wpsnoop Fatal error: Cannot redeclare custom_css_cache_delete()

If you are dealing with a WordPress issue where a PHP Function custom_css_cache_delete() 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 19 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 19 different instances of potential conflicts where different plugins or themes share the function name.

Examples of this error include:

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/inception/inc/functions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/envince/inc/functions/custom-css.php:20)

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

PHP Fatal error: Cannot redeclare custom_css_cache_delete() (previously declared in wp-content/themes/omega/lib/extensions/custom-css.php:20)

This file is part of the WordPress theme Lifestyle 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.