PHP | timezone_identifiers_list() Function

The timezone_identifiers_list() function is an inbuilt function in PHP which is used to return an indexed array containing all the timezone identifiers. The datetimezone object is sent as a parameter to the timezone_identifiers_list() function and it returns an indexed array on success or False on failure. Syntax:

array timezone_identifiers_list( $datetimezone, $country )

Parameters: This function accepts two parameter as mentioned above and described below:

• $datetimezone: It is an optional parameter which specifies the DateTimeZone class constant.
• country: It is also an optional parameter which specifies a two-letter ISO 3166-1 compatible country code.

Return Value: This function returns an indexed array on success or False on failure. Exceptions: The timezone_identifiers_list() function is an alias of DateTimeZone::listIdentifiers() function. Below programs illustrate the timezone_identifiers_list() function in PHP: Program 1: php

<?php

// Displaying all the timezone identifiers of Antarctica
echo ("All the timezones available in this timezone are ");
print_r(timezone_identifiers_list(4));
?>

Program 2: php

<?php

// Displaying the timezone identifiers of Africa
$timezone_identifiers = DateTimeZone::listIdentifiers();
for ($i = 0; $i < 8; $i++) 
{
    echo "$timezone_identifiers[$i]\n";
}
?>

Related Articles:

• PHP | timezone_offset_get() Function
• PHP | timezone_name_from_abbr() Function
• PHP | timezone_version_get() Function

Reference: https://www.php.net/manual/en/function.timezone-identifiers-list.php