$ _SESSION不傳遞頁面之間的值php

Question

我有3個文件。 （loginFunctions.php，login.php，index.php） 在login.php，我採用的值，並將其傳遞到loginFunction.php檢查值和一份聲明中選擇userID將其返回到login.php。之後login.php調用稱爲(get('value'))的方法來通過userID並返回用戶信息。我在登錄頁面和索引頁面開始了會話。我試圖回顯存儲在會話中的信息，但沒有返回。

我的代碼：

loginFunction.php

<?php 

function absolute_url($page = 'index.php') { 
    //header('Location: http:\\localhost'); 
    //exit(); //terminates the script 

    $url = 'http://' . $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF']); 
    $url = rtrim($url, '/\\'); 
    $url .= '/' . $page; 

    return $url; 
} 

function checkLogin($email = '', $password = '') { 
    $errors = array(); 

    if (empty($email)){ 
     $errors[] = 'You must enter your email'; 
    } 
    if (empty($password)){ 
     $errors[] = 'You must enter a password'; 
    } 
    if (empty($errors)) { 
////set up database econnection 
     require_once 'DO_Classes/mysqli_connect.php'; 

     $db = new Database(); 
     $dbc = $db->getConnection(); 

     $stmt = $dbc->prepare("SELECT user_ID FROM User WHERE user_email=? AND AES_DECRYPT(user_password, 'p0ly')=?"); 

     if ($stmt) { 
      $stmt->bind_param('ss', $email, $password); 

      if ($stmt->execute()) { 
       $stmt->store_result(); 
       $stmt->bind_result($user_ID); 
       $stmt->fetch(); 
       $stmt->close(); 
       if(!empty($user_ID)){ 
        return array(true, $user_ID); 
       }else{ 
        /* 
        * <div class=\"alert alert-success alert-dismissable\"> 
           <button type=\"button\" class=\"close\" data-dismiss=\"alert\" aria-hidden=\"true\">&times;</button> 
           Invalid email or password 
          </div> 
        */ 
        $errors[] = '<div class="alert alert-danger alert-dismissable"> 
           <button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button> 
           <p align="center">Invalid email or password</p> 
          </div>'; 
       } 

      } else { 
       $errors[] = 'Passwords do not match'; 
      } 
     }else { 
      echo '<p class="error"> Oh dear. There was a databse error</p>'; 
      echo '<p class = "error">' . mysqli_error($stmt) . '</p>'; 
     } 
    } 
    return array(false, $errors); 
} 

?> 

login.php

<?php 
if (isset($_POST['submitted'])) { 
    //require_once is similar to 'include' but ensures the code is not copied multiple times 
    require_once('Functions/loginFunctions.php'); 

    //list() is a way of assigning multiple values at the same time 
    //checkLogin() function returns an array so list here assigns the values in the array to $check and $data 
    list($check, $data) = checkLogin($_POST['email'], $_POST['password']); 


    if ($check) { 
     //setcookie('FName', $data['FName'], time()+ 900) ; //cookie expires after 15 mins 
     //setcookie('LName', $data['LName'], time() + 900) ; 
     session_start(); 
     require_once 'Classes/DO_Users.php'; 
     $user = new DO_User(); 
     $user->get($data); 
     //use session variables instead of cookies 
     //these variables should now be available to all pages in the application as long as the users session exists 
     $_SESSION['userID'] = $user->userID; 
     $_SESSION['userType'] = $user->userTypeID; 
     $_SESSION['last_activity'] = time(); //your last activity was now, having logged in. 
     $_SESSION['expire_time'] = 60 * 5; //expire time in seconds: three hours (you must change this) 
     //to enable $_SESSION array to be populated we always need to call start_session() - this is done in header.php 
     //print_r is will print out the contents of an array 
     //print_r($_SESSION); 
     // 
     //Redirect to another page 

     $url = absolute_url('index.php'); //function defined in Loginfunctions.php to give absolute path for required page 
     //this version of the header function is used to redirect to another page 
     header("Location: $url"); //since we have entered correct login details we are now being directed to the home page 
     exit(); 
    } else { 
     $errors = $data; 
    } 
} 


if (!empty($errors)) { 
    //foreach is a simplified version of the 'for' loop 
    foreach ($errors as $err) { 
     echo "$err <br />"; 
    } 

    echo '</p>'; 
} 

//display the form 
?> 

在index.php，我叫require_once 'header.php';有session_start();但沒有什麼是回來了，爲什麼呢？

Answer 1

我發現這個問題，那是因爲準備好的聲明。 準備好的聲明不起作用，因爲準備好的聲明的聲明缺失值。