PHP：将此时区中的星期一转换为UTC

Question

I am building an App that fetches all entries a user has made "this week" (in their timezone). I store all entry times in the database as UTC/GMT time using:

gmdate('U')

My problem arises when I need to fetch "this week" in their timezone. Before i took timezones into account i used...

$startWeek = strtotime('monday this week 00:00')
$endWeek = strtotime('sunday this week 00:00')

...and used a SQL statement that searched BETWEEN those two variables.

The problem is, those two variables are using the server times, so it gives the servers start and end of the week.

I have access to the users timezone (ie: Australia/Melbourne) in a cookie if needed.

Bottom line, how do I fetch the beginning and end of the week, in timestamp format, in the timezone i have stored in a cookie?

Answer 1

I think date_default_timezone_set function fits your requirement:

http://www.php.net/manual/en/function.date-default-timezone-set.php

You need to get the timezone from the user and then call the function with it. Going from the timezone, the following snippet should work:

date_default_timezone_set('Melbourne/Australia');