wpsnoop Function validate_callback_function() conflicts found in 2 plugins and 2 themes

A php function called validate_callback_function() is used in 4 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 validate_callback_function()

The following 2 plugins register a function called validate_callback_function():

Plugin
Content Planner
imPress

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

Theme
Screens
Asteria Lite