php - session 未保存为 id

Question

基本上，我一直在为我的 PHP 代码的未知问题而烦恼。

代码(login_config.php):

    <?php   
session_start();                    //POST VARIABLES
                        $submit = $_POST['login_submit'];
                        $password = $_POST['login_password'];
                        $email = $_POST['login_email'];



if(isset($submit)){
   require 'password_config.php';
   require 'connect.php';

//PASSWORD VERIFYING
   $pass_query = "SELECT password FROM users WHERE email='$email'";
   $queried = mysql_query($pass_query);
   while($row = mysql_fetch_array($queried)){
   $user_pass = $row['password'];
   $veri_password = password_verify($password, $user_pass);
   }
   if($veri_password != true){$errors[] = '-Account does not exist ';}
   elseif($veri_password = true){

//CHECKING NUM ROWS
   $sql = "SELECT id, username FROM users WHERE email='$email'";
   $entered_user = mysql_query($sql);
   $num_rows = mysql_num_rows($entered_user);
   //STORING ID AS SESSION
   while($row1 = mysql_fetch_array($entered_user)){
   //PROBLEM IS HERE 
   $row1['id'] = $id;
   }

//ERRS ARRAY ESTABLISHED
   $errors = array();

//FURTHER VERIFYING
   if( empty($password) || empty($email) )
   {
   $errors[] = 'Please do not leave fields empty';
   }
   elseif( $num_rows != 1 )
   {
   $errors[] = '-Account does not exist ';
   }
   elseif( $num_rows == 1 )
   {
   $id = $_SESSION['key'];

      header('Location: profile.php');
      exit();
      }
   }

   }
?>

问题:为什么当我通过 header() 重定向到 profile.php 时，$_SESSION['key'] 值为空？我一直在使用 var_dump() 来证明这一点。我希望我的 session key 具有数据库中用户 ID 的值，并且我发现我的代码没有问题。

Answer 1

首先，$id 变量在任何地方都未定义。

执行$row1['id'] = $id;意味着将$id值分配给$row1['id'] 如果你想将用户 ID 存储在 $id 中，那么你应该使用

$id = $row1['id'];

与$id = $_SESSION['key']; 相同的错误这意味着将$_SESSION['key']分配给$id。如果您想在 session 中存储 $id 值:

$_SESSION['key'] = $id;