Title: Undefined array key 3807 Last modified: November 4, 2022 --- # Undefined array key 3807 * [cantraig](https://wordpress.org/support/users/cantraig/) * (@cantraig) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/) * Good morning, yesterday I was alerted by jetpack that my site went down briefly for around 20 minutes. When it was back every page of the website is listed with the same error repeated multiple times * Warning: Undefined array key 3807 in /homepages/24/d4296231672/htdocs/wordpress/ wp-includes/nav-menu-template.php on line 210 * I completed some updates, tried disabling plugins and then re installed 6.1. * I then removed all but the very basic plugins and I’m still not anywhere near a fix. * ``` ### wp-core ### version: 6.1 site_language: en_GB user_language: en_GB timezone: UTC permalink: /%postname%/ https_status: true multisite: false user_registration: 1 blog_public: 1 default_comment_status: open environment_type: production user_count: 41 dotorg_communication: true ### wp-paths-sizes ### wordpress_path: /homepages/24/d4296231672/htdocs/wordpress wordpress_size: loading... uploads_path: /homepages/24/d4296231672/htdocs/wordpress/wp-content/uploads uploads_size: loading... themes_path: /homepages/24/d4296231672/htdocs/wordpress/wp-content/themes themes_size: loading... plugins_path: /homepages/24/d4296231672/htdocs/wordpress/wp-content/plugins plugins_size: loading... database_size: loading... total_size: loading... ### wp-dropins (1) ### advanced-cache.php: true ### wp-active-theme ### name: Storefront (storefront) version: 4.1.3 author: Automattic author_website: https://woocommerce.com/ parent_theme: none theme_features: core-block-patterns, widgets-block-editor, post-thumbnails, automatic-feed-links, custom-logo, menus, html5, custom-background, custom-header, site-logo, title-tag, customize-selective-refresh-widgets, wp-block-styles, align-wide, editor-styles, editor-font-sizes, editor-style, responsive-embeds, amp, woocommerce, wc-product-gallery-zoom, wc-product-gallery-lightbox, wc-product-gallery-slider, starter-content, widgets, infinite-scroll theme_path: /homepages/24/d4296231672/htdocs/wordpress/wp-content/themes/storefront auto_update: Enabled ### wp-themes-inactive (3) ### Twenty Twenty: version: 2.1, author: the WordPress team, Auto-updates enabled Twenty Twenty-One: version: 1.7, author: the WordPress team, Auto-updates enabled Twenty Twenty-Two: version: 1.3, author: the WordPress team, Auto-updates enabled ### wp-plugins-active (18) ### Advanced Dynamic Pricing for WooCommerce: version: 4.1.6, author: AlgolPlus, Auto-updates enabled Back In Stock Notifier for WooCommerce | WooCommerce Waitlist Pro: version: 3.0, author: codewoogeek, Auto-updates enabled CookieYes | GDPR Cookie Consent: version: 3.0.4, author: CookieYes, Auto-updates enabled Fasthosts Assistant: version: 8.4.0, author: Fasthosts, Auto-updates enabled Google Listings and Ads: version: 2.2.0, author: WooCommerce, Auto-updates enabled Jetpack: version: 11.5.1, author: Automattic, Auto-updates enabled MailPoet: version: 3.102.1, author: MailPoet, Auto-updates enabled MailPoet Premium: version: 3.102.0, author: MailPoet, Auto-updates enabled myStickymenu: version: 2.6.1, author: Premio, Auto-updates enabled One Time Login: version: 0.3.1, author: Daniel Bachhuber, Auto-updates enabled StoreCustomizer: version: 2.4.4, author: Kaira, Auto-updates enabled Website Open/Closed Toggle: version: 0.3.8, author: RS, Auto-updates enabled Wish List for WooCommerce: version: 1.8.9, author: Thanks to IT, Auto-updates enabled WooCommerce: version: 7.0.1, author: Automattic, Auto-updates enabled WooCommerce Blocks: version: 8.8.2, author: Automattic, Auto-updates enabled WooCommerce PayPal Payments: version: 1.9.5, author: WooCommerce, Auto-updates enabled WooCommerce Weight Based Shipping: version: 5.3.25, author: weightbasedshipping.com, Auto-updates enabled WP Super Cache: version: 1.9.1, author: Automattic, Auto-updates enabled ### wp-plugins-inactive (4) ### Clearpay Gateway for WooCommerce: version: 3.5.0, author: Clearpay, Auto-updates enabled Facebook for WooCommerce: version: 2.6.28, author: Facebook, Auto-updates enabled Product Import Export for WooCommerce: version: 2.2.5, author: WebToffee, Auto-updates enabled Visual Term Description Editor: