- var_dump: documentation ( source)
- date_default_timezone_set: documentation ( source)
<?php
$lead = array('date_created' => '2014-05-05 12:30:30');
date_default_timezone_set('Europe/Stockholm');
// The source timezone
$sourceTimezone = new DateTimeZone('UTC');
// The target timezone
$targetTimezone = new DateTimeZone('Europe/London');
$date = DateTime::createFromFormat('Y-m-d H:i:s', $lead['date_created'], $sourceTimezone);
$date->add(new DateInterval('P2H'));
$date->setTimezone($targetTimezone);
var_dump($date);
var_dump($date->format('Y-m-d H:i'));