Php please help me with this questions because I have an exam tomorrow 😭 😭

Question

1-The symbol that is used to negate or deny(نفي) the condition and it has the meaning of Not in php language (! Or & or ==)
2-for not repeating data in data rule schedule(جدول قاعدة البيانات)we set or adjust the quality (unique or text or number)

Answer 1

If the options inside the parentheses are the choices:

1) ! is the negation operator
2) unique means no duplicate data.

Answer 2

You're welcome, and best of luck with the exam 👍

Answer 3

Thank you very much man💖
God bless you

Answer 4

God willing
Thanks 💖