I\'m actually creating a web application using PHP and seek help verifying a user. As with certain websites, when you register, an e-mail is sent to you with a confirmation
Patricks answer is correct altough i want to point out that there are other possibilities!
You don't necessarily have to create and store a unique token in your database. This is data overhead that is only needed once.
You could also take advantage of one-way hashing.
For example send the user the code md5('my-secret-application-token'.$user_email_adress).
You can validate that just the same way but dont need to store a secret code.