Multidimensional helper function.

Will attempt to fetch a specific value from a multidimensional array.

Will attempt to check if a specific value in a multidimensional array is set.

Will attempt to replace a specific value in a multidimensional array.

Fetch and sanitize the $_POST value for the setting.

Add filters to supply the setting’s value when accessed.

Sanitize an input.

Checks user capabilities and theme supports, and then saves the value of the setting.

Save the value of the setting, using the related API.

Fetch the value of the setting.