简单的登录类，没有把登录和数据库查询分开 php /* * 例子 * * $auth=new auth(); * $auth->login(123@123.com,123); * $auth->logout(); * echo $r->init(); ***/
set($config); $this->pre_username=sha1(md5($this->pre.'username')); $this->pre_password=sha1(md5($this->pre.'password')); } public function set($config){ $this->cookie_time = isset($config['cookie_time'])?$config['cookie_time']: 7200; $this->cookie_where = isset($config['cookie_where'])?$config['cookie_where']:'/'; $this->cookie_domain = isset($config['cookie_domain'])?$config['cookie_domain']:''; $this->cookie_secure = isset($config['cookie_secure'])?$config['cookie_secure']:''; $this->select_uid = isset($config['select_uid'])?$config['select_uid']:'uid'; $this->select_table = isset($config['select_table'])?$config['select_table']:'table'; $this->select_usersname = isset($config['select_usersname'])?$config['select_usersname']:'user_name'; $this->select_password = isset($config['select_password'])?$config['select_password']:'password'; $this->salt = isset($config['salt'])?$config['salt']:'sghsdghsdg';// $this->guest_name = isset($config['guest_name'])?$config['guest_name']:'guest';// $this->pre = isset($config['auth'])?$config['auth']:'auth_'; $this->depr = isset($config['depr'])?$config['depr']:'-'; } // public function init(){ $this->user_id = 0; $this->username = $this->guest_name; $this->ok = false; if(!$this->check_session()){ $this->check_cookie(); } return $this->ok; } //验证session private function check_session(){ if(!empty($_session[$this->pre_username])&&!empty($_session[$this->pre_password])){ return $this->check($_session[$this->pre_username],$_session[$this->pre_password]); } else { return false; } } //验证cookie private function check_cookie(){ if(!empty($_cookie[$this->pre_username])&&!empty($_cookie[$this->pre_password])){ return $this->check($_cookie[$this->pre_username],$_cookie[$this->pre_password]); } else { return false; } } //登陆 public function login($username,$password){ $sql = select .$this->select_uid. from .$this->select_table. where .$this->select_usersname.='$username' and .$this->select_password.='$password'; $result = mysql_query($sql); $rows = mysql_num_rows($result); if($rows==1){ $this->user_id = mysql_result($result,0,0); $this->username = $username; $this->ok = true; $username = $username.$this->depr.$this->get_ip(); $user_name = $this->encrypt($username,'e',$this->salt); $_session[$this->pre_username]=$user_name; $_session[$this->pre_password]=md5(md5($password,$this->salt)); setcookie($this->pre_username,$user_name,time()+$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); setcookie($this->pre_password,md5(md5($password,$this->salt)),time()+$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); return true; } return false; } //验证 private function check($username,$password){ $user_name = $this->encrypt($username,'d',$this->salt); $name = explode($this->depr, $user_name); $username = $name[0]; $ip = isset($name[1]) ? $name[1] : null; if($ip !== $this->get_ip()) return false; static $vars = array(); if(!empty($vars)&&is_array($vars)&&isset($vars[$username.$password])){ $this->user_id = $vars['user_id']; $this->username = $vars['username']; $this->ok = $vars['ok']; return true; } $sql = select .$this->select_uid.,.$this->select_password. from .$this->select_table. where .$this->select_usersname.='$username'; $query = mysql_query($sql); $result = mysql_fetch_array($query); $row = mysql_num_rows($query); if($row == 1){ $db_password=$result[$this->select_password]; if(md5(md5($db_password,$this->salt)) == $password){ $this->user_id = $vars['user_id'] = $result[$this->select_uid]; $this->username = $vars['username'] = $username; $this->ok = $vars['ok'] = true; $vars[$username.$password] = md5($username.$password); return true; } } return false; } //退出 public function logout(){ $this->user_id = 0; $this->username = $this->guest_name; $this->ok = false; $_session[$this->pre_username]=; $_session[$this->pre_password]=; setcookie($this->pre_username,,time()-$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); setcookie($this->pre_password,,time()-$this->cookie_time,$this->cookie_where,$this->cookie_domain,$this->cookie_secure); } //加密 public function encrypt($string,$operation,$key='') { $key=md5($key); $key_length=strlen($key); $string=$operation=='d'?base64_decode($string):substr(md5($string.$key),0,8).$string; $string_length=strlen($string); $rndkey=$box=array(); $result=''; for($i=0;$i<=255;$i++) { $rndkey[$i]=ord($key[$i%$key_length]); $box[$i]=$i; } for($j=$i=0;$i<256;$i++) { $j=($j+$box[$i]+$rndkey[$i])%256; $tmp=$box[$i]; $box[$i]=$box[$j]; $box[$j]=$tmp; } for($a=$j=$i=0;$i