Answers for "how to set correct timezone in php"

php default timezone

date_default_timezone_set("Asia/Kolkata");
// List of Supported Timezones https://www.php.net/manual/en/timezones.php

how to get the list of available timezones in php

//To Get the list of timezones available in php
//use the static function listIdentifiers() on DateTimeZone class
$list = DateTimeZone::listIdentifiers();
print_r($list)