date_default_timezone_get
date_diff
Date/Time 함수 목록
PHP Manual

# date_default_timezone_set

(PHP 5 >= 5.1.0)

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

### 설명

bool date_default_timezone_set ( string `$timezone_identifier` )

date_default_timezone_set() 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.

### 인수

`timezone_identifier`

  The timezone identifier, like UTC or Europe/Lisbon. The list of valid identifiers is available in the 지원하는 시간대 목록.

### 반환값

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

### 예제

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.';
}
?>`

### 변경점

버전 | 설명
--- | ---
5.3.0 | Now throws `E_WARNING` rather then `E_STRICT`.
5.1.2 | The function started to validate the `timezone_identifier` parameter.

### 참고

- date_default_timezone_get() - Gets the default timezone used by all date/time functions in a script
- 지원하는 시간대 목록

date_default_timezone_get
date_diff
Date/Time 함수 목록
PHP Manual