Question

我在登录php时遇到问题。是说注意：未定义的索引：登录..我试着自己修复它，但它最糟糕的T_T请帮助我们

这是有错误的行

>$user = $_SESSION['log']['username'];

这是整个代码＆GT;

<?php
include("session/DBConnection.php");

$user = $_SESSION['log']['username'];
            $query = mysql_query("SELECT * FROM members WHERE username = '$user'") or die (mysql_error()); 
            $display = mysql_fetch_array($query);   ?>

Answer 1

将其更改为：

if(isset($_SESSION['log']['username'])) { // add this IF statement to check the variable is set or not
   $user = $_SESSION['log']['username'];
   $query = mysql_query("SELECT * FROM members WHERE username = '$user'") or die (mysql_error()); 
   $display = mysql_fetch_array($query);
}

Answer 2

可能是因为$_SESSION['log']['username'];为空。

添加测试线，例如：

if(!empty($_SESSION['log']['username']))
    {
     //your sql query
     ....

    }

注意：未定义的索引：log

2 个答案: