PHP library for named time offsets

A library providing a mapping from named time offsets (e.g., Pacific Standard Time, Pacific Daylight Time) to integer IDs for more efficient storing and to their common abbreviations for convenient display.

This is not a library for determining timezones or handling their changing offsets. It does not have any dependency on the [timezone database] tzdata.

It may be desirable to allow a user to enter time in a specific time offset and remember which offset for later display. Although abbreviations are the most common way for people to work with offsets, they are not unique. The full offset names are unique, but they are verbose and inefficient for storage.

This library attempts to address the issue by providing unique numeric constants for storage mapped to full names and abbreviations for display.

From the command line, run:

$ ./bin/phpunit