Help with check login
<?php
       ini_set('display_errors', 'On');
error_reporting(E_ALL | E_STRICT);



              $mysqli=new mysqli("localhost", "***", "***","***") ;
              if(!$mysqli){
                die("Database error");
                }


              function checklogin($username, $password){
                global $mysqli;


                $result = $mysqli->prepare("SELECT * FROM users WHERE username = ? and password=?");
                $result->bind_param("ss", $username, $password);
                $result->execute();

            if($result != false){

                $dbArray=$result->fetch();


                if(!$dbArray){
                    echo '<p class="statusmsg">The username or password you entered is incorrect, or you haven't yet activated your account. Please try again.</p><br/><input class="submitButton" type="button" value="Retry" onClick="location.href='."'login.php'">";
                    return;
                }
                $_SESSION['username']=$username;

                if(isset($_POST['remember'])){
                    setcookie("jmuser",$username,time()+60*60*24*356);
                    setcookie("jmpass",$password ,time()+60*60*24*356);
                }
                echo'<p class="statusmsg"> You have successfully logged in. You will now be redirected to the homepage.</p>';
            redirect();
            }

            else{
                echo'<p class="statusmsg">  The username or password you entered is incorrect. Please try again.</p><br/>input class="submitButton" type="button" value="Retry" onClick="location.href='."'login.php'">";
                return;
            }
        }

                if(isset($_COOKIE['jmuser']) && isset($_COOKIE['jmpass'])){

                $status=checkCookie($_COOKIE['jmuser'], $_COOKIE['jmpass']);
                if($status==true){
                    echo '<p class="statusmsg"> Welcome back '.$_COOKIE['jmuser'].'. You will now be redirected to the homepage.</p>';
                    sleep(5);
                    redirect();

                }
            }

       else{


        if(isset($_POST['sublogin'])){

        if(( strlen($_POST['user']) >0) && (strlen($_POST['pass']) >0)) {

            checklogin($_POST['user'], $_POST['pass']);

        }
        elseif((isset($_POST['user']) && empty($_POST['user'])) || (isset($_POST['pass']) && empty($_POST['pass']))){

            echo '<p class="statusmsg">You didn't fill in the required fields.</p><br/><input class="submitButton" type="button" value="Retry" onClick="location.href='."'login.php'">";

        }
        }
        else{

            echo '<p class="statusmsg">You came here by mistake, didn't you?</p>';

        }


        }

<?php
if(isset($_GET['url'])){

function redirect() {
    header('location:'.$_GET['url']);
}
}
else {
    function redirect() {
        header('location: index.php');
        }
        }

?>

setcookie("jmuser",$username,time()+60*60*24*356);
setcookie("jmpass",$password ,time()+60*60*24*356);