Selezionare file a seconda della data

[marketto]

$image_path="prova";
$image_data=array();
$handle = opendir($image_path);
while ($file = readdir($handle)) {
	if ($file != "." && $file != ".."){
		$temp=explode(".",$file);
		$temp="20".substr( $temp[0],4,2).substr( $temp[0],0,2).substr( $temp[0],2,2);
		if ($temp < date("Ymd"))
			$image_data[] = $file;
	}
}
closedir($handle);
print_r($image_data);