PHP DateTimeZone - getOffset() Method

The PHP DateTimeZone::getOffset() method returns the offset to GMT for the date/time specified by datetime parameter. The GMT offset is calculated with the timezone information contained in the DateTimeZone object being used. The timezone_offset_get() function is an alias of this method.

Syntax

//Object-oriented style
public DateTimeZone::getOffset(datetime)

//Procedural style
timezone_offset_get(object, datetime)

Parameters

`object`	`Required.` For procedural style only: A DateTimeZone object returned by timezone_open().
`datetime`	`Required.` Specify the DateTime that contains the date/time to compute the offset from.

Return Value

Returns time zone offset in seconds.

Example: using both styles

The example below shows the usage of DateTimeZone::getOffset() method.

<?php
  //creating a DateTimeZone and DateTime object
  $tz1 = new DateTimeZone("Europe/London");
  $date1 = new DateTime("10-May-2015", $tz1);

  //offset to GMT using Object-oriented style
  echo "The offset to GMT: ".$tz1->getOffset($date1)."\n";

  //creating a DateTimeZone and DateTime object
  $tz2 = new DateTimeZone("America/Chicago");
  $date2 = new DateTime("10-May-2015", $tz2);

  //offset to GMT using Procedural style
  echo "The offset to GMT: "
       .timezone_offset_get($tz2, $date2)."\n";
?>

The output of the above code will be:

The offset to GMT: 3600
The offset to GMT: -18000

❮ PHP Date and Time Reference