Here is a script idea you can use to validate a stored value that you might have for users (such as a PIN) against their registration data. This example will assume that you only want to allow certain registrations for people who you already have data on (in this example, their name) and you want to validate that the user registering is that person. This example will use PIN assigned to the user’s data that we have and the script will validate the PIN provided at registration or will halt registration.
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About Chad Butler
Chad Butler is both a freelance writer and web developer. He has developed several popular WordPress plugins, including WP-Members and his writing has appeared on forbes.com, sfomag.com, and investopedia.com.