PHP Cookie login verification techniques explained_PHP tutorial

The purpose of building a website is functional integrity. One of the functions is the implementation of user login verification. Below we will introduce to you in detail the

PHP Cookie login verification code example:

1. < html> 
2. < head> 
3. < title>Login< /title> 
4. < meta http-equiv="Content-Type" 
   content="text/html; charset=gb2312"> 
5. < /head> 
6. < body> 
7. < form name="form1" method="post" 
   action="login.php"> 
8. < table width="300" border="0" align="center" 
   cellpadding="2" cellspacing="2"> 
9. < tr> 
10. < td width="150">< div align="right">
    用户名：< /div>< /td> 
11. < td width="150">< input type="text" 
    name="username">< /td> 
12. < /tr> 
13. < tr> 
14. < td>< div align="right">密码：< /div>< /td> 
15. < td>< input type="password" name="passcode">< /td> 
16. < /tr> 
17. < tr> 
18. < td>< div align="right">Cookie保存时间：< /div>< /td> 
19. < td>< select name="cookie" id="cookie"> 
20. < option value="0" selected>浏览器进程< /option> 
21. < option value="1">保存1天< /option> 
22. < option value="2">保存30天< /option> 
23. < option value="3">保存365天< /option> 
24. < /select>< /td> 
25. < /tr> 
26. < /table> 
27. < p align="center"> 
28. < input type="submit" name="Submit" value="Submit"> 
29. < input type="reset" name="Reset" value="Reset"> 
30. < /p> 
31. < /form> 
32. < /body> 
33. < /html>  

<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php  </span></span></li><li><span>@mysql_connect("localhost", "root","1981427")<br /> //选择数据库之前需要先连接数据库服务器  </span></li><li class="alt"><span>or die("数据库服务器连接失败");  </span></li><li><span>@mysql_select_db("test") //选择数据库mydb  </span></li><li class="alt"><span>or die("数据库不存在或不可用");  </span></li><li><span>//获取用户输入  </span></li><li class="alt"><span>$</span><span class="attribute">username</span><span> = $_POST['username'];  </span></li><li><span>$</span><span class="attribute">passcode</span><span> = $_POST['passcode'];  </span></li><li class="alt"><span>$</span><span class="attribute">cookie</span><span> = $_POST['cookie'];  </span></li><li><span>//执行SQL语句  </span></li><li class="alt"><span>$</span><span class="attribute">query</span><span> = @mysql_query("select username, <br />userflag from users "  </span></li><li><span>."where </span><span class="attribute">username</span><span> = </span><span class="attribute-value">'$username'</span><span> and <br /></span><span class="attribute">passcode</span><span> = </span><span class="attribute-value">'$passcode'</span><span>")  </span></li><li class="alt"><span>or die("SQL语句执行失败");  </span></li><li><span>//判断用户是否存在，密码是否正确  </span></li><li class="alt"><span>if($</span><span class="attribute">row</span><span> = </span><span class="attribute-value">mysql_fetch_array</span><span>($query))  </span></li><li><span>{  </span></li><li class="alt"><span>if($row['userflag'] == 1 or $row['userflag'] == 0) <br />//判断用户权限信息是否有效  </span></li><li><span>{  </span></li><li class="alt"><span>switch($cookie) //根据用户的选择设置cookie保存时间  </span></li><li><span>{  </span></li><li class="alt"><span>case 0: //保存Cookie为浏览器进程  </span></li><li><span>setcookie("username", $row['username']);  </span></li><li class="alt"><span>break;  </span></li><li><span>case 1: //保存1天  </span></li><li class="alt"><span>setcookie("username", $row['username'],<br /> time()+24*60*60);  </span></li><li><span>break;  </span></li><li class="alt"><span>case 2: //保存30天  </span></li><li><span>setcookie("username", $row['username'],<br /> time()+30*24*60*60);  </span></li><li class="alt"><span>break;  </span></li><li><span>case 3: //保存365天  </span></li><li class="alt"><span>setcookie("username", $row['username'], <br />time()+365*24*60*60);  </span></li><li><span>break;  </span></li><li class="alt"><span>}  </span></li><li><span>header("location: main.php"); <br />//自动跳转到main.php  </span></li><li class="alt"><span>}  </span></li><li><span>else  </span></li><li class="alt"><span>{  </span></li><li><span>echo "用户权限信息不正确";  </span></li><li class="alt"><span>}  </span></li><li><span>}  </span></li><li class="alt"><span>else  </span></li><li><span>{  </span></li><li class="alt"><span>echo "用户名或密码错误";  </span></li><li><span>}  </span></li><li class="alt"><span class="tag">?></span><span> </span></span></li></ol>

