wpsnoop Function book_landing_page_is_newsletter_activated() conflicts found in plugins 2 themes

A php function called book_landing_page_is_newsletter_activated() is used in 2 wordpress plugins/themes and could produce a potential conflict if the wrong combination of themes and plugins is used on your site.

To prevent this from happening developers are encouraged to use namespaces and scopes that isolate their functions from colliding with other functions but this is not always done correctly.

We hope this reference helps you to find PHP Fatal error: Cannot redeclare book_landing_page_is_newsletter_activated()

The following 2 themes register a function called book_landing_page_is_newsletter_activated():

Theme
Author Landing Page
Book Landing Page