wpsnoop Fatal error: Cannot redeclare getdomain()

If you are dealing with a WordPress issue where a PHP Function getdomain() 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 10 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 10 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/vsm/vsm.php:17)

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

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/tt-cloudflare-wpmu-plugin/tt_cloudflare_wpmu.php:25)

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

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/apex-digital-toolbox/includes/apex_toolbox_functions.php:18)

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

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/wp-flash-img-show/inc.extend.php:10)

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

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/seo-crawlytics/include/common.php:26)

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

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/pingbacks-on-comments/pingback-on-comments.php:187)

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

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/fusionspan-impexium-single-sign-on/wp-bootstrap/src/WP/helpers.php:445)

This file is part of the WordPress plugin fusionSpan | Impexium Single Sign On and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/fusionspan-memsuite-single-sign-on/wp-bootstrap/src/WP/helpers.php:445)

This file is part of the WordPress plugin fusionSpan | Membersuite Single Sign On and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/rss-feed-news-blocks-free/RSS_news_blocks.php:417)

This file is part of the WordPress plugin RSS Feed News Blocks Free and could be interacting with another theme or plugin and causing a fatal error.

PHP Fatal error: Cannot redeclare getdomain() (previously declared in wp-content/plugins/apptivo-business-site/inc/define.php:1357)

This file is part of the WordPress plugin Apptivo Business site Plugin 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.