<?php
session_set_cookie_params(0,'/','');
session_name('S');
session_save_path(dirname(__FILE__).'/session/');//保存session的目录，还目录要存在，并有读写权限
session_cache_limiter('private, must-revalidate');
session_start();

$_WEBPASSWORD="123";
$_POST['webPassword'] && $_SESSION['webPassword']=$_POST['webPassword'];

if($_SESSION['webPassword']!=$_WEBPASSWORD){
     print <<<EOT
<form action='' method='POST'>
请输入访问密码：<input name='webPassword'><input type='submit'>
</form>
     EOT;
exit;
}

?>