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php session 使用详细实例代码

Jun 13, 2016 am 10:00 AM
php re session start code use Example detailed

session_start(), session_register(),session_unregister(),
session_is_registered(),session_destroy函数.
session_start():启用session机制,在需要用到session的程序文件的最开始调用它.
session_register():注册session变量
session_unregister(): 删除session变量(一个一个删除)
session_is_registered(): 判断session变量是否注册
session_distroy(): 销毁所有session变量(所有session变量销毁)

初始化session
实例1
*/
session_start();
//删除所有的session变量值
$_session=array();
if(isset($_cookie[session_name()]))
{
  setcookie(session_name(),'',time()-42000,'/');
}
//注销所有的session
session_destroy();

/*
实例2
*/

session_start();             //初始化session
$a=5;              //定义变量
session_register('a');            //注册session
session_decode("");  //解密字符串
print (session_is_registered('a')?$_session[a]:'not registered' );     //判断变量是否注册


/*
实例3
*/

/*初始化session*/
session_start();
$_session['login_ok']=true;        //定义session值
$_session['nome']='sica';        //定义session值
$_session['inteiro']=34;         //定义session值
$result=session_encode();        //对session值加密
echo $result;           //输出结果
session_destroy();          //注销所有session值

/*
实例4
*/

session_start();         //初始化session
$_session['name']="yoursession";     //注册一个session变量
if(!isset($_session['initiated']))     //如果某个值没有被设定
{
  session_regenerate_id();      //获取当前的session id
  $_session['initiated']=true;      //设定值为真
}
session_destroy();        //注销session

//实例5

session_start();         //初始化session
$_session['name']="yoursession";     //注册一个session变量
if(session_is_registered(name))     //进行判断
{
  echo "指定的变量已经被注册为session
";  //输出内容
}
else
{
  echo "指定的变量没有被注册为session
";  //输出相应结果
}
session_destroy();        //注销session
?>

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