教你快速实现PHP全站权限验证

PHP全站权限验证代码示例：

1. html>
2. head> title>e
3. /title>
4. /head>
5. body>
6. form action="login.php"
   method="POST" >

用户：

1. input type="text"
   name="username">
2. br>

密码：

1. input type="password"
   name="password">
2. input type ="Submit"
   value ="确定">
3. input type ="reset"
   value ="取消">
4. /form>
5. /body>
6. /html>

----------------conn.php--------------------------

1. ?php
2. $host='127.0.0.1';
3. $mysql_user='root';
4. $mysql_password='qeephp';
5. $mydb='learn';
6. $link = mysql_connect($host,
   $mysql_user , $mysql_password)
7. or die("无法连接数据库: "
   . mysql_error());
8. mysql_select_db($mydb);
9. ?>

----------------------------login.php------------------

 ?  

$username=$_POST['username'];  


$password=$_POST['password'];  


if ($username==""){  


echo " script language='javascript'> 
alert('非法操作!'); location.href=
'index.php';  /script>";  

exit;  
}  
require_once("conn.php");  

$sql="SELECT * FROM admin where
 username='$username'";  


$result=mysql_query($sql);  


$row=mysql_fetch_array($result);  

if ($row['username']==""){  

echo " script language='javascript'> 
alert('用户名有误!'); location.href=
'index.php';  /script>";  

exit;  
}else if ($row['password']!=$password){  

echo " script language='javascript'> 
alert('密码有误!'); location.href='index
.php';  /script>";  

echo "密码有误";  
exit;  
}else{  
session_start();  
$_SESSION['user']=$username;  

echo " script language='javascript'> 
alert('登陆成功!'); location.href=
'list.php';  /script>";  

}  

?> 

------------------check.php--------------------

 ?  
session_start();   
if(! isset($_SESSION['user']))   
{   

echo " script language='javascript'> 
alert('非法操作!'); location.href=
'index.php';  /script>";  

exit;  
}else{  
echo "欢迎".$_SESSION['user']
."登录系统";   
}  

?> 

---------------------list.php-----------------

 ?  
include 'check.php';  

?> 

 html> 
 head> 
 script type="text/javascript" 
src="player/swfobject.js"> /script> 
 /head> 
 body> 
 h3>单个文件播放: /h3> 
 p id="player1"> a href="
http://www.macromedia.com/go/
getflashplayer">获取播放器 /a> 观看电影 /p> 
 script type="text/javascript"> 

var s1 = new SWFObject("player/
flvplayer.swf","single","300","170","7");  

s1.addParam("allowfullscreen","true");  
s1.addVariable("file","player/ad.flv");  
s1.addVariable("image","player/preview.jpg");  
s1.addVariable("width","300");  
s1.addVariable("height","170");  
s1.write("player1");  
 /script> 
 h3>playlist file, with different 
colors: /h3> 
 p id="player2"> a href="http:
//www.macromedia.com/go/getflashplayer">
Get the Flash Player /a> to see this player. /p> 
 script type="text/javascript"> 

var s2 = new SWFObject("player/flvplayer
.swf","playlist","300","312","7");  

s2.addParam("allowfullscreen","true");  
s2.addVariable("file","player/playlist.xml");  
s2.addVariable("displayheight","200");  
s2.addVariable("backcolor","0x000000");  
s2.addVariable("frontcolor","0xCCCCCC");  
s2.addVariable("lightcolor","0x557722");  
s2.addVariable("width","300");  
s2.addVariable("height","312");  
s2.write("player2");  
 /script> 
 /body> 
 /html> 

--------------------logout.php-------------------------

 ?php   
unset($_SESSION['user']);   
unset($_SESSION['password']);   
echo "注销成功";   

?> 

以上就是PHP全站权限验证的具体实现方法。