將會話存儲在數據庫中

Question

我編寫了這個幫助程序類來將會話保存在數據庫中，但它似乎根本無法工作。我檢查了session_set_save_handler的返回值，它似乎總是返回一個假值，這意味着它無法首先設置handller功能。然後我試着設置session.auto_start = 0和session.save_handler ='user'，但是這似乎沒有改變任何東西。還有什麼我可以在PHP.ini中更改以使其工作或問題出現在我的課程本身中？

class Session 
{ 
    private $db; 

public function __construct() 
{ 
    //Instantiate new Database object 
    $this->db = new Database(); 

    // Set handler to overide SESSION 
    $return = session_set_save_handler(
     array($this, "open"), 
     array($this, "close"), 
     array($this, "read"), 
     array($this, "write"), 
     array($this, "destroy"), 
     array($this, "gc") 
    ); 

      var_dump ($return); 
    register_shutdown_function ('session_write_close') ; 
    session_start(); 
} 

/** 
* Open function 
* 
* @param none 
* @return bool 
*/ 
public function open() 
{ 
    if ($this->db) { 
     return true; 
    } 
    return false; 
} 

    /** 
* Close function 
* 
* @param none 
* @return bool 
*/ 
public function close() 
{ 
    if($this->db->close()) { 
     return true; 
    } 

    return false; 
} 

/** 
* Read function 
* 
* @param string $id 
* @return mixed 
*/ 
public function read ($id) 
{ 
    $this->db->query('SELECT data FROM sessions WHERE id = :id'); 
    $this->db->bind(':id', $id); 

    if ($this->db->execute()) { 
     $row = $this->db->single(); 
     return $row['data']; 
    } 

    return ''; 
} 

/** 
* Write function 
* 
* @param string $id 
* @param string $data 
* @return bool 
*/ 
public function write ($id, $data) 
{ 
    $access = time(); 
    $this->db->query('REPLACE INTO sessions VALUES (:id, :access, :data)'); 

    $this->db->bind(':id', $id); 
    $this->db->bind(':access', $access); 
    $this->db->bind(':data', $data); 

    if ($this->db->execute()){ 
     return true; 
    } 

    return false; 
} 

/** 
* Destroy function 
* 
* @param string $id 
* @return bool 
*/ 
public function destroy ($id) 
{ 
    $this->db->query('DELETE FROM sessions WHERE id = :id'); 

    $this->db->bind(':id', $id); 

    if ($this->db->execute()) { 
     return true; 
    } 

    return false; 
} 

/** 
* Garbage collector function 
* 
* @param int $maxLifeTime 
* @return bool 
*/ 
public function gc ($maxLifeTime){ 
    $old = time() - $maxLifeTime; 

    // Delete expired sessions from the database 
    $this->db->query('DELETE * FROM sessions WHERE access < :old');  
    $this->db->bind(':old', $old); 

    if($this->db->execute()) { 
     return true; 
    } 

    return false; 
} 
} 

下面是我使用的存儲會話表的數據庫結構：

CREATE TABLE `sessions` (
    `id` char(32) NOT NULL, 
    `data` text NOT NULL, 
    `access` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, 
    PRIMARY KEY (`id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1; 

Answer 1

我通過看這裏的例子固定它：

http://phpsecurity.org/code/ch08-2