PHP Sort Array by Date

php-sort-date.php

<?php

header('content-type: text/plain');

//Creating Test Data
$event_listing 		= array();
$event_listing[] 	= array('event_name' => 'WordPress Meetup', 'event_date' => '2015-03-02');
$event_listing[] 	= array('event_name' => 'Dribbble Meetup', 'event_date' => '2014-09-23');
$event_listing[] 	= array('event_name' => 'Behance Meetup', 'event_date' => '2014-12-17');

//Creating UNIX Timestamp so we can apply sort and filter
$event_listing		= array_map(function($event)
{
	$event['timestamp'] 		= strtotime($event['event_date']);
	$event['event_date_display'] 	= date('D d M, Y', $event['timestamp']);
	return $event;
}, $event_listing);

//Remove past events
$today = mktime(0, 0, 0);
$event_listing 		= array_filter($event_listing, function($event) use($today)
{
	return ($event['timestamp'] >= $today);
});

//Get all dates so we can sort
$event_timestamps = array_map(function($event) { return $event['timestamp']; }, $event_listing);

array_multisort($event_timestamps, SORT_ASC, SORT_NUMERIC, $event_listing);

//Display Events now
foreach($event_listing as $event)
{
	echo $event['event_name'] . " on ". $event['event_date_display'] . PHP_EOL;
}