<?php?
??? if(isset($_POST['name'])||isset($_POST['pass'])){?
??????? //如果有表單有提交?
??????? //檢測表單中需要的值?
??????? if(empty($_POST['name'])){?
??????????? die("請輸入用戶名!");?
??????? }?
??????? if(empty($_POST['pass'])){?
??????????? die("請輸入暗碼!");?
??????? }?
??????? //設置數(shù)據(jù)庫變量?
??????? $host = "localhost";?
??????? $user = "root";?
??????? $pass = "zq19890319";?
??????? $db = "cookie";?
??????? //打開連接?
??????? $connection = mysql_connect($host, $user, $pass) or die("Unable to connect!");?
??????? //選擇一個數(shù)據(jù)庫?
??????? mysql_select_db($db) or die("Unable to select database!");?
??????? //建立一個查詢?
??????? $query = "SELECT * FROM users WHERE name = '".$_POST['name']."' AND pass = SHA1('".$_POST['pass']."')";?
??????? //執(zhí)行一個查詢?
??????? $result = mysql_query($query) or die("Error in query:$query." . mysql_error());?
??????? //是否有記錄集返回?
??????? if(mysql_num_rows($result) == 1){?
??????????? //如果有一行記錄返回?
??????????? //表示驗證已經(jīng)通過?
??????????? //建立一個session,設置一個登陸標記為1,并將當前用戶名保存在cookie中?
??????????? session_start();?
??????????? $_SESSION['auth'] = 1;?
??????????? setcookie("username", $_POST['name'], time()+(84600*30));?
??????????? echo "用戶訪問已經(jīng)授權!";?
??????? }else{?
??????????? echo "錯誤的用戶名或暗碼!";?
??????? }?
??????? //釋放記錄集?
??????? mysql_free_result($result);?
??????? //關閉數(shù)據(jù)庫?
??????? mysql_close($connection);?
??? }?
??? else{?
??????? //如果沒有表單提交,則顯示一個HTML表單?
??? ?>?
??? <html>?
??? <head></head>?
??? <body>?
??????? <center>?
??????????? <form method="post" action="">?
??????????? 用戶名<input type="text" name="name" value="<?php echo $_COOKIE['username'];?>" />?
??????????? <p />?
??????????? 暗碼<input type="password" name="password" />?
??????????? <p />?
??????????? <input type="submit" name="submit" value="登陸" />?
??????????? </form>?
??????? </center>?
??? </body>?
<?php?
??? }?
?>
