在PDO上的非对象上调用成员函数prepare（）

Question

I am trying to use some remember me class , now the problem is i get

Call to a member function prepare() on a non-object

and i dont get any error's :

index.php :

    try {
    $connection = new PDO('mysql:host=localhost;dbname=ibids', 'root', '');
    } 

catch (PDOException $e)
    {
        printf ($e);
    }

$storage = new Rememberme_Storage_PDO($connection);
$rememberMe = new Rememberme($storage);

i send the connection to this file : pdo.php and using there this code :

class Rememberme_Storage_PDO extends Rememberme_Storage_DB {

  /**
   *
   * @var PDO
   */
  protected $connection;
  public function getConnection() {
    return $this->connection;
  }

  public function setConnection(PDO $connection) {

   try  {
     $this->connection = $connection;
        } 
    catch (PDOException $e)
        {
            printf ($e);
        }
  }
}

And i have the error here on this function :

** this function inside Rememberme_Storage_PDO class

   public function storeTriplet($credential, $token, $persistentToken, $expire=0) {
    $sql = "INSERT INTO {$this->tableName}({$this->credentialColumn}, " .
           "{$this->tokenColumn}, {$this->persistentTokenColumn}, " .
           "{$this->expiresColumn}) VALUES(?, SHA1(?), SHA1(?), ?)";
    $query = $this->connection->prepare($sql);

    if(!$query->execute(array($credential, $token, $persistentToken, date("Y-m-d H:i:s", $expire))))
        {
        die('excute faild');
        }
  }

says :

 Fatal error: Call to a member function prepare() on a non-object in F:\wamp\wwwememberme-master\src\Rememberme\Storage\PDO.php on line 44

I am newbie at PDO , what am i doing wrong ?

Answer 1

It looks like don't have a constructor. If you pass a variable when using new it is passed to the constructor and not a setter. So when using this:

$storage = new Rememberme_Storage_PDO($connection);

… you need in Rememberme_Storage_PDO:

public function __construct(\PDO $connection) {
    $this->setConnection($connection);
}