wpsnoop Fatal error: Cannot redeclare mystartsession()

If you are dealing with a WordPress issue where a PHP Function mystartsession() 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 mystartsession() (previously declared in wp-content/plugins/book-a-room/sharedFunctions.php:111)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/scaleengine-sevu-video-security/scaleengine-sevu-video-security.php:29)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/post-like-dislike/post-like-dislike.php:19)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/posts-pages-changer/posts-pages-changer.php:522)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/webcourier/webcourier.php:25)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/wp-floating-notifications/wp-floating-notification.php:51)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/i-comply-social-media-sharing-protection-compliance-archiving-and-workflow-ap/socialsmart.php:29)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/snoox/snooxWidgets.php:134)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/webful-simple-grocery-shop/wc_simple_shop.php:24)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/custom-single/custom-single.php:19)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/osclass-classifieds/osclass-classifieds.php:61)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/feed-seo/feed-seo.php:108)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/like-computy/like-computy.php:54)

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

PHP Fatal error: Cannot redeclare mystartsession() (previously declared in wp-content/plugins/wp-brightcove-portal/wp-brightcove-portal.php:147)

This file is part of the WordPress plugin WP Brightcove Portal 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.