lol Re-randomize the function code for randomly displaying pictures in php

For example, the display window of the blog

Copy the code The code is as follows:

/**********************************************
* Filename : img.php
* Author : freemouse
* web : www.cnphp.info
* email :freemouse1981@gmail.com
* Date : 2010/12/27
* Usage:
*
*
***********************************************/
if($_GET['folder']){
$folder=$_GET ['folder'];
}else{
$folder='/images/';
}
//The location where image files are stored
$path = $_SERVER['DOCUMENT_ROOT']."/".$folder;
$files=array();
if ($handle=opendir("$path")) {
while(false !== ($file = readdir($handle))) {
if ($file != ". " && $file != "..") {
if(substr($file,-3)=='gif' || substr($file,-3)=='jpg') $files[count($ 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");
readfile("$path/$files[$random]");
?>

The above introduces the function code of lol re-randomization in PHP to randomly display pictures, including the content of lol re-randomization. I hope it will be helpful to friends who are interested in PHP tutorials.