php man page for date_default_timezone_set

DATE_DEFAULT_TIMEZONE_SET(3)						 1					      DATE_DEFAULT_TIMEZONE_SET(3)

date_default_timezone_set - Sets the default timezone used by all date/time functions in a script

SYNOPSIS
       bool date_default_timezone_set (string  $timezone_identifier)

DESCRIPTION
       date_default_timezone_set(3) sets the default timezone used by all date/time functions.

       Note

	       Since  PHP  5.1.0 (when the date/time functions were rewritten), every call to a date/time function will generate a E_NOTICE if the
	      timezone isn't valid, and/or a E_WARNING message if using the system settings or the $TZ environment variable.

	Instead of using this function to set the default timezone in your script, you can also use the  INI  setting  date.timezone  to  set  the
       default timezone.

PARAMETERS
	      o $timezone_identifier
		-  The	timezone identifier, like UTC or Europe/Lisbon. The list of valid identifiers is available in the "List of Supported Time-
		zones".

RETURN VALUES
	This function returns FALSE if the $timezone_identifier isn't valid, or TRUE otherwise.

EXAMPLES
       Example #1

	      Getting the default timezone

	      <?php
	      date_default_timezone_set('America/Los_Angeles');

	      $script_tz = date_default_timezone_get();

	      if (strcmp($script_tz, ini_get('date.timezone'))){
		  echo 'Script timezone differs from ini-set timezone.';
	      } else {
		  echo 'Script timezone and ini-set timezone match.';
	      }
	      ?>

CHANGELOG
       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.3.0	|						    |
       |	|						    |
       |	|     Now throws E_WARNING rather than E_STRICT.    |
       |	|						    |
       | 5.1.2	|						    |
       |	|						    |
       |	|  The function  started  to  validate	the  $time- |
       |	| zone_identifier parameter.			    |
       |	|						    |
       +--------+---------------------------------------------------+
SEE ALSO
       date_default_timezone_get(3), "List of Supported Timezones".

PHP Documentation Group 											      DATE_DEFAULT_TIMEZONE_SET(3)