When i click login it says error

[Metorium]

When i press login i get Fatal error: Call to a member function query() on a non-object in /home/a5347792/public_html/login.php on line 15

<?php

$dbConnection['username'] = "root";
$dbConnection['password'] = "";
$dbConnection['host'] = "localhost";
$dbConnection['db'] = "joke";


if(isset($_POST['rbLgn'])) {
  $login = true;
  if(isset($_POST['username'])) { $username = $_POST['username']; }
  if(isset($_POST['password'])) { $password = $_POST['password']; }
  if(isset($username) && isset($password)) {
    $query = $db->query("SELECT * FROM `users` WHERE `username`='{$username}' AND `password`='{$password}' LIMIT 1");
    if($query->num_rows > 0) {
      echo "User found - logging in.";
    }
    else
    {
      echo "User not found, credentials: " . $username . " | " . $password;
    }
  }
}
?>

Edited October 25, 2014 by mac_gyver
code tags when posting code please

[maxxd]

The variable $db isn't instantiated anywhere before you try to use it. You'll need to create a $db object using the credentials you put in the $dbConnection array. Also, please use code tags when posting code (the '<>' button on the editor).

[maxxd]

For the sake of others having similar issues in the future, let's keep the discussion in the thread. Read up on PDO here. You'll want to look at the __construct() function I directly linked to, as well as prepare(), bind(), query() and execute().