- var_dump: documentation ( source)
- date_create: documentation ( source)
<?php
$start = 1420467000;
$end = 1420469400;
$realm = 'dplaydk';
$params = array(
'start' => date_create("@$start"),
'end' => date_create("@$end"),
'realm' => $realm,
);
var_dump($params - ['end']);