两组PHP代码的随机图像显示程序

1:PHP随机显示图片

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<?php
/*
*   Author:   http://www.yox.net.ru
*/


$url = "./images"; //注意:图片文件夹路径,不可含有'/';
$files = array();
if(false !== ($handle = @opendir($url)))
{
  while($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)); //设定随机数的范围;

//根据文件类型,设置输出的文件类型;
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("$url/$files[$random]"); //读文件,显示图片;
}else
  echo "<b>图片目录<font color=red>$url</font>不存在!请重新设置!</b>";
?>

2:PHP随机图片
创建名为1到15的gif图片,随机调用显示.(注意,文件名为1.gif到15.gif之间)
可用于论坛头像,嘿嘿…

1
<?readfile(rand(1,15).".gif");?>

收藏自:http://www.yox.net.ru/random_pic_bbs/