Timezone conversion in php

Question

Can anyone suggest an easy method to convert date and time to different timezones in php?

Answer 1

// Convert date from one zone to another..
/* 
$zone_from='Asia/Kolkata';

$zone_to='America/Phoenix';

date_default_timezone_set($zone_from);

$convert_date="2016-02-26 10:35:00";

echo $finalDate=zone_conversion_date($convert_date, $zone_from, $zone_to);

*/
function zone_conversion_date($time, $cur_zone, $req_zone)
{   
    date_default_timezone_set("GMT");
    $gmt = date("Y-m-d H:i:s");
    
    date_default_timezone_set($cur_zone);
    $local = date("Y-m-d H:i:s");
  
    date_default_timezone_set($req_zone);
    $required = date("Y-m-d H:i:s");
    
    /* return $required; */
    $diff1 = (strtotime($gmt) - strtotime($local));
    $diff2 = (strtotime($required) - strtotime($gmt));

    $date = new DateTime($time);
    $date->modify("+$diff1 seconds");
    $date->modify("+$diff2 seconds");

    return $timestamp = $date->format("Y-m-d H:i:s");
}