php 中的 for 和 SQL update 的正确语法是什么？

Question

我正在尝试使用 html 和 php 更新数据库中的条目。但是，我不断收到一条错误消息，说我的 sql 语法错误。

这是 php 文件中的代码：

<?php 
$server = "127.0.0.1";
$dbUsername = "root";
$dbPassword = "";
//create connection
$dbconn = new mysqli($server, $dbUsername, $dbPassword, $dbname);

 $email_follow = $_POST['email_follow'];
 $follow = $_POST['follow'];

 $update = mysqli_query($dbconn, "UPDATE CustomerDetails SET Follow Up = '$follow' WHERE Email = '$email_follow'");

if ($dbconn->query($update) === TRUE) {
echo "Record updated successfully";
} else {
echo "Error updating record: " . $dbconn->error;
}
 ?>

这是 html 表格：

<form action="cust_details_followup.php" method="post">       

Email:
<input type="email" name="email_follow" id="email_follow">

Enter Follow Up Details:
<input type="text" name="follow" id="follow">


<input type="submit" value="Update">

</form>

感谢任何帮助。谢谢！

Answer 1

需要使用点运算符并且需要使用刻度而不是单引号

Tick - Follow Up - Correct.

$query = "UPDATE CustomerDetails
    SET `Follow Up` = '".$follow."'
    WHERE Email = '".$email_follow."'";

$update = mysqli_query($dbconn, $query);

Answer 2

你table属性Follow Up有一个space，你需要加`包起来

所以改变

UPDATE CustomerDetails SET Follow Up = '$follow' WHERE Email = '$email_follow'

到

UPDATE CustomerDetails SET `Follow Up` = '$follow' WHERE Email = '$email_follow'

Answer 3

试试下面的代码

UPDATE CustomerDetails SET `Follow Up` = '".$follow."' WHERE Email = '".$email_follow."'

php 中的 for 和 SQL update 的正确语法是什么？

What is the correct syntax to for and SQL update in php?

html

php

mysql

xampp