class session Warning session_start（）in php 5.4

我在我的文件中有發佈者php get in index.php消息 Warning：session_start（）：無法發送會話緩存限制器 - 已經發送的頭文件（輸出開始於/ Users/[用戶名在/Users/[username]/Sites/application/Core/session.php在線20class session Warning session_start（）in php 5.4

<?php 
// A class to help work with Sessions 
// In our case, primarily to manage logging users in and out 

// Keep in mind when working with sessions that it is generally 
// inadvisable to store DB-related objects in sessions 


require_once('includes/initialize.php'); 

class Session{ 


    private $logged_in=false; 
    public $id; 


    function __construct() { 
     //@ob_start(); 
     session_start(); 
     $this->check_login(); 

     if($this->logged_in) { 

     }else{ 

     } 


    } 


    public function is_logged_in() { 
     return $this->logged_in; 
    } 

    public function login($username) { 
    // database should find user based on username/password 
     if($username){ 
      $this->id = $_SESSION['id'] = $username->id; 
      $this->logged_in = true; 
     } 
    } 


    public function logout() { 
     unset($_SESSION['id']); 
     unset($this->id); 
     $this->logged_in = false; 
    } 



    private function check_login() { 
     if(isset($_SESSION['id'])) { 
      $this->id = $_SESSION['id']; 
      $this->logged_in = true; 
     } else { 
      unset($this->id); 
      $this->logged_in = false; 
     } 
    } 
} 

$session = new Session(); 

?>

來源

2014-09-04 Abdulaziz AL-Rushiad

檢查'/用戶/ [用戶名] /Sites/application/Core/users.php：3'它迴應什麼？即使是''以外的空白也被認爲是輸出 – bansi 2014-09-04 16:26:37

session_start();具有] /Sites/application/Core/users.php:3）任何事情之前被調用。您需要將其從您的構造函數中取出並放在require_once聲明之前。

來源

2014-09-04 16:26:26

class session Warning session_start（）in php 5.4

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