PHP Function for Identity Information Submission

This is a PHP function that handles the submission of identity information for a user. It checks if the request is a POST request, and then validates the user ID parameter. If the parameter is missing, it returns an error.

The function then creates an array with the identity information submitted in the request, and checks if the user already has identity information in the database. If the user has existing identity information, the function updates the information with the new data. If the user does not have existing identity information, the function creates a new entry for the user.

After updating or creating the identity information, the function updates the user's ID status to 2 (which likely means 'verified').

Finally, the function returns a success message with the updated identity data. If the request is not a POST request, it returns an error.