Return the timezone name from abbreviation in PHP

Description

The following code shows how to return the timezone name from abbreviation.

Example

  //w w  w.ja  va  2 s .c  o  m
<?php
    echo timezone_name_from_abbr("EST") . "<br>";
    echo timezone_name_from_abbr("",7200,0);
?>

The code above generates the following result.