PHP/PDO select data from database with session variable

I have got the following issue, which I can't seem to solve. I'm using PDO with MySQL in the following function:

public function checkST($database) {
        if (isset($_SESSION['user'])) {
            $ticket = $_SESSION['user']['session_ticket'];
            $check = $database->query("SELECT * FROM users WHERE session_ticket = 'ST-627eed61b0dcc8fe04068e23c9e9ace10fd59cf7-8104' LIMIT 1");         
            $result = $check->fetchColumn();
            var_dump($result);
            if ($result != 1) {
                header('Location: ../?p=login');
            }
        } else {
            header('Location: ../?p=login');
        }
    }


$ticket = $_SESSION['user']['session_ticket'];
            $check = $database->query("SELECT * FROM users WHERE session_ticket = '".$ticket."' LIMIT 1");          
            $result = $check->fetchColumn();开发者_JAVA百科
            var_dump($result);

returns:

bool(false)

But when I insert my session ticket like:

$ticket = $_SESSION['user']['session_ticket'];
            $check = $database->query("SELECT * FROM users WHERE session_ticket = 'ST-627eed61b0dcc8fe04068e23c9e9ace10fd59cf7-8104' LIMIT 1");         
            $result = $check->fetchColumn();
            var_dump($result);

it returns:

string(1) "1"

which is the expected result.

It is not so clear.. however try this:

$check = $database->query('SELECT * FROM users WHERE session_ticket = '.$ticket.' LIMIT 1');