wpsnoop Fatal error: Cannot redeclare mh_before_header()

If you are dealing with a WordPress issue where a PHP Function mh_before_header() 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 15 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 15 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-corporate-basic/functions.php:14)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

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

PHP Fatal error: Cannot redeclare mh_before_header() (previously declared in wp-content/themes/mh-magazine-lite/functions.php:25)

This file is part of the WordPress theme MH UrbanMag 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.