Does not handle serialized objects

[bradt]

Some plugins store serialized objects in the database, but this plugin currently only handles serialized arrays. An example, is the GD Star Rating plugin, which stores a serialized object containing URL strings that need replacing in a migration.

[bradt]

This looks like very good code to handle this:
https://github.com/wp-cli/wp-cli/blob/master/php/utils.php#L226