Sorting multidimensional array

ticketsSort.php

<?php

// Nested array to sort
$data = array(
		'Guy' => array(
				array('id' => 1, 'title' => 'This'),
				array('id' => 7, 'title' => 'Boo'),
				array('id' => 9, 'title' => 'Boo'),
				array('id' => 3, 'title' => 'Broken'),
			),
		'Girl' => array(
				array('id' => 2, 'title' => 'Down'),
				array('id' => 8, 'title' => 'Service'),
				array('id' => 4, 'title' => 'Protocol'),
			),
	);

/**
 * Sort tickets by title ASC and id DESC
 */
function ticketsSort($a, $b) {
	
	if ($a['title'] == $b['title']) {
		
		if ($a['id'] == $b['id']) {
			return 0;
		}
		
		// DESC 
		return ($a['id'] > $b['id']) ? -1 : 1;
	}
	
	// ASC
	return ($a['title'] > $b['title']) ? 1 : -1;
}

// If you don't like array_walk and stuff :)
foreach ($data as $person => $tickets) {
	usort($tickets, 'ticketsSort');
	$data[$person] = $tickets;
}

print_r($data);
?>