main logon funktion

<?php
require"connect_db.php";
$DB_con = connect_db();

//avancerad funktion, skapa ny användare med mail konfirmation?

if (isset($_POST['submit'])) {
    $username = $_POST['myusername'];
    $password = $_POST['mypassword'];


    $credent = $DB_con->prepare('SELECT username,password FROM tbl_users WHERE username = :username');
    $credent->bindParam(':username', $username);

    $credent->execute();
    $results = $credent->fetch(PDO::FETCH_ASSOC);
    if (count($results) > 0 && password_verify($password, $results['password'])) {
        $_SESSION['username'] = $results['username'];
        header('location: index.php');
        exit;
    } else {
        echo  '<p id="credErr">Wrong username/password</p>';
    }
}

?>
<!doctype html>
<html lang="en">
<head>
    <link href="mystyle.css" rel="stylesheet">
    <meta charset="UTF-8">
    <script src="https://w.soundcloud.com/player/api.js" type="text/javascript"></script>
    <script src="http://jqueryjs.googlecode.com/files/jquery-1.3.js" type="text/javascript"></script>

    <title></title>
</head>
<body>

<form class="formLoggin" action="main_login.php" method="post"></br>
    <input name="myusername" placeholder="Username" type="text" class="formLoggin"></br>
    <input name="mypassword" placeholder="Password" type="password" class="formLoggin"></br>
    <input type="submit" name="submit" class="btnloggin" value="Login">
</form>

</body>
</html>