redisSession

<?php

class redisSession{

/**

* 保存session的数据库表的信息

*/

private $_options = array(

'handler' => null, //数据库连接句柄

'host' => null,

'port' => null,

'lifeTime' => null,

'prefix' => 'PHPREDIS_SESSION:'

);

/**

* 构造函数

* @param $options 设置信息数组

*/

public function __construct($options=array()){

if(!class_exists("redis", false)){

die("必须安装redis扩展");

}

if(!isset($options['lifeTime']) || $options['lifeTime'] <= 0){

$options['lifeTime'] = ini_get('session.gc_maxlifetime');

}

$this->_options = array_merge($this->_options, $options);

}

/**

* 开始使用该驱动的session

*/

public function begin(){

if($this->_options['host'] === null ||

$this->_options['port'] === null ||

$this->_options['lifeTime'] === null

){

return false;

}

//设置session处理函数

session_set_save_handler(

array($this, 'open'),

array($this, 'close'),

array($this, 'read'),

array($this, 'write'),

array($this, 'destory'),

array($this, 'gc')

);

}

/**

* 自动开始回话或者session_start()开始回话后第一个调用的函数

* 类似于构造函数的作用

* @param $savePath 默认的保存路径

* @param $sessionName 默认的参数名，PHPSESSID

*/

public function open($savePath, $sessionName){

if(is_resource($this->_options['handler'])) return true;

//连接redis

$redisHandle = new Redis();

$redisHandle->connect($this->_options['host'], $this->_options['port']);

if(!$redisHandle){

return false;

}

$this->_options['handler'] = $redisHandle;

// $this->gc(null);

return true;

}

/**

* 类似于析构函数，在write之后调用或者session_write_close()函数之后调用

*/

public function close(){

return $this->_options['handler']->close();

}

/**

* 读取session信息

* @param $sessionId 通过该Id唯一确定对应的session数据

* @return session信息/空串

*/

public function read($sessionId){

$sessionId = $this->_options['prefix'].$sessionId;

return $this->_options['handler']->get($sessionId);

}

/**

* 写入或者修改session数据

* @param $sessionId 要写入数据的session对应的id

* @param $sessionData 要写入的数据，已经序列化过了

*/

public function write($sessionId, $sessionData){

$sessionId = $this->_options['prefix'].$sessionId;

return $this->_options['handler']->setex($sessionId, $this->_options['lifeTime'], $sessionData);

}

/**

* 主动销毁session会话

* @param $sessionId 要销毁的会话的唯一id

*/

public function destory($sessionId){

$sessionId = $this->_options['prefix'].$sessionId;

// $array = $this->print_stack_trace();

// log::write($array);

return $this->_options['handler']->delete($sessionId) >= 1 ? true : false;

}

/**

* 清理绘画中的过期数据

* @param 有效期

*/

public function gc($lifeTime){

//获取所有sessionid，让过期的释放掉

//$this->_options['handler']->keys("*");

return true;

}

//打印堆栈信息

public function print_stack_trace()

{

$array = debug_backtrace ();

//截取用户信息

$var = $this->read(session_id());

$s = strpos($var, "index_dk_user|");

$e = strpos($var, "}authId|");

$user = substr($var,$s+14,$e-13);

$user = unserialize($user);

//print_r($array);//信息很齐全

unset ( $array [0] );

if(!empty($user)){

$traceInfo = $user['id'].'|'.$user['user_name'].'|'.$user['user_phone'].'|'.$user['presona_name'].'++++++++++++++++\n';

}else{

$traceInfo = '++++++++++++++++\n';

}

$time = date ( "y-m-d H:i:m" );

foreach ( $array as $t ) {

$traceInfo .= '[' . $time . '] ' . $t ['file'] . ' (' . $t ['line'] . ') ';

$traceInfo .= $t ['class'] . $t ['type'] . $t ['function'] . '(';

$traceInfo .= implode ( ', ', $t ['args'] );

$traceInfo .= ")\n";

}

$traceInfo .= '++++++++++++++++';

return $traceInfo;

}

}

//入口处调用

$handler = new redisSession(array(

'host' => "127.0.0.1",

'port' => "6379"

));

$handler->begin();