session_start();
     
$_SESSION['name'] = 'webyang.net';
$_SESSION['sex'] = 'male';

//session编码
$webyang = session_encode();

echo $webyang;//name|s:11:"webyang.net";sex|s:4:"male";     
echo '<br/>';
     
//session解码
session_decode($webyang);
echo $_SESSION['name']."-".$_SESSION['sex'];