PHP implements a method to set the automatic exit function for users who have not operated for 30 minutes based on cookies

$this->systemSetKey(array(‘name‘=>$admin_info[‘admin_name‘], ‘id‘=>$admin_info[‘admin_id‘],‘gid‘=>$admin_info[‘admin_gid‘],‘sp‘=>$admin_info[‘admin_is_super‘]));//登陆成功之后做得事情

/** * 系统后台 会员登录后 将会员验证内容写入对应cookie中 * * @param string $name 用户名 * @param int $id 用户ID * @return bool 布尔类型的返回结果 */ protected final function systemSetKey($user){ setNcCookie(‘sys_key‘,encrypt(serialize($user),MD5_KEY),3600,‘‘,null);//设置cookie 过期时间为30分钟。这边设置cookie框架有带自己加密规则，具体是否需要加密自己看着设置。 }

protected function __construct(){ Language::read(‘common,layout‘); /** * 验证用户是否登录 * $admin_info 管理员资料 name id */ $this->admin_info = $this->systemLogin();//取得管理员的资料，之后的子类控制器继承构造方法 if ($this->admin_info[‘id‘] != 1){ // 验证权限 $this->checkPermission(); } //转码 防止GBK下用ajax调用时传汉字数据出现乱码 if (($_GET[‘branch‘]!=‘‘ || $_GET[‘op‘]==‘ajax‘) && strtoupper(CHARSET) == ‘GBK‘){ $_GET = Language::getGBK($_GET); } } /** * 系统后台登录验证 * * @param * @return array 数组类型的返回结果 */ protected final function systemLogin(){ //取得cookie内容，解密，和系统匹配 $user = unserialize(decrypt(cookie(‘sys_key‘),MD5_KEY));//取cookie 里面储存的信息，现在使用的框架里面自定义了cookie的加密方式 if (!key_exists(‘gid‘,(array)$user) || !isset($user[‘sp‘]) || (empty($user[‘name‘]) || empty($user[‘id‘]))){ //假如不存在说明用户没登陆或者用户长时间未操作cookie时间过期 跳到登陆页面去 @header(‘Location: index.php?mod=login&action=login‘);exit; }else { $this->systemSetKey($user);//如果用户有登陆的话，每一个操作都会重写刷新cookie； } return $user; }

/** * 加密函数 * * @param string $txt 需要加密的字符串 * @param string $key 密钥 * @return string 返回加密结果 */ function encrypt($txt, $key = ‘‘){ if (empty($txt)) return $txt; if (empty($key)) $key = md5(MD5_KEY); $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_."; $ikey ="-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm"; $nh1 = rand(0,64); $nh2 = rand(0,64); $nh3 = rand(0,64); $ch1 = $chars{$nh1}; $ch2 = $chars{$nh2}; $ch3 = $chars{$nh3}; $nhnum = $nh1 + $nh2 + $nh3; $knum = 0;$i = 0; while(isset($key{$i})) $knum +=ord($key{$i++}); $mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum%8,$knum%8 + 16); $txt = base64_encode(time().‘_‘.$txt); $txt = str_replace(array(‘+‘,‘/‘,‘=‘),array(‘-‘,‘_‘,‘.‘),$txt); $tmp = ‘‘; $j=0;$k = 0; $tlen = strlen($txt); $klen = strlen($mdKey); for ($i=0; $i<$tlen; $i++) { $k = $k == $klen ? 0 : $k; $j = ($nhnum+strpos($chars,$txt{$i})+ord($mdKey{$k++}))%64; $tmp .= $chars{$j}; } $tmplen = strlen($tmp); $tmp = substr_replace($tmp,$ch3,$nh2 % ++$tmplen,0); $tmp = substr_replace($tmp,$ch2,$nh1 % ++$tmplen,0); $tmp = substr_replace($tmp,$ch1,$knum % ++$tmplen,0); return $tmp; }

/** * 解密函数 * * @param string $txt 需要解密的字符串 * @param string $key 密匙 * @return string 字符串类型的返回结果 */ function decrypt($txt, $key = ‘‘, $ttl = 0){ if (empty($txt)) return $txt; if (empty($key)) $key = md5(MD5_KEY); $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_."; $ikey ="-x6g6ZWm2G9g_vr0Bo.pOq3kRIxsZ6rm"; $knum = 0;$i = 0; $tlen = @strlen($txt); while(isset($key{$i})) $knum +=ord($key{$i++}); $ch1 = @$txt{$knum % $tlen}; $nh1 = strpos($chars,$ch1); $txt = @substr_replace($txt,‘‘,$knum % $tlen--,1); $ch2 = @$txt{$nh1 % $tlen}; $nh2 = @strpos($chars,$ch2); $txt = @substr_replace($txt,‘‘,$nh1 % $tlen--,1); $ch3 = @$txt{$nh2 % $tlen}; $nh3 = @strpos($chars,$ch3); $txt = @substr_replace($txt,‘‘,$nh2 % $tlen--,1); $nhnum = $nh1 + $nh2 + $nh3; $mdKey = substr(md5(md5(md5($key.$ch1).$ch2.$ikey).$ch3),$nhnum % 8,$knum % 8 + 16); $tmp = ‘‘; $j=0; $k = 0; $tlen = @strlen($txt); $klen = @strlen($mdKey); for ($i=0; $i<$tlen; $i++) { $k = $k == $klen ? 0 : $k; $j = strpos($chars,$txt{$i})-$nhnum - ord($mdKey{$k++}); while ($j<0) $j+=64; $tmp .= $chars{$j}; } $tmp = str_replace(array(‘-‘,‘_‘,‘.‘),array(‘+‘,‘/‘,‘=‘),$tmp); $tmp = trim(base64_decode($tmp)); if (preg_match("/\d{10}_/s",substr($tmp,0,11))){ if ($ttl > 0 && (time() - substr($tmp,0,11) > $ttl)){ $tmp = null; }else{ $tmp = substr($tmp,11); } } return $tmp; }