教你快速实现PHP全站权限验证

PHP程序员在进行网站开发时，通常都会遇到与权限验证相关的问题。下面我们就为大家具体介绍有关PHP全站权限验证的实现方法。#t#

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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。

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