- var_dump: documentation ( source)
- date_default_timezone_set: documentation ( source)
<?php
date_default_timezone_set('America/New_York');
$ts = 1171502725;
$date = new DateTime("@$ts");
var_dump($date);
var_dump($date->format('H:i'));
$date = new DateTime;
$date->modify('@' . $ts);
var_dump($date);
var_dump($date->format('H:i'));
$date = new DateTime;
$date->setTimestamp($ts);
var_dump($date);
var_dump($date->format('H:i'));