convert time from utc to locale timezone

utc2local.php

<?
//convert time from utc to locale timezone
$tz = getenv('TZ');  // Get current server time zone setting 
echo "Current timezone setting: $tz <br>"; 
putenv("TZ=EST5EDT"); // Change to US Eastern time zone or whatever you want 
$lt = localtime(time(), TRUE); 
echo "EST local time: ".$lt['tm_hour'].':'.$lt['tm_min'].':'.$lt['tm_sec']." <br>"; 
putenv("TZ=$tz"); // Change it back to the original server time zone  
?>