PHP: Time Zones (Time Zones)
One of the most difficult parts of working with dates is time zones. The entire earth is divided into 24 time zones, meaning that in neighboring zones the time is often different by one hour. Zero time is Coordinated Universal Time (UTC). Time zones around the globe are expressed as a positive or negative offset from UTC. For example, the time zone in Moscow is +3.
The transition to daylight saving time and winter time adds a little zest to this system. And while the zones are strictly fixed, the transition to winter and summer time is the prerogative of individual states, which periodically introduce or cancel it. UTC time is never translated, shifts occur relative to it. On top of that, there are a thousand and one other problems.
The main rule when working with dates is that storage and comparison should be made in UTC format. But it's better to display the dates in the zone in which the user lives.
You can check the current zone with
date_default_timezone_get(). Set the zone with the
Display the current time zone.
The exercise doesn't pass checking. What to do? 😶
If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:
- Be sure to attach the test output, without it it's almost impossible to figure out what went wrong, even if you show your code. It's complicated for developers to execute code in their heads, but having a mistake before their eyes most probably will be helpful.
In my environment the code works, but not here 🤨
Tests are designed so that they test the solution in different ways and against different data. Often the solution works with one kind of input data but doesn't work with others. Check the «Tests» tab to figure this out, you can find hints at the error output.
My code is different from the teacher's one 🤔
It's fine. 🙆 One task in programming can be solved in many different ways. If your code passed all tests, it complies with the task conditions.
In some rare cases, the solution may be adjusted to the tests, but this can be seen immediately.
I've read the lessons but nothing is clear 🙄
It's hard to make educational materials that will suit everyone. We do our best but there is always something to improve. If you see a material that is not clear to you, describe the problem in “Discussions”. It will be great if you'll write unclear points in the question form. Usually, we need a few days for corrections.
By the way, you can participate in courses improvement. There is a link below to the lessons course code which you can edit right in your browser.