Title: Fatal error with PHP version 8.1 Last modified: November 8, 2022 --- # Fatal error with PHP version 8.1 * Resolved [lavendel2](https://wordpress.org/support/users/lavendel2/) * (@lavendel2) * [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/) * Hi, * When the Super Page Cache for Cloudflare is enabled (together with EDD 3.x); and I purchase a product on the checkout of the Easy Digital Downloads store; a fatal error will be displayed: * `Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, array must have exactly two members in /home/runcloud/ webapps/mainFV/wp-includes/class-wp-hook.php:310 Stack trace: #0 /home/runcloud/ webapps/mainFV/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() # 1 /home/runcloud/webapps/mainFV/wp-includes/plugin.php(517): WP_Hook->do_action()# 2 /home/runcloud/webapps/mainFV/wp-content/plugins/easy-digital-downloads/includes/ orders/functions/orders.php(1196): do_action() #3 /home/runcloud/webapps/mainFV/ wp-content/plugins/easy-digital-downloads/includes/payments/functions.php(141): edd_build_order() #4 /home/runcloud/webapps/mainFV/wp-content/plugins/edd-recurring/ includes/gateways/edd-recurring-gateway.php(640): edd_insert_payment() #5 /home/ runcloud/webapps/mainFV/wp-content/plugins/edd-recurring/includes/gateways/edd- recurring-gateway.php(579): EDD_Recurring_Gateway->record_signup() #6 /home/runcloud/ webapps/mainFV/wp-includes/class-wp-hook.php(308): EDD_Recurring_Gateway->process_checkout()# 7 /home/runcloud/webapps/mainFV/wp-includes/class-wp-hook.php(332): WP_Hook-> apply_filters() #8 /home/runcloud/webapps/mainFV/wp-includes/plugin.php(517): WP_Hook->do_action() #9 /home/runcloud/webapps/mainFV/wp-content/plugins/easy- digital-downloads/includes/gateways/functions.php(404): do_action() #10 /home/ runcloud/webapps/mainFV/wp-content/plugins/easy-digital-downloads/includes/process- purchase.php(193): edd_send_to_gateway() #11 /home/runcloud/webapps/mainFV/wp- includes/class-wp-hook.php(308): edd_process_purchase_form() #12 /home/runcloud/ webapps/mainFV/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters() # 13 /home/runcloud/webapps/mainFV/wp-includes/plugin.php(517): WP_Hook->do_action()# 14 /home/runcloud/webapps/mainFV/wp-content/plugins/easy-digital-downloads/includes/ actions.php(56): do_action() #15 /home/runcloud/webapps/mainFV/wp-includes/class- wp-hook.php(308): edd_post_actions() #16 /home/runcloud/webapps/mainFV/wp-includes/ class-wp-hook.php(332): WP_Hook->apply_filters() #17 /home/runcloud/webapps/mainFV/ wp-includes/plugin.php(517): WP_Hook->do_action() #18 /home/runcloud/webapps/ mainFV/wp-settings.php(617): do_action() #19 /home/runcloud/webapps/mainFV/wp- config.php(86): require_once('...') #20 /home/runcloud/webapps/mainFV/wp-load. php(50): require_once('...') #21 /home/runcloud/webapps/mainFV/wp-blog-header. php(13): require_once('...') #22 /home/runcloud/webapps/mainFV/index.php(17): require('...') #23 {main} thrown in /home/runcloud/webapps/mainFV/wp-includes/ class-wp-hook.php on line 310` * The fatal error will be removed once I disable the WP CF page cache plugin. * Can you please have a look at why this fatal error is popping up when the plugin is enabled? * Thanks in advance. Viewing 5 replies - 1 through 5 (of 5 total) * Plugin Contributor [iSaumya](https://wordpress.org/support/users/isaumya/) * (@isaumya) * [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/#post-16181659) * Hi, just looked at the code of the plugin and don’t see any issues inside the plugin code that may cause this issue. * The settings mentioned here: [https://i.imgur.com/qmm4WCu.jpeg](https://i.imgur.com/qmm4WCu.jpeg) are handled like this: [https://i.imgur.com/ZFo6Qwx.jpeg](https://i.imgur.com/ZFo6Qwx.jpeg) Where it is using `edd_get_option('purchase_page', 0)`, `edd_get_option('success_page', 0)`, `edd_get_option('failure_page', 0)`, `edd_get_option('purchase_history_page', 0)`, `edd_get_option('login_redirect_page', 0)` – to determine which EDD page it is. * Then for this option: [https://i.imgur.com/F6isasM.jpeg](https://i.imgur.com/F6isasM.jpeg) It is using the `edd_insert_payment` hook ([https://docs.easydigitaldownloads.com/article/719-eddinsertpayment](https://docs.easydigitaldownloads.com/article/719-eddinsertpayment)) which according to the doc has 2 arguments – to purge the cache. So, if EDD has made any changes in the new update that they didn’t update in the docs, then I am not aware of it. * But still, can you try [downloading this version of the plugin](https://verti-artifacts.s3.amazonaws.com/WP-Cloudflare-Super-Page-Cache-development-f2adeab5/wp-cloudflare-page-cache.zip) on your site and see if it resolves your issue? * Let me know. * Thread Starter [lavendel2](https://wordpress.org/support/users/lavendel2/) * (@lavendel2) * [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/#post-16181743) * Hello [@isaumya](https://wordpress.org/support/users/isaumya/) — thanks a lot for getting back to me. * I downloaded the new version of your plugin and installed it on the website. I turned on PHP version 8.1 and made a test transaction from our front. Unfortunately, it’s returning the same fatal error as explained above. * I also tried to disable the EDD settings (disabling flush) but that’s also resulting in the same error. * I just downgraded to version 8.0 and that does seem to work with the new version of your plugin. Are there significant features not working on 8.0 compared to 8.1? * Thread Starter [lavendel2](https://wordpress.org/support/users/lavendel2/) * (@lavendel2) * [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/#post-16181791) * BTW, your support is really helpful. * Thumbs up for that! * [adisaputro25](https://wordpress.org/support/users/adisaputro25/) * (@adisaputro25) * [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/#post-16182127) * I’m running this plugin on php8.1 with no issues. * Plugin Contributor [iSaumya](https://wordpress.org/support/users/isaumya/) * (@isaumya) * [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/#post-16182134) * Hi [@lavendel2](https://wordpress.org/support/users/lavendel2/), if you are still having the same issue I’m 100% sure that it is not coming from the plugin. The reason I am saying that is there is just 1 edd hook that this plugin uses as I showed you. I am also using this plugin on many 8.1 sites (thought they are not running EDD) including my own sites without any issues. * Does the problem go away when you disable this plugin? * As I’ve shared above all the ways this plugin talks to EDD, none of them seems to match the error that you have shared. Viewing 5 replies - 1 through 5 (of 5 total) The topic ‘Fatal error with PHP version 8.1’ is closed to new replies. * ![](https://ps.w.org/wp-cloudflare-page-cache/assets/icon-256x256.gif?rev=3234997) * [Super Page Cache – Cloudflare Cache, Page Speed & Core Web Vitals](https://wordpress.org/plugins/wp-cloudflare-page-cache/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-cloudflare-page-cache/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/) * [Active Topics](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-cloudflare-page-cache/reviews/) * 7 replies * 3 participants * Last reply from: [iSaumya](https://wordpress.org/support/users/isaumya/) * Last activity: [3 years, 7 months ago](https://wordpress.org/support/topic/fatal-error-with-php-version-8-1/#post-16182134) * Status: resolved