用户注册与登录完整代码.doc

用户注册与登录完整代码用户注册与登录完整代码login.html用户登录 htmlfont-size:12px; fieldsetwidth:520px; margin: 0 auto; legendfont-weight:bold; font-size:14px; labelfloat:left; width:70px; margin-left:10px; .leftmargin-left:80px; .inputwidth:150px; spancolor: #666666;用户登录用户名:密 码:conn.phpreg.php?phpif(!isset($_POSTsubmit) exit(非法访问!);$username = $_POSTusername;$password = $_POSTpassword;$email = $_POSTemail;/注册信息判断if(!preg_match(/wx80-xff3,15$/, $username) exit(错误：用户名不符合规定。返回);if(strlen($password) 6) exit(错误：密码长度不符合规定。返回);if(!preg_match(/w+(-+.w+)*w+(-.w+)*.w+(-.w+)*$/, $email) exit(错误：电子邮箱格式错误。返回);/包含数据库连接文件include(conn.php);/检测用户名是否已经存在$check_query = mysql_query(select uid from user where username=$username limit 1);if(mysql_fetch_array($check_query) echo 错误：用户名 ,$username, 已存在。返回; exit;/写入数据$password = MD5($password);$regdate = time();$sql = INSERT INTO user(username,password,email,regdate)VALUES($username,$password,$email,$regdate);if(mysql_query($sql,$conn) exit(用户注册成功！点击此处 登录); else echo 抱歉！添加数据失败：,mysql_error(),; echo 点击此处 返回 重试;?login.html用户登录 htmlfont-size:12px; fieldsetwidth:300px; margin: 0 auto; legendfont-weight:bold; font-size:14px; .labelfloat:left; width:70px; margin-left:10px; .leftmargin-left:80px; .inputwidth:150px; spancolor: #666666;用户登录用户名:密 码:login.php?phpsession_start();/注销登录if($_GETaction = logout) unset($_SESSIONuserid); unset($_SESSIONusername); echo 注销登录成功！点击此处 登录; exit;/登录if(!isset($_POSTsubmit) exit(非法访问!);$username = htmlspecialchars($_POSTusername);$password = MD5($_POSTpassword);/包含数据库连接文件include(conn.php);/检测用户名及密码是否正确$check_query = mysql_query(select uid from user where username=$username and password=$password limit 1);if($result = mysql_fetch_array($check_query) /登录成功 $_SESSIONusername = $username; $_SESSIONuserid = $resultuid; echo $username, 欢迎你！进入 用户中心; echo 点击此处 注销 登录！; exit; else exit(登录失败！点击此处 返回 重试);?my.php?phpsession_start();/检测是否登录，若没登录则转向登录界面if(!isset($_SESSIONuserid) header(Location:login.html); exit();/包含数据库连接文件include(conn.php);$userid = $_SESSIONuserid;$username = $_SESSIONusername;$user_query = mysql_query(select * from user where uid=$userid limit 1);$row = mysql_fetch_array($user_query);echo 用户信