version: 1.8.1, author: Shea Bunge, Auto-updates enabled ### wp-media ### image_editor: WP_Image_Editor_GD imagick_module_version: Not available imagemagick_version: Not available imagick_version: Not available file_uploads: File uploads is turned off post_max_size: 64M upload_max_filesize: 64M max_effective_size: 64 MB max_file_uploads: 20 gd_version: 2.2.5 gd_formats: GIF, JPEG, PNG, WebP, BMP, XPM ghostscript_version: 9.27 ### wp-server ### server_architecture: Linux 4.4.302-icpu-088 x86_64 httpd_software: Apache php_version: 8.0.25 64bit php_sapi: cgi-fcgi max_input_variables: 5000 time_limit: 50000 memory_limit: -1 max_input_time: -1 upload_max_filesize: 64M php_post_max_size: 64M curl_version: 7.64.0 OpenSSL/1.1.1n suhosin: false imagick_availability: false pretty_permalinks: true htaccess_extra_rules: true ### wp-database ### extension: mysqli server_version: 10.5.17-MariaDB-1:10.5.17+maria~deb10-log client_version: mysqlnd 8.0.25 max_allowed_packet: 67108864 max_connections: 3000 ### wp-constants ### WP_HOME: undefined WP_SITEURL: undefined WP_CONTENT_DIR: /homepages/24/d4296231672/htdocs/wordpress/wp-content WP_PLUGIN_DIR: /homepages/24/d4296231672/htdocs/wordpress/wp-content/plugins WP_MEMORY_LIMIT: 40M WP_MAX_MEMORY_LIMIT: -1 WP_DEBUG: false WP_DEBUG_DISPLAY: true WP_DEBUG_LOG: false SCRIPT_DEBUG: false WP_CACHE: true CONCATENATE_SCRIPTS: undefined COMPRESS_SCRIPTS: undefined COMPRESS_CSS: undefined WP_ENVIRONMENT_TYPE: Undefined DB_CHARSET: utf8 DB_COLLATE: undefined ### wp-filesystem ### wordpress: writable wp-content: writable uploads: writable plugins: writable themes: writable ### jetpack ### site_id: 202517603 ssl_cert: No time_diff: undefined version_option: 11.5.1:1667484187 old_version: 11.5:1667398080 public: Public master_user: #1 cantraig_candles current_user: #1 cantraig_candles tokens_set: Blog User blog_token: T4pLRewHUmSVdFYRzdgTLz5C%F!MW*q8 user_token: qG3K!YdJ(eg@MkDC)XTQBs9&1@xd1d($ version: 11.5.1 jp_plugin_dir: /homepages/24/d4296231672/htdocs/wordpress/wp-content/plugins/jetpack/ plan: free protect_header: {"trusted_header":"REMOTE_ADDR","segments":1,"reverse":false} full_sync: {"started":"Sat, 05 Feb 2022 14:12:51 +0000","finished":"Sat, 05 Feb 2022 14:12:55 +0000","progress":{"options":{"finished":true},"functions":{"finished":true},"constants":{"finished":true},"users":{"total":"1","sent":1,"finished":true,"last_sent":"1"},"network_options":{"finished":true}},"config":{"options":true,"functions":true,"constants":true,"users":[1],"network_options":true}} sync_size: undefined sync_lag: 0 seconds full_sync_size: undefined full_sync_lag: 0 seconds idc_urls: {"home":"https:\/\/mayburys.uk","siteurl":"https:\/\/mayburys.uk","WP_HOME":"","WP_SITEURL":""} idc_error_option: false idc_optin: true cxn_tests: All Pass. ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fundefined-array-key-3807%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 11 replies - 1 through 11 (of 11 total) * Moderator [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16166677) * Try [downloading WordPress](https://wordpress.org/download/) again, access your server via [SFTP or FTP](https://wordpress.org/support/article/ftp-clients/), or a file manager in your hosting account’s control panel (consult your hosting provider’s documentation for specifics on these), and delete then replace your copies of everything on the server **except** the wp-config.php file and the / wp-content/ directory with fresh copies from the download. This will effectively replace all of your core files without damaging your content and settings. * If you’d like to manually make a backup of your site first, please follow the steps at [https://wordpress.org/support/article/wordpress-backups/](https://wordpress.org/support/article/wordpress-backups/) * Some uploaders tend to be unreliable when overwriting files, so don’t forget to delete the original files before replacing them. * If that doesn’t work, try [manually resetting your plugins](https://wordpress.org/support/article/faq-troubleshooting/#how-to-deactivate-all-plugins-when-not-able-to-access-the-administrative-menus)( no Dashboard access required). If that resolves the issue, reactivate each one individually until you find the cause. * And if that does not resolve the issue, access your server via [SFTP or FTP](https://wordpress.org/support/article/ftp-clients/), or a file manager in your hosting account’s control panel (consult your hosting provider’s documentation for specifics on these), navigate to /wp-content/themes/ and rename the directory of your currently active theme. Hopefully, this will force the default theme to activate and rule out a theme-specific issue (theme functions can interfere like plugins).