PHP ?? ??? ???? ??? ??
??? ??: ?? ?? HTML ??? ???????
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>歡迎登錄</title>
<style type="text/css">
*{margin: 0px;padding: 0px;}
body{background:#eee;}
#div{width:300px;height:400px;background:#B1FEF9;margin:0 auto;margin-top:150px;
border-radius:20px;}
h3{margin-left:48px;padding-top:60px;}
h4{margin-left:120px;padding-top:60px;font-size: 18px;}
#cnt{width:280px;height:370px;margin-left:33px;padding-top:60px;}
.sub{width:70px;height:30px;border:1px solid #fff;background:#eee;
margin-left:28px;margin-top:20px;}
.sub1{
width:70px;height:30px;border:1px solid #fff;background:#eee;margin-left:150px;margin-top:20px;}
</style>
</head>
<body>
<div id="div">
<h3>歡迎登陸后臺(tái)管理系統(tǒng)</h3>
<div id="cnt">
<form method="post" action="main.php">
用戶名：<input type="text" placeholder="請輸入用戶名" name="username">
<br><br>
密 碼：<input type="password" placeholder="請輸入密碼" name="password">
<br><br>
<input type="submit" value="登錄" class="sub">
</form>
</div>
</div>
</body>
</html>?? main.php? ???????. ?? main.php? ??? ?????.
??? ? ???? ? ???? ?? ?? ?? ??? ? ????? ???. ?? ?? ??? ???? ???.
?? ??? ??? ?? ?? ?? ??? ?????. ??
$name = $_POST['username'];
$pwd = md5($_POST['password'])$_SESSION['name']=$name;
$_SESSION['pwd'] =$pwd; ???? ??? ?? ??????? ?????. ??????? ???? ??? ??? ???? ??? ??? ??? ????? ???? ???. ???? ? ???? $sql = "????? *? ?????. ??? ??? ??='$name' ? ????='$pwd'"; $info = mysql_query($sql);
$row = mysql_fetch_row($info);
?? ?? $row? ????, ???? ?? ???? ??? ????. ???? ????? ???? ???? ????, ??? ??? ???? ???? ?? ??????
if($row){
echo "<script>alert( '??? ??');location.href='message .php';</script>"; }else{
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ?? ?? ? ? ? ? ? ? ? ? ?? ?? ?? ?? off ‐ ‐‐‐‐ ? ? echo "<script>alert('??? ??')</ script>""
? ? ???"<script>location.href='login.php';</script>"; //??? ??, ?? ???? ??
main.php ?? ??? ??? ????. ???:
<?php
session_start();
require_once('conn.php');
$name = $_POST['username'];
$pwd = md5($_POST['password']);
$_SESSION['name']=$name;
$_SESSION['pwd']=$pwd;
$sql = "select * from user where username='$name' and password='$pwd'";
$info = mysql_query($sql);
$row = mysql_fetch_row($info);
if($row){
echo "<script>alert('登錄成功');location.href='message.php';</script>";
}else{
echo "<script>alert('登錄失敗')</script>";
echo "<script>location.href='login.php';</script>"; //登錄失敗，跳轉(zhuǎn)到另外一個(gè)頁面
}
?>
