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date_default_timezone_set

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

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

Description

function date_default_timezone_set(string $timezoneId): bool

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

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

timezoneId: The timezone identifier, like UTC, Africa/Lagos, Asia/Hong_Kong, or Europe/Lisbon. The list of valid identifiers is available in the List of Supported Timezones.

Return Values

This function returns false if the timezoneId 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();
$ini_tz = ini_get('date.timezone');

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

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