Title: PHP Warning: Undefined array key “prefixes” Last modified: April 21, 2026 --- # PHP Warning: Undefined array key “prefixes” * Resolved [nexbridge](https://wordpress.org/support/users/nexbridge/) * (@nexbridge) * [1 month ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/) * For the last month or so I’ve been seeing the following messages in the PHP error logs: * [2026-04-15 13:19:32] Undefined array key “prefixes” E_WARNING at /wp-content/ plugins/all-in-one-wp-security-and-firewall/classes/wp-security-utility.php(1301): 0 /wp-content/plugins/all-in-one-wp-security-and-firewall/classes/wp-security- utility.php(1301): {closure}()1 /wp-content/plugins/all-in-one-wp-security-and- firewall/classes/wp-security-cronjob-handler.php(148): AIOWPSecurity_Utility:: get_googlebot_ip_ranges()2 /wp-includes/class-wp-hook.php(341): AIOWPSecurity_Cronjob_Handler- >aios_update_googlebot_ip_ranges()3 /wp-includes/class-wp-hook.php(365): WP_Hook- >apply_filters()4 /wp-includes/plugin.php(522): WP_Hook->do_action()5 /wp-content/ plugins/all-in-one-wp-security-and-firewall/classes/wp-security-cronjob-handler. php(89): do_action()6 /wp-includes/class-wp-hook.php(341): AIOWPSecurity_Cronjob_Handler- >aiowps_daily_cron_event_handler()7 /wp-includes/class-wp-hook.php(365): WP_Hook- >apply_filters()8 /wp-includes/plugin.php(570): WP_Hook->do_action()9 /wp-cron. php(191): do_action_ref_array()10 {main} Viewing 8 replies - 1 through 8 (of 8 total) * Plugin Support [hjogiupdraftplus](https://wordpress.org/support/users/hjogiupdraftplus/) * (@hjogiupdraftplus) * [1 month ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18887633) * Hi [@nexbridge](https://wordpress.org/support/users/nexbridge/), * Thanks for raising this issue. We have already identified it and worked on a fix; it will be included in the next AIOS release. * Regards * Thread Starter [nexbridge](https://wordpress.org/support/users/nexbridge/) * (@nexbridge) * [1 month ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18887635) * OK great – when is the next release scheduled? * Plugin Support [hjogiupdraftplus](https://wordpress.org/support/users/hjogiupdraftplus/) * (@hjogiupdraftplus) * [1 month ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18888150) * Hi [@nexbridge](https://wordpress.org/support/users/nexbridge/), * It should release in next week. * Regards * Thread Starter [nexbridge](https://wordpress.org/support/users/nexbridge/) * (@nexbridge) * [1 month ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18891736) * OK great – just so I know what to look out for, will that be version 5.4.7? * Plugin Support [hjogiupdraftplus](https://wordpress.org/support/users/hjogiupdraftplus/) * (@hjogiupdraftplus) * [1 month ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18892343) * Hi [@nexbridge](https://wordpress.org/support/users/nexbridge/) * Yes, it should be solved in next version AIOS 5.4.7. * Regards * Plugin Support [hjogiupdraftplus](https://wordpress.org/support/users/hjogiupdraftplus/) * (@hjogiupdraftplus) * [4 weeks, 1 day ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18892621) * Hi [@nexbridge](https://wordpress.org/support/users/nexbridge/) * AIOS 5.4.7 has been released that should solve issue related to **Undefined array key “prefixes”** * Regards * Thread Starter [nexbridge](https://wordpress.org/support/users/nexbridge/) * (@nexbridge) * [4 weeks, 1 day ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18892994) * OK great, yes I can see that’s updated – hopefully that will fix it! * Plugin Support [hjogiupdraftplus](https://wordpress.org/support/users/hjogiupdraftplus/) * (@hjogiupdraftplus) * [4 weeks ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18893899) * Hi [@nexbridge](https://wordpress.org/support/users/nexbridge/), * Yes, this should fix the problem. We have updated the Googlebot IP API URL, and checks have also been added for the previous API URL so that this warning is no longer triggered. This should no longer be an issue, as noted in the changelog:“ TWEAK: Updated the Googlebot IP range API URL.” * Regards Viewing 8 replies - 1 through 8 (of 8 total) You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fphp-warning-undefined-array-key-prefixes-2%2F%3Foutput_format%3Dmd&locale=en_US) to reply to this topic. * ![](https://ps.w.org/all-in-one-wp-security-and-firewall/assets/icon-256x256. png?rev=2798307) * [All-In-One Security (AIOS) – Security and Firewall](https://wordpress.org/plugins/all-in-one-wp-security-and-firewall/) * [Frequently Asked Questions](https://wordpress.org/plugins/all-in-one-wp-security-and-firewall/#faq) * [Support Threads](https://wordpress.org/support/plugin/all-in-one-wp-security-and-firewall/) * [Active Topics](https://wordpress.org/support/plugin/all-in-one-wp-security-and-firewall/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/all-in-one-wp-security-and-firewall/unresolved/) * [Reviews](https://wordpress.org/support/plugin/all-in-one-wp-security-and-firewall/reviews/) * 8 replies * 2 participants * Last reply from: [hjogiupdraftplus](https://wordpress.org/support/users/hjogiupdraftplus/) * Last activity: [4 weeks ago](https://wordpress.org/support/topic/php-warning-undefined-array-key-prefixes-2/#post-18893899) * Status: resolved