Fatal error: Call to a member function query() on a non object

Question

I\'ve got this error:

Fatal error: Call to a member function query() on a non-object in /Applications/XAMPP/xamppfiles/htdocs/login.php on line 8

The line is

Answer 1

function check_login($user,$pw,&$result){
    global $mysqli;
    $res = $mysqli->query("SELECT * FROM user WHERE user='$user' and password='$pw'");
    $cont = 0;
    while($row = $re[...]

Mind the "global". This puts the var in the scope of your method. This is a quick and dirty solution, but will work in this case.