Php – Modify DateTime object

datetimePHP

I create an object

$date = new DateTime();

It is set to current date 2011-04-01 21:43:40. I try the following

$date->modify('midnight');

I expect the object to set to 2011-04-01 00:00:00. But nothing happened. Object hadn't beed modified, and continue to have a 2011-04-01 21:43:40 date. I just want to reset the time to midnight (00:00:oo).

Best Answer

http://codepad.org/w5RAF0Lh

This piece of code (with midnight) will not work without date.timezone setting

UPDATE: this piece of code requires PHP 5.3.6 to work correctly. In previous versions DateTime::modify('midnight') didn't work

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An easy to understand and simple solution.

// Save today's date.
var today = DateTime.Today;

// Calculate the age.
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However, this assumes you are looking for the western idea of the age and not using East Asian reckoning.

Sql – How to return only the Date from a SQL Server DateTime datatype

SELECT DATEADD(dd, 0, DATEDIFF(dd, 0, @your_date))

for example

SELECT DATEADD(dd, 0, DATEDIFF(dd, 0, GETDATE()))

gives me

2008-09-22 00:00:00.000

Pros:

No varchar<->datetime conversions required
No need to think about locale

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