/**
* special helper method:
* showCaptcha() returns an image, so we can use it in img tags in the views, like
* <img src="......./login/showCaptcha" />
*/
function showCaptcha()
{
$captcha = new Captcha();
// generate new string with captcha characters and write them into $_SESSION['captcha']
$captcha->generateCaptcha();
// render a img showing the characters (=the captcha)
$captcha->showCaptcha();
}
//设置cookie 记住用户id即可,把信息存放到浏览器
setcookie('user_id', $user['a_id'], time() + 7 * 24 * 3600);
}
//没有勾选不操作
//更新用户信息
$admin->updateLoginInfo($user['a_id']);
//sueecess,go to homepage 验证成功 进入首页
admin_redirect('index.php', '登录成功', 1);
} else {
//false 验证失败
admin_redirect('privilege.php', '帐号或密码错误');
}
} elseif ($act == 'logout') {
//logout用户退出
//destroy or empty session
session_destroy();
//清除cookie
if (isset($_COOKIE['user_id'])) {
//设置cookie有效期1,表示70年过期,0表示关闭浏览器过期
setcookie('user_id', '', 1);
}
//go to login.php
admin_redirect('privilege.php?act=login', '退出成功');
} elseif ($act == 'captcha') {
//用户想要获取验证码图片
$captcha = new Captcha();
//告知浏览器作为图片处理
header('Content-type:image/png');
//生成验证码图片
$captcha->generateCaptcha();
}
