教你快速实现PHP全站权限验证_PHP教程

 
 ? 
 
 $username=$_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>";  
 
} 
 
 ?>  
 

 
 ? 
 
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"; 
 
} 
 
 ?>  
 

 
 ? 
 
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> 
 

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