Mine

<?php
function cmp($a, $b) 
{	
	return strcmp(preg_replace('/^.*\//','',$a), preg_replace('/^.*\//','',$b));
}
$cmd = "find -L ".$DOCUMENT_ROOT."-type f | sed -e 's/\.\///' | grep -i -e \"\.\(avi\|mkv\|ogm\|mov\|mpg\|rmvb\|mp4\)\$\"";
echo $cmd."<br />";
exec($cmd,$fileList);
usort($fileList,"cmd");
foreach ($fileList as $value) {
	echo "$value<br />\n";
}
?>