php登录实例代码
1 login.php
<?php
// $conn = mysql_connect("localhost", "root", "root") or die("Could not connect mysql!".msyql_error()."<br />");
// mysql_query("create database cookie_user") or die("Create database failed!".mysql_error()."<br />");
// mysql_select_db("cookie_user");
/* $sql = "create table user(
id int(10) not null auto_increment,
name varchar(50) default null,
password varchar(50) default null,
age int(5) default null,
primary key(id)
)engine=Innodb default charset=utf8";//注意不是utf-8
mysql_query($sql, $conn);
mysql_query("insert into user values(null, 'admin', md5('123456'), 11)");
mysql_query("insert into user values(null, 'user', md5('123456'), 11)");
mysql_query("insert into user values(null, 'hello', md5('123456'), 11)");
$result = mysql_query("select * from user");*/
// include dirname(__FILE__).'/com.php';
// include dirname(__FILE__).'/conn.php';
include 'com.php';
include 'conn.php';
// echo dirname(__FILE__);
if(isset($_POST['sub'])){
$name = $_POST['name'];
$password = md5($_POST['password']);
// echo $password;
// echo $name;
$sql = mysql_query("select * from user where name = '$name' and password = '$password' ");//注意后面的name一定要加''，否则无效
// $sql = mysql_query("select * from user");
// 打印sql查询结果
/* while($row = mysql_fetch_array($sql)){
print_r($row['name']."<br />");
} */
/* $row = mysql_fetch_array($sql);
print_r($row['name'].$row['password']); */
while($row = mysql_fetch_array($sql)){
$time = time() + 3600;
setCookie("username", $row['name'], $time);
setCookie("uid", $row['id'], $time);
setCookie("age", $row['age'], $time);
setCookie("isLogin", true, $time);
}
header("Location:index.php");
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>login.php</title>
</head>
<body>
<div>
<form action="" method="post"><!-- action中无参数则默认跳转到本页 -->
<table border="1" align="center">
<caption>User login</caption>
<tr>
<td>username</td>
<td><input type="text" name="name" /></td>
</tr>
<tr>
<td>password</td>
<td><input type="password" name="password" /></td>
</tr>
<tr>
<td colspan="1"></td>
<td><input type="submit" name="sub" value="submit" /></td>
</tr>
</table>
</form>
</div>
</body>
</html>
2 index.php
<?php
include com.php;
echo "User, ".$_COOKIE['username'].", welcome!";
echo "Your id is ".$_COOKIE['uid']."<br />";
echo "This is the first page.";
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>index.php</title>
</head>
<body>
<div>
<a href="secondPage.php">second page</a>
<a href="thirdPage.php">third page</a>
<a href="logout.php">logout</a>
</div>
</body>
</html>
3 com.php
<?php
if(!$_COOKIE['isLogin']){
header("Location:login.php");
echo "Please login first!";
}
4 conn.php
<?php
$conn = mysql_connect("localhost", "root", "root") or die("Could not connect mysql!".msyql_error()."<br />");
mysql_select_db("cookie_user");
?>
5 secondPage.php
<?php
include com.php;
echo "User, ".$_COOKIE['username'].", welcome!";
echo "Your id is ".$_COOKIE['uid']."<br />";
echo "This is the second page.";
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>index.php</title>
</head>
<body>
<div>
<a href="secondPage.php">second page</a>
<a href="thirdPage.php">third page</a>
<a href="logout.php">logout</a>
</div>
</body>
</html>
6 thirdPage.php
<?php
include com.php;
echo "User, ".$_COOKIE['username'].", welcome!";
echo "Your id is ".$_COOKIE['uid']."<br />";
echo "This is the third page.";
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>index.php</title>
</head>
<body>
<div>
<a href="secondPage.php">second page</a>
<a href="thirdPage.php">third page</a>
<a href="logout.php">logout</a>
</div>
</body>
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