` * [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/) * (@antonvlasenko) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16166826) * Hello, [@cantraig](https://wordpress.org/support/users/cantraig/). I think that’s a bug. It was introduced about 3 weeks ago. In my opinion, it has nothing to do with FTP/SFTP. I will alert the developers so they can work on a proper fix. Meanwhile, you can edit the `src/wp-includes/nav-menu-template.php` file and replace this line (line #212): * ``` $menu_item_parent = $menu_items_tree[ $menu_item_key ]; ``` * with * ``` $menu_item_parent = isset( $menu_items_tree[ $menu_item_key ] ) ? $menu_items_tree[ $menu_item_key ] : 0; ``` * But please do this at your own risk (and make backups). Editing core files is a bad idea, and I’m only providing this code snippet out of a desire to help until a proper fix gets released. I haven’t tested it and I don’t know if it will work. - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). * Moderator [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16167073) * Please don’t edit the core files. * This doesn’t match any bugs we’re currently aware of: [https://wordpress.org/support/topic/read-this-first-wordpress-6-1/#post-15661769](https://wordpress.org/support/topic/read-this-first-wordpress-6-1/#post-15661769) * And that file in particular also handles theme and plugin functions, suggesting there’s a conflict caused by one of them. * If you have ruled out third-party conflicts and are absolutely certain this is a bug, please report it properly by following the steps at [https://make.wordpress.org/core/handbook/testing/reporting-bugs/](https://make.wordpress.org/core/handbook/testing/reporting-bugs/) so it can be addressed by the developers. * [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/) * (@antonvlasenko) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16167173) * Hello, [@macmanx](https://wordpress.org/support/users/macmanx/). Thanks for your reply. I’ve already reported it in the original issue where the “bug” was created: [https://core.trac.wordpress.org/ticket/28620#comment:34](https://core.trac.wordpress.org/ticket/28620#comment:34) I’m inclined to let core committers decide what to do with it. Even if it’s a plugin conflict, it must not cause PHP warnings in Core files. From my point of view, it’s more about following the rules of “defensive programming” rather than plugin conflicts. - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). * Moderator [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16167183) * We could probably handle overall errors better, I agree, but in this case, the right thing to do is for the developer of the conflicting plugin/theme to fix their plugin/theme. * That fix would then go out to all of the plugin’s/theme’s users as soon as they update (or automatically as we introduced auto-updates for plugins/themes a while back), rather than waiting for a lengthy contributor discussion and inevitable core code refactor. * [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/) * (@antonvlasenko) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16167238) * > the right thing to do is for the developer of the conflicting plugin/theme > to fix their plugin/theme. * It is not known what the cause of this issue is. Unfortunately, there are no steps to reproduce the issue. The only thing that is clear to me is that the PHP warning is related to the patch I mentioned above. It wouldn’t have appeared without the patch. From my point of view, the code of the patch must be improved to fix the PHP warning and/or handle it properly. - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). - This reply was modified 3 years, 7 months ago by [Anton Vlasenko](https://wordpress.org/support/users/antonvlasenko/). * [Brian