在注册页面中插入用户名时，它在 phpmyadmin 数据库中变为零 (0)

Question

我正在使用 000webhost 到我的 android 登录/注册应用程序，当输入数据时，所有列都填充到数据库中，除了用户名它变成零并且没有错误

注册.php

<?php

    $name = $_POST["name"];

    $age = $_POST["age"];

    $username = $_POST["username"];

    $password = $_POST["password"];

    $statement = mysqli_prepare($con, "INSERT INTO user (name, username, age, password) VALUES (?, ?, ?, ?)");

    mysqli_stmt_bind_param($statement, "siss", $name, $username, $age, $password);

    mysqli_stmt_execute($statement);

    $response = array();

    $response["success"] = true;  

    echo json_encode($response);

?>

登录.php

    $username = $_POST["username"];

    $password = $_POST["password"];

    $statement = mysqli_prepare($con, "SELECT * FROM user WHERE username = ? AND password = ?");

    mysqli_stmt_bind_param($statement, "ss", $username, $password);

    mysqli_stmt_execute($statement);

    mysqli_stmt_store_result($statement);

    mysqli_stmt_bind_result($statement, $userID, $name, $age, $username, $password);

    $response = array();

    $response["success"] = false;  

    while(mysqli_stmt_fetch($statement)){

        $response["success"] = true;  

        $response["name"] = $name;

        $response["age"] = $age;

        $response["username"] = $username;

        $response["password"] = $password;

    }

    echo json_encode($response);

?>

Answer 1

在您调用 bind param 时，您将用户名定义为整数 (i) ...mysqli_stmt_bind_param($statement,&nbsp;"siss",&nbsp;$name,&nbsp;$username,&nbsp;$age,&nbsp;$password);这应该是 s 以将其保留为字符串，并且年龄可能是整数。mysqli_stmt_bind_param($statement,&nbsp;"ssis",&nbsp;$name,&nbsp;$username,&nbsp;$age,&nbsp;$password);