<?php

class DateTimeTest
{
    /**
     * configured timezone
     * @var DateTimeZone
     */
    static private $timezone;

    public function __construct()
    {
        if (!self::$timezone) {
            self::$timezone =   new DateTimeZone('Europe/Berlin');
        }
    }
    
    public function run()
    {
        $value  =   '2009-07-15 00:53:00';
        $date   =   new DateTime($value); 

        // echo "timestamp " . $date->getTimestamp() ."\n";
        echo "timestamp " . $date->format('U') ."\n";
        
        $offset =   self::$timezone->getOffset($date);
        echo "offset $offset \n";
        
    }
}

$dtt    =   new DateTimeTest();
$dtt->run();
?>