sortiranje slik po datumu posnetka

<?php
$slike = Array();
$i = 0;
function preberi_mapo($mapa) {

global $i, $slike;

if ($handle = opendir($mapa)) {
   echo "Mapa: $mapa<br />\n";
   while (false !== ($file = readdir($handle))) 
   {
		if ($file != "." AND $file != "..")
		{	
			echo "Berem $file ...<br />\n";
			if (is_dir($mapa.'\\'.$file))
			{
				preberi_mapo($mapa.'\\'.$file);
			}
			else
			{
				if(@$exif = exif_read_data($mapa.'\\'.$file))
				{
					echo "Datum: $exif[DateTime]<br />\n";
					if (array_key_exists($exif['DateTime'], $slike)) {
						echo "<span style='color: green'>$mapa\\$file isti cas kot ". $slike[$exif['DateTime']]."</span><br />\n";
					}
					$slike[$exif['DateTime']] = $mapa.'\\'.$file;
					$i++;
				}
				else
				{
					echo "<span style='color: red'>Ni exif podatkov</span><br />\n";
				}
				
			}
		}
   }
   closedir($handle);
}
}
preberi_mapo('C:\Documents and Settings\Administrator\My Documents\My Pictures\speyer'); //tukaj je  mapa, kjer so slike
echo "Slik: $i<br />\n";
$j = 0;
foreach ($slike as $key => $val) {
   echo "kopiram $val v C:\Documents and Settings\Administrator\My Documents\My Pictures\speyer\\timeline\Slika$j.jpg<br />\n";
   copy($val, "C:\Documents and Settings\Administrator\My Documents\My Pictures\speyer\\timeline\Slika$j.jpg"); //v to mapo se pa skopira
   $j++;
}
?>