1.新建三个html文件，两个php文件和若干个CSS文件和若干个JS文件

2.登录的html页面显示效果图

3.注册的页面的显示效果图

4.登录页面的form表单代码

5.注册页面的form表单代码

6.login.php代码

header("Content-type: text/html; charset=utf-8");

$username = $_POST['username'];

$password = $_POST['password'];

$conn = new mysqli('localhost','root','root','shopping');

if ($conn->connect_error){

echo '数据库连接失败！';

exit(0);

}else{

if ($username == ''){

echo '';

exit(0);

}

if ($password == ''){

echo '';

exit(0);

}

$sql = "select username,password from userinfo where username = '$_POST[username]' and password = '$_POST[password]'";

$result = $conn->query($sql);

$number = mysqli_num_rows($result);

if ($number) {

echo '';

} else {

echo '';

}

}

?>

7.regist.php代码

header("Content-type: text/html; charset=utf-8");

$username = $_POST['username'];

$password = $_POST['password'];

$repassword = $_POST['repassword'];

$telphone = $_POST['telphone'];

if ($username == ''){

echo '';

exit(0);

}

if ($password == ''){

echo '';

exit(0);

}

if ($password != $repassword){

echo '';

exit(0);

}

if($password == $repassword){

$conn = new mysqli('localhost','root','root','shopping');

if ($conn->connect_error){

echo '数据库连接失败！';

exit(0);

}else {

$sql = "select username from userinfo where username = '$_POST[username]'";

$result = $conn->query($sql);

$number = mysqli_num_rows($result);

if ($number) {

echo '';

} else {

$sql_insert = "insert into userinfo (username,password,telphone) values('$_POST[username]','$_POST[password]','$_POST[telphone]')";

$res_insert = $conn->query($sql_insert);

if ($res_insert) {

echo '';

} else {

echo "";

}

}

}

}else{

echo "";

}

?>

8.进入首页后的图片

9.数据库的图片

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