The timezone_offset_get() function returns the timezone offset from GMT.
Syntax
timezone_offset_get(obj, datetime)
Parameters
obj − Specifies the DateTimeZone object.
datetime − Specifies the DateTime that contains the date/time to compute the offset from.
Return
The timezone_offset_get() function returns the time zone offset in seconds on success or FALSE on failure.
Example
The following is an example −
<?php
$tz = timezone_open("America/Chicago");
$datetime = date_create("now", timezone_open("Europe/Amsterdam")); echo timezone_offset_get($tz, $datetime);
?>
Output
-18000