Question

我正在为网站构建登录和注册表单，但是注册时遇到问题。当用户注册时，仅将密码存储在数据库中，则用户名和电子邮件不会存储在数据库中。

这是服务器代码：

        $sql = "INSERT INTO accounts (username, password, email) VALUES (?, ?, ?)";

    if($stmt = mysqli_prepare($con, $sql)){
        // Bind variables to the prepared statement as parameters
        mysqli_stmt_bind_param($stmt, "sss", $param_username, $param_password, $param_email);

        // Set parameters
        $param_username = $username;
        $param_password = password_hash($password, PASSWORD_DEFAULT); // Creates a password hash
        $param_email = $email;

        if(mysqli_stmt_execute($stmt)){
            // Redirect to login page
            header("location: home.php");
        } else{
            echo "Something went wrong. Please try again later.";
        }
    }

    mysqli_stmt_close($stmt);
}

mysqli_close($con);
 ?>

这是注册表格：

    <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
        <label for="username">
                <i class="fas fa-user"></i>
            </label>
            <input type="text" name="username" placeholder="Username" id="username" required value="<?php echo $username; ?>">
            <span ><?php echo $username_err; ?></span>


            <label for="text">
                <i class="fas fa-lock"></i>
            </label>

            <input type="text" name="email" placeholder="email address" id="email" required  value="<?php echo $email; ?>">             



            <label for="password">
                <i class="fas fa-lock"></i>
            </label>

            <input type="password" name="password" placeholder="Password" id="password" required  value="<?php echo $password; ?>">



            <label for="confirm_password">
                <i class="fas fa-lock"></i>
            </label>
            <input type="password" name="confirm_password" placeholder="confirm password" id="password" required  value="<?php echo $confirm_password; ?>">


            <input type="submit" value="submit">
        <p>Already have an account? <a href="index.php">Login here</a>.</p>
    </form>

Answer 1

因为在参数设置值之前绑定了参数。绑定参数时，如果您的代码值为$ param_username，$ param_password和$ param_email，则为null。之后，设置参数值。

// Set parameters
        $param_username = $username;
        $param_password = password_hash($password, PASSWORD_DEFAULT); // Creates a password hash
        $param_email = $email;

//Bind Param
mysqli_stmt_bind_param($stmt, "sss", $param_username, $param_password, $param_email);

Answer 2

尝试一下：

$sql = "INSERT INTO accounts (username, password, email) VALUES (?, ?, ?)";

    if($stmt = mysqli_prepare($con, $sql)){

        !empty($username) or die("empty username");
        $param_username = $username;
        $param_password = password_hash($password, PASSWORD_DEFAULT);
        !empty($email) or die("empty email");
        $param_email = $email;

        // Bind variables to the prepared statement as parameters
        mysqli_stmt_bind_param($stmt, "sss", $param_username, $param_password, $param_email);


        if(mysqli_stmt_execute($stmt)){
            // Redirect to login page
            header("location: home.php");
        } else{
            echo "Something went wrong. Please try again later.";
        }
    }

    mysqli_stmt_close($stmt);
}

mysqli_close($con);

用户名和电子邮件未存储在mysql中，但是密码是为什么

2 个答案: