php2

session_start();    //开始使用session
$_SESSION[‘test‘] = time();            //设置一个session
echo "session_id:".session_id();      //显示当前的session_id
echo "<br>";

echo $_SESSION[‘test‘];              //输出session值

unset($_SESSION[‘test‘]);          //销毁一个session
echo "<br>";
var_dump($_SESSION);

//session_id:lpd56n5qsmga006v3ss300sgf4
//1518599397
//array(0) {
//}

setcookie(‘test‘, ‘1‘, 0, ‘/‘);  //name, value, expire, path
echo $_COOKIE[‘test‘];

//1


setcookie(‘test‘, ‘‘, time()-1)   //删除cookie(删除test的cookie值)