Randomizes image file names in current directory for use w/ digital frames that don't support shuffle.

randomfile.php

<?php
/* 
  randomfile.php
    A quickie script that will take all images in
    current directory, back them up to ./Orig and 
    rename all files in parent directory w/ random
    numbers.  
    
  Written: 12/27/2010 - Nicholas Kreidberg
  Revised: 12/27/2010 - Nicholas Kreidberg
*/

$dir = "./";
$bu = "Orig/";
$atypes = array("jpg", "gif", "png");

if(is_dir($dir))
{
  if($dh = opendir($dir))
  {
    $i = 0;
    
    if(!is_dir($dir.$bu))
      mkdir($dir.$bu);
    while(($file = readdir($dh)))
    {
      if(is_file($file) && (in_array(pathinfo($file, PATHINFO_EXTENSION), $atypes)))
      {
        echo "Filename: $file backed-up and renamed.\n";
        copy($file, $dir.$bu.$file);
        $newfile = rand(1, 99999999).'.'.pathinfo($file, PATHINFO_EXTENSION);
        rename($file, $newfile);
        $i++;
      }
    }
    closedir($dh);
    echo "$i files processed.\n\n";
  }
}
?>