<?php
error_reporting(0);
 
$extensiones = array('jpg','jpeg','gif','png','bmp','draw','svg','wmf');
$directorio = './';
$imagen_de_salva = base64_decode(
"iVBORw0KGgoAAAANSUhEUgAAAAsAAAARCAYAAAAL4".
"VbbAAAAQUlEQVQokWP8//8/A7GAiWiVpCpmQRdgZG".
"SEu+v///+MWBUjKyLojP///zOim4RTMTFgVPEgVMw".
"IS8/40gYsGQAA4yQVHW/Zg08AAAAASUVORK5CYII=");
 
$DIR = dir($directorio);
while($RES = $DIR -> read()){
 if(filetype($RES) == 'file'){
  $EXT = explode('.',$RES);
  $EXT = $EXT[count($EXT)-1];
  foreach($extensiones as $VAL){
   if(strtolower($EXT) == strtolower($VAL)){
    $IMG[count($IMG)] = $RES;
	$EXTS[count($EXTS)] = $EXT;
   }
  }
 }
}
 
$VAR = rand(0,(count($IMG)-1));
if(!$EXTS[$VAR]){
 $EXTS[$VAR] = 'jpg';
}
 
header('Content-Type: image/'.$EXTS[$VAR]);
header('Cache-Control: no-store, no-cache');
header('Pragma: no-cache');
if(!$abrir = @fopen($directorio.$IMG[$VAR], 'r')){
 die($imagen_de_salva);
}else{
 echo fread($abrir, filesize($directorio.$IMG[$VAR]));
 fclose($abrir);
}
 
?>