注意：未定义索引：日志

Question

我遇到登录到php的问题。是说注意：未定义指数：登录..我试图修复它在我自己的，但它只是得到了最坏的T_T请帮我家伙

这里是有错误

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

这里是线整个代码 >

<?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

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

大概贝科使用$_SESSION['log']['username'];为空。

加线测试它，例如：

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

    }