img.php

<?php 
/********************************************** 
* Filename : img.php 
* Author : freemouse 
* Date : 2010/12/27 
* Usage: 
* <img src=img.php> 
* <img src=img.php?folder=images2/> 
***********************************************/ 
if($_GET['folder']){ 
$folder=$_GET['folder']; 
}else{ 
$folder='pic/'; 
} 
//存放图片文件的位置 
$path = $_SERVER['DOCUMENT_ROOT']."/fudaola/".$folder; 
$files=array(); 
if ($handle=opendir("$path")) { 
while(false !== ($file = readdir($handle))) { 
if ($file != "." && $file != "..") { 
if(substr($file,-3)=='gif' || substr($file,-3)=='jpg' || substr($file,-3)=='png') $files[count($files)] = $file; 
} 
} 
} 
closedir($handle); 

$random=rand(0,count($files)-1); 
if(substr($files[$random],-3)=='gif') header("Content-type: image/gif"); 
elseif(substr($files[$random],-3)=='jpg') header("Content-type: image/jpeg"); 
elseif(substr($files[$random],-3)=='png') header("Content-type: image/png"); 
readfile("$path/$files[$random]"); 
echo $path;
?>