Alexander](https://wordpress.org/support/users/ironprogrammer/) * (@ironprogrammer) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16167277) * [@cantraig](https://wordpress.org/support/users/cantraig/), here is a suggestion that does _not_ resolve the warning, however it will hide these from visitors to your site while a solution is eventually discovered. * **Temporary Warning Suppression** * According to the config data you’ve provided, it appears you have `WP_DEBUG_DISPLAY` enabled. I would recommend turning this off, and also disabling PHP’s internal` display_errors` setting. In your `wp-config.php` file, here is what to add/modify: * ` define( 'WP_DEBUG_DISPLAY', false ); // tell WordPress to hide errors ini_set(' display_errors', 0 ); // tell PHP to hide errors * Now I WOULD recommend you leave debug logging enabled (`WP_DEBUG_LOG`) when troubleshooting, so that you know what’s going on behind the scenes. Ignorance is bliss, but only for a short while 😂. * For more information on debug settings in WordPress, please see this article: * > [Debugging in WordPress](https://wordpress.org/support/article/debugging-in-wordpress/) * — * **Remediation** * If at all possible, you should copy your production environment into a staging/ dev area, and from there disable ALL plugins to see if this warning still shows up. This will go a long way toward giving you peace of mind and knowing the underlying cause. * If I’m reading the config info correctly, you have 18 enabled plugins (not including your theme) that are potentially modifying the menu data and triggering the warning messages. * — * Whether or not you identify that one of the plugins is causing the issue, please report your findings here. Because WordPress 6.1 was just released, this info will either help other users of the plugin, or it could help the entire WordPress community 🙌🏻 * Thread Starter [cantraig](https://wordpress.org/support/users/cantraig/) * (@cantraig) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16174181) * [@macmanx](https://wordpress.org/support/users/macmanx/) thanks for this info. I will look into doing what you suggested when I have time to solve anything that may go wrong in the process. In the meantime I need to hide the error messages from my website. Since this is being displayed I’m loosing a lot of potential sales. * I have looked around and saw that I can set WP_DEBUG_DISPLAY to false and expect PHP messages to *never* display on-screen to visitors? * Is there any risk in doing this? I only feel comfortable adding to css I’ve never gone much further than this before. * [Brian Alexander](https://wordpress.org/support/users/ironprogrammer/) * (@ironprogrammer) * [3 years, 7 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16179384) * Hi, [@cantraig](https://wordpress.org/support/users/cantraig/): * In addition to setting `WP_DEBUG_DISPLAY` to false, the reason for the `ini_set` part is that your host may have configured PHP itself to display errors, even if WordPress isn’t. So the intent for these configuration settings in tandem is to prevent any PHP errors appearing on the frontend of the site. * As with any changes to your site, it is recommended to [make a backup first](https://wordpress.org/support/article/wordpress-backups/), but an adjustment to `wp-config.php` like this is fairly common. * [Brian Alexander](https://wordpress.org/support/users/ironprogrammer/) * (@ironprogrammer) * [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16216919) * Hi, [@cantraig](https://wordpress.org/support/users/cantraig/): * Just following up here — were you able to resolve the errors displaying on the site? * Thread Starter [cantraig](https://wordpress.org/support/users/cantraig/) * (@cantraig) * [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16216925) * [@ironprogrammer](https://wordpress.org/support/users/ironprogrammer/) i was not able to get it fixed however when updating to 6.1.1 it fixed the error for me. Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘Undefined array key 3807’ is closed to new replies. * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/) * 11 replies * 4 participants * Last reply from: [cantraig](https://wordpress.org/support/users/cantraig/) * Last activity: [3 years, 6 months ago](https://wordpress.org/support/topic/undefined-array-key-3807/#post-16216925) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics