我的網(wǎng)站上有一個表單標簽，該表單標簽指向帶電子郵件和/或/沒有描述的PHP頁面。基于該代碼生成查詢，該查詢需要更新這些憑證。該部分代碼有效并且已經(jīng)過測試。問題在于數(shù)據(jù)庫未更新電子郵件憑證，但是如果我將其更新為描述，它將這樣做。該代碼有3個檢查項，如果用戶僅放置他的電子郵件，是否僅放置他的描述或兩者都放置?；诖耍a的工作方式如下：<?phpsession_start();include_once 'connection.php';$id = $_SESSION['user_id'];if(isset($_POST['emailChange']) || isset($_POST['descChange'])){       $desc = $_POST['descChange'];       $email = $_POST['emailChange'];       if(empty($email)){           $query = "UPDATE users SET description = :descr WHERE user_id= :id ;";           $stmt = $conn->prepare($query);           $stmt->bindParam(":descr", $desc);       } else if(empty($desc)){           $query = "UPDATE users SET user_email= :email WHERE user_id= :id ;";           $stmt = $conn->prepare($query);           $stmt->bindParam(":email", $email);       } else{           $query = "UPDATE users SET description = :descr AND user_email = :email WHERE user_id= :id;";           $stmt = $conn->prepare($query);           $stmt->bindParam(":email", $email);           $stmt->bindParam(":descr", $desc);       }       if(!filter_var($email, FILTER_VALIDATE_EMAIL)){           header("Location: ../profile.php?error=invalidEmail");           exit();       }           $stmt->bindParam(":id", $id);           $stmt->execute();   }表單本身看起來像這樣： <form action="assets/upload.php" method="POST">     <input type="text" name="emailChange" class="inputs" id="changeEmail" placeholder = "Enter your new E-mail">     <input type="text" name="descChange" class="inputs" id="changeDesc" placeholder="Enter your description">     <button type="submit" id="btnconfirmCreds" name="changeCreds">Confirm Changes</button> </form>數(shù)據(jù)庫中的名稱如下所示：[user_id][user_username][user_email][user_password][role_id][user_image][description][num_of_posts