Advanced title and content field array values should be converted automatically to string + separator

[ernestmarcinko]

Describe the bug

When not using ACF, if the field value is returned as an array or object, then it should be automatically converted to to a string. An additional field argument should be implemented: separator="," which is used when joining the values.

Todo

• [x] Utils\Str::anyToString signature should be changed to accept a delimiter, and level moved to the 3rd argument
• [x] Utils\Str::anyToString should also integrate maybe_unserialize() to properly convert the value
• [x] Make sure it's implemented in both Post\getCFValue and User\getCFValue
• [x] Add separator field argument
• [x] Test
• [x] Documentation

Reference ticket.

[ernestmarcinko]

Added to 4.26.5-dev and backend-refactor (via cherry pick)