): do_action(‘pre_post_update’, 11654, Array)** * **4 /var/www/example.com/webroot/wp-includes/post.php(6346): wp_insert_post(Array, false, true)** * **5 /var/www/example.com/webroot/wp-includes/post.php(4802): wp_insert_attachment( Array, false, 0, false)** * **6 /var/www/example.com/webroot/wp-content/plugins/auto-image-attributes-from- filename-with-bulk-updater/admin/iaff_image-attributes-from-filename-do.php(720): wp_update_post(Array)** * **7 /va in /var/www/example.com/webroot/wp-content/plugins/w3-total-cache/Util_AttachToActions. php on line 76** Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Author [Arun Basil Lal](https://wordpress.org/support/users/arunbasillal/) * (@arunbasillal) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16384162) * Hello [@gishua](https://wordpress.org/support/users/gishua/) * My name is Arun. Sorry for the late reply, I was under the weather for a bit. Happy new year. * I tried to replicate the error by installing W3 Total Cache and by uploading an image as a featured image on a post. Couldn’t replicate it. My PHP version was 7.3.5. * Can you please disable the `Auto Image Attributes` plugin and try again please? This will help me confirm that the error is coming from my plugin. Currently it looks like it is coming from W3 Total Cache, but I could be wrong. * Looking forward to your feedback. * Plugin Author [Arun Basil Lal](https://wordpress.org/support/users/arunbasillal/) * (@arunbasillal) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16416482) * Any update [@gishua](https://wordpress.org/support/users/gishua/)? Are you still able to replicate this? * Thread Starter [gishua](https://wordpress.org/support/users/gishua/) * (@gishua) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16422466) * Hi [@arunbasillal](https://wordpress.org/support/users/arunbasillal/), thank you for your response. I have updated all plugins & tried uploading to our custom post types & to regular posts and it worked now. Whatever you did to adjust the plugin seems like it worked. * I will try it on the live site and let you know the results as well. * Thank you * Josh * Plugin Author [Arun Basil Lal](https://wordpress.org/support/users/arunbasillal/) * (@arunbasillal) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16422516) * Thanks for the update Josh 🙂 * Thread Starter [gishua](https://wordpress.org/support/users/gishua/) * (@gishua) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16422639) * [@arunbasillal](https://wordpress.org/support/users/arunbasillal/) looks like it works on live as well! Thank you! * Plugin Author [Arun Basil Lal](https://wordpress.org/support/users/arunbasillal/) * (@arunbasillal) * [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16422762) * Perfect 🙂 Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Fatal Error: Cannot use object of type WP_Post as array’ is closed to new replies. * ![](https://ps.w.org/auto-image-attributes-from-filename-with-bulk-updater/assets/ icon-128x128.png?rev=1690261) * [Auto Image Attributes From Filename With Bulk Updater (Add Alt Text, Image Title For Image SEO)](https://wordpress.org/plugins/auto-image-attributes-from-filename-with-bulk-updater/) * [Frequently Asked Questions](https://wordpress.org/plugins/auto-image-attributes-from-filename-with-bulk-updater/#faq) * [Support Threads](https://wordpress.org/support/plugin/auto-image-attributes-from-filename-with-bulk-updater/) * [Active Topics](https://wordpress.org/support/plugin/auto-image-attributes-from-filename-with-bulk-updater/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/auto-image-attributes-from-filename-with-bulk-updater/unresolved/) * [Reviews](https://wordpress.org/support/plugin/auto-image-attributes-from-filename-with-bulk-updater/reviews/) ## Tags * [array](https://wordpress.org/support/topic-tag/array/) * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 6 replies * 2 participants * Last reply from: [Arun Basil Lal](https://wordpress.org/support/users/arunbasillal/) * Last activity: [3 years, 3 months ago](https://wordpress.org/support/topic/fatal-error-cannot-use-object-of-type-wp_post-as-array/#post-16422762) * Status: resolved