memcacheはPHPセッションを保存します

session.save_handler = memcache
session.save_path = "tcp://127.0.0.1:11211"

php_value session.save_handler "memcache"
php_value session.save_path  "tcp://127.0.0.1:11211"

ini_set("session.save_handler", "memcache");
ini_set("session.save_path", "tcp://127.0.0.1:11211");?

<?php
ini_set("session.save_handler", "memcache");
ini_set("session.save_path", "tcp://127.0.0.1:11211");
session_start();
if($_GET['a']){
 $_SESSION['joo'] = 'hello~';
}else{
 print_r($_SESSION);
}
$memcache_obj = new Memcache;
$memcache_obj->connect('127.0.0.1', 11211);
$var = $memcache_obj->get(session_id());
echo $var;
?>

Array ( [joo] => hello~ ) joo|s:6:"hello~";