Please help me to code with MySQL/php.

Unique User Names In this assignment, you will create a system to guarantee unique usernames in your file. This assignment is due by Sunday of Week 9 by 11:59 pm PST Project Instructions 1. Create a system to guarantee unique usernames in register.php. Hints: Before you attempt to create the directory, use PHP to check your list of existing usernames for a match to the just-registered name. If no match is found, the new name is acceptable. If the username is already in use, then PHP can create an error message requesting a new username. 2. Use the examples in the Ullman text as a guideline. Chapters 8 - 11 have some good examples and information for you. (Note: do not copy the code from the text - it is there as a resource for you.) As you complete the project, be sure that you are using the correct format and syntax as well as the appropriate structure for your coding.