mysqli_query() always return true

Question

This is my form:

Answer 1

$r will only be false if there was SQL error. Otherwise it will always return a resource ID even if no rows are returned by your SELECT statement.

Use mysqli_num_rows() to count how many rows are returned. Zero means no one is using that email address.

if(mysqli_num_rows($r))
    echo "Email address exists!";
else
    echo "sss";