Warning: mysqli_real_escape_string() expects exactly 2 parameters, 1 given… what i do wrong?

Question

I try make php login but i get this error: Warning: mysqli_real_escape_string() expects exactly 2 parameters, 1 given, what I do wrong?

register.php

Answer 1

From the documentation , the function mysqli_real_escape_string() has two parameters.

string mysqli_real_escape_string ( mysqli $link , string $escapestr ).

The first one is a link for a mysqli instance (database connection object), the second one is the string to escape. So your code should be like :

$username = mysqli_real_escape_string($yourconnectionobject,$_POST['username']);