PDO ERROR

function setProperCollation($character, $collation)
    {
        $tables = $this->getAllTables();

        for ($i = 0; $i < count($tables); $i++)
        {
            try
            {
                $newSettings = $this->conn->prepare('ALTER TABLE ? CONVERT TO CHARACTER SET ? COLLATE ?');
                $newSettings->bindParam(1, $tables[$i][0], PDO::PARAM_STR);
                $newSettings->bindParam(2, $character, PDO::PARAM_STR);
                $newSettings->bindParam(3, $collation, PDO::PARAM_STR);
                $newSettings->execute();
            } catch (PDOException $e)
            {
                echo "Error: " . $e->getMessage() . "<br>";
                die();
            }
        }

        echo "Done";
    }


// Error: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;
// check the manual that corresponds to your MySQL server version for the right syntax to use near
// '? CONVERT TO CHARACTER SET ? COLLATE ?' at line 1