我得到

  

致命错误：未被捕获的PDOException：SQLSTATE [HY093]：无效的参数编号：参数未定义” ... PDOStatement-> execute（）＃1 {main}抛出61行。61行为$ stmt-> execute （）;

$add_joke = filter_input(INPUT_POST,'add_joke');

if ($add_joke != NULL){
    $actual_date = date('Y-m-d');
    $actual_id = null;

    $sql = 'INSERT INTO joke (id,JokeText,Joke Date) VALUES (:id,:JokeText,:Joke Date)';
    $stmt = $pdo->prepare($sql);
    $stmt->bindParam(':id',$actual_id);
    $stmt->bindParam(':JokeText',$add_joke);
    $stmt->bindParam(':Joke Date',$actual_date);
    $stmt->execute();

}