Question

我正在尝试为数据库中的用户添加点数。应该如何运作的方式如下：当有人发送另一些积分时，它应计算当前余额并将积分添加给用户。

到目前为止，我尝试了但它一直发送空白数字，而mysql并没有将这些点加起来。

我还包括代码：

if(isset($_POST['points'], $_POST['user'])){

include_once("database_connect.php");

$points = mysqli_real_escape_string($database_connect, $_POST['points']);
$touser = mysqli_real_escape_string($database_connect, $_POST['user']);
$user = "someone";

$addup = "SELECT amount FROM points (SUM(amount)+SUM('$payment'))";

    $sql = "INSERT INTO currency (amount, from, touser, datemade)       
             VALUES('$addup','$user','$touser','$datemade')";
    $query = mysqli_query($database_connect, $sql); 
    echo "<h1>Thank You</h1><h2>Your payment has been made</h2>";
    exit();}

＆GT？; 对于网页： <html> <head> </head> <body> <form name="form1" method="post" action=""> <label for="points">points</label> <input type="text" name="points" id="points"> <label for="user">user</label> <input type="text" name="user" id="user"><input name="submit" type="submit" value="submit"> </form> </body> </html>

我期待您的投入。

Answer 1

尝试使用insert . . . select：

在一个语句中执行此操作

$sql = "INSERT INTO currency(amount, from, touser, datemade) 
          SELECT SUM(amount)+SUM($payment), '$user','$touser','$datemade'
           FROM points"  ;

$ = mysqli_execute($database_connect, $sql);

原始查询的问题如下：

SELECT amount FROM points (SUM(amount)+SUM('$payment'))";

sum('$payment')取一个常量字符串的总和。另外，

总结数据库中已经发送的点数

1 个答案: