php man page for date_default_timezone_get

DATE_DEFAULT_TIMEZONE_GET(3)						 1					      DATE_DEFAULT_TIMEZONE_GET(3)

date_default_timezone_get - Gets the default timezone used by all date/time functions in a script

SYNOPSIS
       string date_default_timezone_get (void  )

DESCRIPTION
	In order of preference, this function returns the default timezone by:

	      o Reading the timezone set using the date_default_timezone_set(3) function (if any)

	      o Prior to PHP 5.4.0
		only: Reading the $TZ environment variable (if non empty)

	      o Reading the value of the date.timezone ini option (if set)

	      o Prior to PHP 5.4.0
		only:  Querying the host operating system (if supported and allowed by the OS). This uses an algorithm that has to guess the time-
		zone. This is by no means going to work correctly for every situation. A warning is shown when this stage is reached. Do not  rely
		on it to be guessed correctly, and set date.timezone to the correct timezone instead.

	If none of the above succeed, date_default_timezone_get will return a default timezone of UTC.

RETURN VALUES
	Returns a string.

CHANGELOG
       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.4.0	|						    |
       |	|						    |
       |	|  The TZ environment variable is no longer used to |
       |	| guess the timezone.				    |
       |	|						    |
       | 5.4.0	|						    |
       |	|						    |
       |	|  The timezone is no longer guessed from  informa- |
       |	| tion	available  through  the operating system as |
       |	| the guessed timezone can not be relied on.	    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES
       Example #1

	      Getting the default timezone

	      <?php
	      date_default_timezone_set('Europe/London');

	      if (date_default_timezone_get()) {
		  echo 'date_default_timezone_set: ' . date_default_timezone_get() . '<br />';
	      }

	      if (ini_get('date.timezone')) {
		  echo 'date.timezone: ' . ini_get('date.timezone');
	      }

	      ?>

	      The above example will output something similar to:

	      date_default_timezone_set: Europe/London
	      date.timezone: Europe/London

       Example #2

	      Getting the abbreviation of a timezone

	      <?php
	      date_default_timezone_set('America/Los_Angeles');
	      echo date_default_timezone_get() . ' => ' . date('e') . ' => ' . date('T');
	      ?>

	      The above example will output:

	      America/Los_Angeles => America/Los_Angeles => PST

SEE ALSO
       date_default_timezone_set(3), "List of Supported Timezones".

PHP Documentation Group 											      DATE_DEFAULT_TIMEZONE_GET(3)