php中的日期时间时区

Question

我在不同的服务器上运行两个不同的脚本，我只需要在两个服务器上获得准确的 DateTime。所以我需要为纽约市设置时区，无论更改 php.ini （我不需要使用 php.ini 设置）

 php script :
 public static function formatMysql($str = 'now')
    {
        return date('Y-m-d H:i:s', strtotime($str));
    }

Answer 1

<?php
date_default_timezone_set('America/Los_Angeles');//Your global default timeZone.

function convertTimeZone($oTime, $oTimeZone, $nTimeZone) 
{
//Parameter string $oTime is original time to be converted from in format F-d-Y h:i:s
//Parameter string $oTimeZone is timezone to be conveted from- Timezone of $oTimeZone
//Parameter string $nTimeZone is timezone to be conveted to

date_default_timezone_set($oTimeZone);  //Change default timezone to old timezone within this function only.

$originalTime = new DateTime($oTime);

$originalTime->setTimeZone(new DateTimeZone($nTimeZone)); //Convert to desired TimeZone.

date_default_timezone_set('America/Los_Angeles') ; //Reset default TimeZone according to your global settings.

return $originalTime->format('F-d-Y h:i:s A'); //Return converted TimeZone.
} 

$LATime = convertTimeZone("2011-01-07 19:55:00","America/Chicago", "America/Los_Angeles");

echo $LATime;