In one of my forums was a discussion about, how to change an image randomly, so i wrote this code using mt_rand .... 

I hope you can use it .... 

<?php 
  //ImageChange.php 

  error_reporting(0);//hide the notice for the missing $iRand

  $sPath2ImageDir = Path;//preventing redundancy
  $aImages         = scandir($sBildOrdnerPfad);//Dir 2 Array
  $iImageCount     = count($aImages);//preventing redundancy
 
  while (getimagesize("{sPath2ImageDir}/{$aImages[$iRand]}")) {//recursion to get an image
    $iRand = mt_rand(2, $iImageCount-1);//min = 2 because $aImages[0] = "." and $aImages[1] = ".."
   
  echo "<img alt=\"Image{$iRand}\" src=\"{sPath2ImageDir}/{$aImages[$iRand]}\" title=\"Image{$iRand}\" />";//show the image

  unset($aImages, $iImageCount, $iRand, $sBildOrdnerPfad);//if this script is used in another script
?>
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