跟着百度学PHP[14]-COOKIE的应用/网站登陆案例完整案例

先在数据库当中创建以下数据：

mysql> create table user(
-> id int not null auto_increment,
-> username varchar(50) not null default '',
-> password char(32) not null default '',
-> email varchar(80) not null default '',
-> allow_1 smallint not null default 0,
-> allow_2 smallint not null default 0,
-> allow_3 smallint not null default 0,
-> primary key(id));
mysql> insert into user(username,password,email,allow_1,allow_2,allow_3) values('admin',md5('admin'),'admin@admin.com',1,1,1);
Query OK, 1 row affected (0.18 sec)

mysql> insert into user(username,password,email,allow_1,allow_2,allow_3) values('shuaige',md5('shuaige'),'shuai@admin.com',0,1,1);
Query OK, 1 row affected (0.12 sec)

mysql> insert into user(username,password,email,allow_1,allow_2,allow_3) values('daniu',md5('daniu'),'daniu@admin.com',0,0,1);
Query OK, 1 row affected (0.14 sec)

allow_x中的一代表用户的权限，其值中的 1代表拥有权限，0代表没有权限。看一下结构。

mysql> select * from user;
+----+----------+----------------------------------+-----------------+---------+---------+---------+
| id | username | password                         | email           | allow_1 | allow_2 | allow_3 |
+----+----------+----------------------------------+-----------------+---------+---------+---------+
|  1 | admin    | 21232f297a57a5a743894a0e4a801fc3 | admin@admin.com |       1 |       1 |       1 |
|  2 | shuaige  | 37d2b9990df5a6843caf19352fee42a6 | shuai@admin.com |       0 |       1 |       1 |
|  3 | daniu    | 76720c5adee75ce9c7779500893fb648 | daniu@admin.com |       0 |       0 |       1 |
+----+----------+----------------------------------+-----------------+---------+---------+---------+
3 rows in set (0.00 sec)

然后我们写几个文件夹：

Index.php 首页

Cookie.php Cookie页面

Content.php 文章页面

Exit.php 离开页面

第一个Index.php

<?php
if (isset($_COOKIE["username"])) {//问以下是否设置了username
setcookie("id","",time()-3600,"/");
setcookie("username","",time()-3600,"/");
setcookie("password","",time()-3600,"/");
setcookie("allow_1","",time()-3600,"/");
setcookie("allow_2","",time()-3600,"/");
setcookie("allow_3","",time()-3600,"/");

echo "再见,亲爱的{$_COOKIE['username']}";
}
?>
<script>
setTimeout("location='index.php'",3000);
</script>

Exit.php