PHP Cookie登录验证代码实例：

 

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><</span><span> ?php  </span></span></li><li><span>session_start();  </span></li><li class="alt"><span>if(isset($_COOKIE['username']))  </span></li><li><span>{  </span></li><li class="alt"><span>@mysql_connect("localhost", "root","1981427") </span></li><li class="alt"><span>//选择数据库之前需要先连接数据库服务器  </span></li><li><span>or die("数据库服务器连接失败");  </span></li><li class="alt"><span>@mysql_select_db("test") //选择数据库mydb  </span></li><li><span>or die("数据库不存在或不可用");  </span></li><li class="alt"><span>//获取Session  </span></li><li><span>$</span><span class="attribute">username</span><span> = $_COOKIE['username'];  </span></li><li class="alt"><span>//执行SQL语句获得userflag的值  </span></li><li><span>$</span><span class="attribute">query</span><span> = @mysql_query("select <br />userflag from users "  </span></li><li class="alt"><span>."where </span><span class="attribute">username</span><span> = </span><span class="attribute-value">'$username'</span><span>")  </span></li><li><span>or die("SQL语句执行失败");  </span></li><li class="alt"><span>$</span><span class="attribute">row</span><span> = </span><span class="attribute-value">mysql_fetch_array</span><span>($query);  </span></li><li><span>//获得用户权限信息  </span></li><li class="alt"><span>$</span><span class="attribute">flag</span><span> = $row['userflag'];  </span></li><li><span>//根据userflag的值输出不同的欢迎信息  </span></li><li class="alt"><span>if($</span><span class="attribute">flag</span><span> == 1)  </span></li><li><span>echo "欢迎管理员".$_SESSION['username']<br />."登录系统";  </span></li><li class="alt"><span>if($</span><span class="attribute">flag</span><span> == 0)  </span></li><li><span>echo "欢迎用户".$_SESSION['username']<br />."登录系统";  </span></li><li class="alt"><span>echo "</span><span class="tag"><</span><span> </span><span class="tag-name">a</span><span> </span><span class="attribute">href</span><span>=</span><span class="attribute-value">"logout.php"</span><span> <br /></span><span class="attribute">href</span><span>=</span><span class="attribute-value">"logout.php"</span><span class="tag">></span><span>注销</span><span class="tag"><</span><span> /a</span><span class="tag">></span><span>";  </span></span></li>
<li><span>}  </span></li>
<li class="alt"><span>else  </span></li>
<li><span>{  </span></li>
<li class="alt"><span>echo "您没有权限访问本页面";  </span></li>
<li><span>}  </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
<li>
<span class="tag"><</span><span> ?php  </span></li><li class="alt"><span>setcookie("username");  </span></li><li><span>echo "注销成功";  </span></li><li class="alt"><span class="tag">?></span><span> </span>
</li>
</ol>

以上及时PHP Cookie登录验证的实现方法。

http://www.bkjia.com/PHPjc/445946.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/445946.htmlTechArticle一个网站的建设目的就是功能的完整性。其中有一个功能就是用户登录验证的实现。下面我们就向大家详细介绍有关 PHP Cookie登录验证代码...