On HTML page 1 I ask for a first name and last name. When the form is submitted, the first initial of the first name and full last name are combined to create a string $fullname. $fullname is entered in a MySQL database as a unique identifer. Because of the nature of the string, it can be any number of characters long (...unless theres some way to make the string...7 charachters? Which would require short names, like jlee, to have extrac character added to the end?) Anyways, how do I ensure that noone will ever have the exact same identifier. For example, if James Hawthorne and Jill Hawtorne, 2 unrelated people, fill out the form, they won't both have the identifier jhawthorne. How do I do this?

Sketch