dongzhaiqiang6108 2018-03-07 10:44
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注意:未定义的索引:php中的用户名和密码[重复]

I'm working with db connection, from what it looks like to me when I finish writing it on sublime there's no error. so, I decided to write localhost/*folder*/*filename*.php in my browser to check the connection and suddenly the browser display;

Notice: Undefined index: username in C:\xampp\htdocs\Login\login.php on line 4 Notice: Undefined index: pincode in C:\xampp\htdocs\Login\login.php on line 5 {"success":false}

<?php
    $con = mysqli_connect("localhost", "root", "", "test");

    $Username = $_POST["username"];
    $Pincode = $_POST["pincode"];

    $statement = mysqli_prepare($con, "SELECT * FROM users WHERE username = ? AND pincode = ?");
    mysqli_stmt_bind_param($statement, "ss", $Username, $Pincode);
    mysqli_stmt_execute($statement);

    mysqli_stmt_store_result($statement);
    mysqli_stmt_bind_result($statement, $id, $Username, $Pincode);

    $response = array();
    $response["success"] = false;  

    while(mysqli_stmt_fetch($statement)){
        $response["success"] = true;  
        $response["id"] = $id;
        $response["username"] = $Username;
        $response["pincode"] = $Pincode;
    }

    echo json_encode($response);
?>
</div>
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3条回答 默认 最新

  • dppi5167 2018-03-07 10:53
    关注

    You want to check if Username and pincode were sent before querying the db. If they are not passed then your query doesn't have to be run.

    if(isset($_POST['username']) && isset($_POST['pincode'])){
       $con = mysqli_connect("localhost", "root", "", "test");
    
       $Username = $_POST["username"];
       $Pincode = $_POST["pincode"];
    
       ... etc.
    } else {
       echo "Username or pincode missing";
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
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