将session保留10秒改成session_start; 开启sessionifisset$_POSTpassword $password = $_POSTpassword; if$password == 19 判断是否已经跳转过 if!isset$_SESSIONisLogged $_SESSIONisLogged = t

<p>// 开启session
session_start();</p>
<p>if(isset($_POST['password'])) {
$password = $_POST['password'];
if($password == '19') {
// 判断是否已经跳转过
if(!isset($_SESSION['isLogged'])) {
$_SESSION['isLogged'] = true; // 标记已经跳转过
// 密码正确，跳转到主页
header('Location: vi.php');
exit;
}
} else {
// 密码错误，提示购买密码
echo '<script>alert(&quot;密码错误，请购买密码！&quot;);</script>';
// 2秒后跳转到购买链接
echo '<script>
setTimeout(function() {
window.location.href = &quot;http://wpa.qq.com/msgrd?v=3&amp;uin=1159114746&amp;site=qq&amp;menu=yes&quot;;
}, 2000);
</script>';
}
}</p>
<p>// 网站内容
echo ' _欢迎观看';</p>
<p>// 判断是否已经跳转过
if(!isset($_SESSION['isLogged'])) {
// 10秒后自动锁定
echo '<script>
setTimeout(function() {
document.body.innerHTML = &quot;&lt;form method=&quot;post&quot;&gt;&lt;input type=&quot;password&quot; name=&quot;password&quot; placeholder=&quot;请输入密码&quot;&gt;</form>&quot;;
}, 10000);
</script>';
// 锁定后重新开启session，防止未登录时访问页面
session_destroy();
session_start();
}</p>