PHP 日期时间函数 timezone_abbreviations_list()

<?php
   $timezone_abbreviations = timezone_abbreviations_list ();
   print_r($timezone_abbreviations["acst"]);
   echo "----------------------------------------------\n";

   # Using second function.
   $timezone_abbreviations = DateTimeZone::listAbbreviations();

   print_r($timezone_abbreviations["acst"]);
?>