名站导航为爱好php程序的朋友们提供php相关的教程知识。
下面是Session保存到数据库的PhP程序类，和大家分享下，欢迎拍砖的哈，拍的时候看着点就行哈！
<?php
class SessionToDB
{
private $_path = null;
private $_name = null;
private $_pdo = null;
private $_ip = null;
private $_maxLifeTime = 0;
public function __construct(PDO $pdo)
{
session_set_save_handler(
array(&$this, 'open'),
array(&$this, 'close'),
array(&$this, 'read'),
array(&$this, 'write'),
array(&$this, 'destroy'),
array(&$this, 'gc')
);
$this->_pdo = $pdo;
$this->_ip = !empty($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : null;
$this->_maxLifeTime = ini_get('session.gc_maxlifetime');
}
public function open($path,$name)
{
return true;
}
public function close()
{
return true;
}
public function read($id)
{
$sql = 'SELECT * FROM session where PhP程序SESSID = ?';
$stmt = $this->_pdo->prepare($sql);
$stmt->execute(array($id));
if (!$result = $stmt->fetch(PDO::FETCh_ASSOC)) {
return null;
} elseif ($this->_ip != $result['client_ip']) {
return null;
} elseif ($result['update_time'] $this->_maxLifeTime < time()){
$this->destroy($id);
return null;
} else {
return $result['data'];
}
}
public function write($id,$data)
{
$sql = 'SELECT * FROM session where PhP程序SESSID = ?';
$stmt = $this->_pdo->prepare($sql);
$stmt->execute(array($id));
if ($result = $stmt->fetch(PDO::FETCh_ASSOC)) {
if ($result['data'] != $data) {
$sql = 'UPDATE session SET update_time =? , date = ? WhERE PhP程序SESSID = ?';
$stmt = $this->_pdo->prepare($sql);
$stmt->execute(array(time(), $data, $id));
}
} else {
if (!empty($data)) {
$sql = 'INSERT INTO session (PhP程序SESSID, update_time, client_ip, data) VALUES (?,?,?,?)';
$stmt = $this->_pdo->prepare($sql);
$stmt->execute(array($id, time(), $this->_ip, $data));
}
}
return true;
}
public function destroy($id)
{
$sql = 'DELETE FROM session WhERE PhP程序SESSID = ?';
$stmt = $this->_pdo->prepare($sql);
$stmt->execute(array($id));
return true;
}
public function gc($maxLifeTime)
{
$sql = 'DELETE FROM session WhERE update_time < ?';
$stmt = $this->_pdo->prepare($sql);
$stmt->execute(array(time() - $maxLifeTime));
return true;
}
}
try{
$pdo = new PDO('mysql:host=localhost;dbname=rphp4zf', 'root','rickyfeng');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
new SessionToDB($pdo);
} catch(PDOException $e) {
echo 'Error: '.$e->getMessage();
}
好了关于php程序的知识就说到这里希望可以帮助需要的朋友。,如何决策项目是否要用PhP程序框架来开发
