Input my php in mysql without repeat?

Question

I create this code to add some data in my db without repeat.
but that is not work and I can\'t add data create by this php to my table.
what\'s the problem ?
P.S: I

Answer 1

I am surprised that this does not throw any errors. One as Barmar mentioned, you cannot mix sqli and sql functions.

Also logically, I do not see you select any database.

Try this first

$con=mysqli_connect("localhost","my_user","my_password","my_db") or die('error message');

then use

mysqli_query($con,"your query here");

let me know the results.