wpsnoop Fatal error: Cannot redeclare redux_customizer_custom_validation()

If you are dealing with a WordPress issue where a PHP Function redux_customizer_custom_validation() was already declared it is most likely due to a plugin/theme conflict.

wpsnoop scanned and analyzed over 100,000 WordPress plugins and themes to find and locate potential conflicts including functions that share the same name.

This page has information on the 64 places where that function is declared and used in WordPress plugins and themes.

Note: Our database currently only taps into the free themes and plugins available in the publicly available WordPress plugins and themes, if your site uses paid plugins, themes or custom code there may be additional conflicts.

Our database has uncovered 64 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/ultimate-amp/inc/admin/redux-core/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Ultimate AMP and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/btn-admin-login-customizer-pro/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin BTN Admin login Customizer pro and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/wp-quickdraw/framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin WP QuickDraw and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/compare-your-income-moneyarcher/optionpanel/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Compare Your Income - MoneyArcher and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/woo-mstoreapp-mobile-app/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Mstoreapp Mobile and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/awesome-social-icons/framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Awesome Social Icons and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/custom-wp-admin-login/admin/lib/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Custom WP Admin Login and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/viral-coming-soon/admin/ReduxCore/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Viral Coming Soon Page by Growtheme and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/cv-card/admin/redux-framework/ReduxCore/extensions/customizer/extension_customizer.php:648)

This file is part of the WordPress theme CV Card and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/deep-free-plus/admin/theme-options/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Deep Free Plus and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/wp-mail-logging/lib/vendor/redux-framework/redux-core/inc/extensions/customizer/class-redux-extension-customizer.php:814)

This file is part of the WordPress plugin WP Mail Logging and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/dima-take-action/admin/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Dima Take Action and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/deepcore/src/admin/theme-options/ReduxCore/inc/extensions/customizer/class-redux-extension-customizer.php:814)

This file is part of the WordPress plugin Deep Core and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/shuuka-social-links/vendor/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Shuuka social links and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/slick-popup/libs/admin/redux-framework/redux-core/inc/extensions/customizer/class-redux-extension-customizer.php:815)

This file is part of the WordPress plugin Slick Popup: Contact Form 7 Popup Plugin and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/fancy-facebook-like-box/fflb-panel/ReduxCore/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Fancy Facebook Like Box and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/thenotes-lite/ReduxCore/inc/extensions/customizer/extension_customizer.php:806)

This file is part of the WordPress theme TheNotes Lite and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/embe-core/inc/redux/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin EmBe Core and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/workshop-butler/lib/ReduxFramework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Workshop Butler and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/dashboard-quick-actions/assets/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Dashboard Quick Actions and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/c4d-plugin-manager/ReduxFramework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin C4D Plugin Manager and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/stb-network-ads/redux-framework/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin STB Network Ads and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/sesame/includes/redux/inc/extensions/customizer/extension_customizer.php:797)

This file is part of the WordPress theme sesame and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/rtbiz/vendor/redux/ReduxCore/inc/extensions/customizer/extension_customizer.php:806)

This file is part of the WordPress plugin rtBiz and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/sophia-twitter-auto-post/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Sophia Twitter Auto Post and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/ascend/themeoptions/redux/inc/extensions/customizer/extension_customizer.php:822)

This file is part of the WordPress theme Ascend and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/smart-coming-soon-mode/admin/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Smart Coming Soon Mode and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/mg-post-contributors/framework/core/extensions/customizer/extension_customizer.php:648)

This file is part of the WordPress plugin MG POST Contributors and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/urban-lite/options/extensions/customizer/extension_customizer.php:648)

This file is part of the WordPress theme Urban Lite and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/woptifications/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Woptifications and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/worth-the-read/options/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Worth The Read and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/pro-team/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin ProTeam and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/cryptocurrency-payment-gateway/admin/redux-framework/inc/extensions/customizer/class-redux-extension-customizer.php:815)

This file is part of the WordPress plugin Cryptocurrency Payment Gateway and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/preloader-for-divi/divipreloader_options/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Preloader for Divi and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/fuse-social-floating-sidebar/framework/redux-core/inc/extensions/customizer/class-redux-extension-customizer.php:815)

This file is part of the WordPress plugin Fuse Social Floating Sidebar and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/cryptocurrency-rocket-tools/frameworks/ReduxFramework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Cryptocurrency Rocket Tools and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/contact-form-control/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Contact Form 7 Manager and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/disable-back-button/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Disable Back Button and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/night-mode-and-font-size-kit/inc/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Night Mode for WordPress and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/pinnacle/themeoptions/redux/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress theme Pinnacle and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/wpgumby/redux/inc/extensions/customizer/extension_customizer.php:830)

This file is part of the WordPress theme wpGumby and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/radix/admin/ReduxCore/inc/extensions/customizer/extension_customizer.php:684)

This file is part of the WordPress theme Radix and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/nimble-portfolio/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Nimble Portfolio and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/embed-video-thumbnail/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:794)

This file is part of the WordPress plugin Embed Video Thumbnail and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/mixed/admin/redux-framework/ReduxCore/extensions/customizer/extension_customizer.php:648)

This file is part of the WordPress theme Mixed and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/virtue/themeoptions/inc/extensions/customizer/extension_customizer.php:822)

This file is part of the WordPress theme Virtue and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/tipalink/includes/admin/framework/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Tipalink and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/stylish-links/options/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Stylish Links and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/search-by-wp-search/ReduxFramework/ReduxCore/extensions/customizer/extension_customizer.php:648)

This file is part of the WordPress plugin Search by WP Search and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/wp-logger-tenbulls/vendor/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin WP Logger - Tenbulls and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/ultimate-widgets-light/assets/admin/redux-core/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Ultimate Widgets Light and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/wooenhancer/admin/redux-framework/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin WooEnhancer - Improve and customize WooCommerce and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/floating-icons/adminside/admin/ReduxCore/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin Floating Icons and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/floating-menu-by-logics-buffer/ReduxFramework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Floating Menu and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/adec-app/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:804)

This file is part of the WordPress plugin ADEC (Advanced Dynamic E-Commerce) and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/recurwp/options/framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin RecurWP and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/kk-i-like-it-2/framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin KK I Like It 2 and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/veal/assets/frameworks/redux/admin/redux-framework/ReduxCore/extensions/customizer/extension_customizer.php:648)

This file is part of the WordPress theme Veal and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/themes/jakobian/admin/ReduxCore/inc/extensions/customizer/extension_customizer.php:684)

This file is part of the WordPress theme Jakobian and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/woobar/inc/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Batil - WordPress Notification Bar and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/wpmovielibrary/includes/framework/redux/ReduxCore/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin WPMovieLibrary and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/fairplayer-sms-gateway/admin/redux-framework/ReduxCore/inc/extensions/customizer/extension_customizer.php:734)

This file is part of the WordPress plugin FairPlayer SMS Gateway and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/smart-variations-images/includes/library/redux-core/inc/extensions/customizer/class-redux-extension-customizer.php:814)

This file is part of the WordPress plugin Smart Variations Images & Swatches for WooCommerce and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare redux_customizer_custom_validation() (previously declared in wp-content/plugins/visualmodo-related-posts/includes/options/core/inc/extensions/customizer/extension_customizer.php:808)

This file is part of the WordPress plugin Visualmodo Related Posts and could be interacting with another theme or plugin and causing a fatal error.

The error occurs because two (or more) plugins that you are using are both trying to declare a function with the same name.