Lynda - Easy PHP Projects: Time Zone Conversion (2016) [repost]

Follow along with Easy PHP Projects to practice your PHP skills while solving real-world programming challenges. This project focuses on converting dates and times between time zones using PHP's built-in functions. Kevin Skoglund explains the history and purpose of time zones, along with quirks like daylight saving time, and then shows how to design location-sensitive webpages and to build a PHP-driven time zone calculator. Each tutorial offers practical PHP techniques suitable for any developer, including PHP beginners.

Content:
Introduction
Welcome
How to use the exercise files

1. About Time Zones
History
UTC and time zone offsets
Daylight saving time (DST)

2. Default Time Zone
PHP time zone identifiers
Set default in php.ini
Set default at runtime

3. Working with Time Zones in PHP
Understanding Unix time
PHP procedural functions
PHP DateTime
PHP DateTimeZone
DST transitions

4. User Time Zone Selection
Create the form
Add a time zone Selection-Option
Include the time zone offset
Improve offset formatting
Store the time zone selection

5. Respect the User's Time Zone
Display the current time
Convert to user's time zone
Challenge: Create a maintenance page
Solution: Create a maintenance page
Store dates in a database

6. Current World Times
List time zones
Challenge: Use major cities
Solution: Use major cities
Sort cities by offset
More efficient sorting

7. Time Zone Calculator
Create the form
Time zone options function
Convert the time zone
Create date selectors
Create minute selector
Create hour selector
Process date and time selections

Conclusion
Next steps