wpsnoop Fatal error: Cannot redeclare callback()

If you are dealing with a WordPress issue where a PHP Function callback() 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 14 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 14 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/promissa/functions.php:64)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/cool-image-share/cool-image-share.php:176)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/onepager/inc/frontend.inc.php:40)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/easy-translate/easy-translate.php:140)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/wp-catalogue/index.php:36)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/pymseo/includes/funciones_wp.php:16)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/guest-blogging/includes/functions.php:327)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/ie6nomore/ie6-no-more.php:12)

This file is part of the WordPress plugin IE6 No More and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/kerk-en-it-parish/functions.php:55)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/question-answer/includes/functions.php:3149)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/cleanssl/index.php:13)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/documentor-lite/core/ajax.php:50)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/nepali-forex-rate/Nepali-forex-rate.php:12)

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

PHP Fatal error: Cannot redeclare callback() (previously declared in wp-content/plugins/facebook-like-or-lock/fbll.php:131)

This file is part of the WordPress plugin Facebook Like-or-Lock 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.