MySQL为每个新用户创建一行

7y4bm7vi 于 2023-11-16 发布在 Mysql

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我有一个小问题
我想创建一个脚本，在表中创建一个新的行，如果有一个新的用户和行，更改“点”列为零（0）。
这是我现在的代码：

<?php
header('Content-Type: text/html; charset=Windows-1250');    
$firstName = $_POST['firstname'];
$servername = "db.mysql-01.gsp-europe.net";
$username = "xxxxxxxxxx";
$password = "xxxxxxxxxxx";
$dbname = "xxxxxxxxxxx";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 
// sql to create table
$sql = "UPDATE `member_profile` SET points = points + 1 WHERE user_id = '$firstName'";
if ($conn->query($sql) === TRUE) {
    echo "Thingz created successfully";
} else {
    echo "Error doing sum thingz: " . $conn->error;
}
$conn->close();
?>

字符串
我需要在立方体：当出现新的user_id（$firstName）时，使用此用户名创建新行，并将“points”列从“null”更改为Zero（0）。
谢谢你的时间，我很感激

mysql

来源：https://stackoverflow.com/questions/56233117/mysql-create-a-line-with-every-new-user

1条答案

按热度按时间

qybjjes11#

如果我理解得很好，你要检查用户是否存在。如果用户是新的，创建新的线与用户0点，如果存在increse点与1。

<?php
header('Content-Type: text/html; charset=Windows-1250');  
if(isset($_POST['firstname'])){  
$firstName = $_POST['firstname'];
$servername = "db.mysql-01.gsp-europe.net";
$username = "xxxxxxxxxx";
$password = "xxxxxxxxxxx";
$dbname = "xxxxxxxxxxx";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 
// check if the user exist
$check = "SELECT * FROM `member_profile` WHERE user_id = '$firstName'";
$result = mysqli_query($conn,$check) or die(mysqli_error($conn));
        $rows = mysqli_num_rows($result);
        //if exist increse points with 1
        if($rows>=1){
$sql = "UPDATE `member_profile` SET points = points + 1 WHERE user_id = '$firstName'";
if ($conn->query($sql) === TRUE) {
    echo "Thingz created successfully";
} else {
    echo "Error doing sum thingz: " . $conn->error;
}
        }
        //if don't exist create user with points 0
        if($rows==0)
        {
            $query = "INSERT into `member_profile` (user_id, points) VALUES ( '$firstName' ,'0')";
            $result = mysqli_query($conn,$query)or die(mysqli_error($conn));
$conn->close();
        }
}
?>

字符串
记住，我给了你一个想法，代码容易被SQL注入

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MySQL为每个新用户创建一行

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