Home php教程 php手册 php中存储用户ID和密码到mysql数据库的方法

php中存储用户ID和密码到mysql数据库的方法

Jun 13, 2016 am 11:55 AM
create mysql php code information create and copy storage password database method user of surface

创建用户信息表:

复制代码 代码如下:


CREATE TABLE tbl_auth_user (
user_id VARCHAR(10) NOT NULL,
user_password CHAR(32) NOT NULL,
PRIMARY KEY (user_id)
);
INSERT INTO tbl_auth_user (user_id, user_password) VALUES ('theadmin', PASSWORD('chumbawamba'));
INSERT INTO tbl_auth_user (user_id, user_password) VALUES ('webmaster', PASSWORD('webmistress'));


我们将使用相同的html代码来创建登录表单在上述示例中创建的。我们只需要修改登录过程有点。
登录脚本:

复制代码 代码如下:


// 我们必须永远不会忘记启动会话
session_start();
$errorMessage = '';
if (isset($_POST['txtUserId']) && isset($_POST['txtPassword'])) {
   include 'library/config.php';
   include 'library/opendb.php';
   $userId = $_POST['txtUserId'];
   $password = $_POST['txtPassword'];
   // 检查用户id和密码组合存在于数据库
   $sql = "SELECT user_id
           FROM tbl_auth_user
           WHERE user_id = '$userId'
                 AND user_password = PASSWORD('$password')";
   $result = mysql_query($sql)
             or die('Query failed. ' . mysql_error());
   if (mysql_num_rows($result) == 1) {
      // sessionthe设置用户id和密码匹配,
      // 设置会话
      $_SESSION['db_is_logged_in'] = true;
      // 在登录后我们转到主页
      header('Location: main.php');
      exit;
   } else {
      $errorMessage = 'Sorry, wrong user id / password';
   }
   include 'library/closedb.php';
}
?>


/ /…相同的html登录表单前一个示例一样

而不是检查用户id和密码对硬编码的信息我们查询数据库,如果这两个存在于数据库使用SELECT查询。如果我们发现一个匹配我们设置会话变量和移动到主页。注意,会话的名字是前缀 “db”使它不同于先前的示例。

在接下来的两个脚本(主要。php和注销。php)代码类似于前一个。唯一的区别是会话名称。这是为这两个的代码

复制代码 代码如下:


session_start();
//是一个访问这个页面登录呢?
if (!isset($_SESSION['db_is_logged_in'])
   || $_SESSION['db_is_logged_in'] !== true) {
   // 没有登录,返回到登录页面
   header('Location: login.php');
   exit;
}
?>


/ /…这里的一些html代码

复制代码 代码如下:


session_start();
// 如果用户已登录,设置会话
if (isset($_SESSION['db_is_logged_in'])) {
   unset($_SESSION['db_is_logged_in']);
}
// 现在,用户登录,
// 去登录页面
header('Location: login.php');
?>

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