login.php
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<?php
session_start();
if
(isset(
$_POST
[
'user'
])) {
$user
=
$_POST
[
'user'
];
$password
=
$_POST
[
'password'
];
if
(
$user
==
'admin'
&&
$password
==
'Password'
) {
//验证正确
$_SESSION
[
'user'
] =
$user
;
//跳转到首页
header(
'location:index.php'
);
}
else
{
echo
"<script>alert('登录失败，用户名或密码不正确');</script>"
;
exit
();
}
}
?>
<form method=
"POST"
>
用户名: <input type=
"text"
name=
"user"
><br />
密码: <input type=
"text"
name=
"password"
><br />
<input type=
"submit"
value=
"提交"
>
</form>
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index.php
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<?php
session_start();
if
(isset(
$_SESSION
[
'user'
]) && !
empty
(
$_SESSION
[
'user'
])) {
echo
"登录成功："
.
$_SESSION
[
'user'
];
}
else
{
echo
"你还没有登录，<a href='login.php'>请登录</a>"
;
}
?>
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