session.auto_start = 0

session.save_path = '/temp'

; http://php.net/session.cookie-secure
;session.cookie_secure =

; Lifetime in seconds of cookie or, if 0, until browser is restarted.
; http://php.net/session.cookie-lifetime
session.cookie_lifetime = 0

; The path for which the cookie is valid.
; http://php.net/session.cookie-path
session.cookie_path = /

; The domain for which the cookie is valid.
; http://php.net/session.cookie-domain
session.cookie_domain =

; Whether or not to add the httpOnly flag to the cookie, which makes it inaccessible to browser scripting languages such as JavaScript.
; http://php.net/session.cookie-httponly
session.cookie_httponly =

//session_set_cookie_params(有效期，有效路径，有效域，是否仅安全传输连接，是否HTTPOnly);
session_set_cookie_paramas(60,'/','me.com',true,true);
session_start();

//删除当前会话对应的session数据区并关闭session机制（周期结束后无法持久化）
session_destroy();
//$_SESSION还是存在的

$_SESSION = array();

session_destroy();
unset($_SESSION);
setcookie('PHPSESSID',"",time()-1);
//PHPSESSID称之为session.name 可通过php.ini配置
//可通过session_name()获取当前值
; Name of the session (used as cookie name).
; http://php.net/session.name
session.name = PHPSESSID

session_set_save_handler();

<?php
//session 开始执行时最早执行的一个存储相关方法，用于初始化存储操作的相关资源
function ses_beg(){
// echo 'begin</br>';
 $link = mysql_connect('127.0.0.1','root','root');
 mysql_query('set names utf8');
 mysql_select_db('session_override');
}
//在session机制关闭时执行的方法，最后一个执行的存储相关操作，用于收尾
function ses_end(){
 echo 'end</br>';
 return true;
}
//不需要负责反序列化操作，在读取之后脚本自动执行
function ses_read($ses_id){
// echo 'read</br>';
 $sql = "select session_content from session where session_id = '$ses_id'";
 $res = mysql_query($sql);
 if($row = mysql_fetch_assoc($res)){
 return $row['session_content'];
 }else{
 return '';
 }
}
//不需要序列化操作，在写入之前脚本会自动执行
function ses_write($ses_id,$ses_con){
// echo 'write</br>';
// echo $ses_id,$ses_con;
 $sql = "replace into session values( '$ses_id' , '$ses_con',unix_timestamp() )";
 echo $sql.'</br>';
 return mysql_query($sql);
}
//当调用session_destroy()时执行
function ses_del($ses_id){
// echo 'del</br>';
 $sql = "delete from session where session_id = '$ses_id'";
 return mysql_query($sql);
}
//session.gc_maxlifetime = 1440
//在开启session机制的过程中，有概率地执行垃圾回收机制
//session.gc_probability = 1
//session.gc_divisor = 1000
//@param session.gc_maxlifetime
//return boolean
function ses_gc($maxlifetime){
// echo 'gc</br>';
 ini_set('session.gc_divisor',2);
 $sql = 'delete from session_override where last_time<unix_timestamp()-'.$maxlifetime;
 return mysql_query($sql);
}
//filesPHP内置的session存储处理器
//重写session机制，应该改为user用户自定义
ini_set('session.save_handler','user');
//配置存储机制要在start之前，要保证session不自动开启
//session.auto_start=0
//.htacess php_flag session.auto_start 0
session_set_save_handler('ses_beg','ses_end','ses_read','ses_write','ses_del','ses_gc');
session_start();
$_SESSION['id'] = 'test';
session_destroy();

session_set_params(3600)

ini_set('session.gc_maxlifetime','3600')

//是否仅仅使用cookie携带session-id
ini_set('session.use_only_cookies','0');
//是否自动采用其它方式自动传session-id，不安全
ini_set('session.use_trans_sid','1');