Sort files from directory & order them by filemtime()

function Sort_Directory_Files_By_Last_Modified($dir, $sort_type = 'descending', $date_format = "F d Y H:i:s.")
{
$files = scandir($dir);
 
$array = array();
 
foreach($files as $file)
{
	if($file != '.' && $file != '..')
	{
		$now = time();
		$last_modified = filemtime($dir.$file);
 
		$time_passed_array = array();
 
		$diff = $now - $last_modified;
 
		$days = floor($diff / (3600 * 24));
 
		if($days)
		{
		$time_passed_array['days'] = $days;
		}
 
		$diff = $diff - ($days * 3600 * 24);
 
		$hours = floor($diff / 3600);
 
		if($hours)
		{
		$time_passed_array['hours'] = $hours;
		}
 
		$diff = $diff - (3600 * $hours);
 
		$minutes = floor($diff / 60);
 
		if($minutes)
		{
		$time_passed_array['minutes'] = $minutes;
		}
 
		$seconds = $diff - ($minutes * 60);
 
		$time_passed_array['seconds'] = $seconds;
 
	$array[] = array('file'         => $file,
		             'timestamp'    => $last_modified,
		             'date'         => date ($date_format, $last_modified),
		             'time_passed'  => $time_passed_array);
	}
}
 
usort($array, create_function('$a, $b', 'return strcmp($a["timestamp"], $b["timestamp"]);'));
 
if($sort_type == 'descending')
{
krsort($array);
}
 
return array($array, $sort_type);
}
 
//Example of usage:
 
$dir  = '/home/public_html/my_directory/';
 
$array = Sort_Directory_Files_By_Last_Modified($dir);
 
// Info Array
$info = $array[0];
 
// Sort Type
$sort_type = $array[1];
 
echo '<h3>'.$dir.'</h3>';
 
echo 'Order by: Last Modified ('.$sort_type.')<br>';
 
foreach($info as $key => $detail)
{
	echo '<h4>'.$detail['file'].'</h4>';
 
	echo 'Last Modified: '.$detail['date'].'<br>';
 
	$time_passed = '';
 
	foreach($detail['time_passed'] as $type => $value)
	{
	$time_passed .= $value." ".$type.", ";
	}
 
	$time_passed = "<span>".rtrim($time_passed, ", ")."</span> ago";
 
	echo $time_passed."nn";
 
}