RE: [PHP] difference between two times? Date_diff and DateTime::diff

Hi Matthew,

A quick note on the DateTime::diff() method - it's only available as from
PHP 5.3, which is currently in release candidate stage, meaning unless you
have your own server running PHP, it won't be available to use (hopefully -
I would be sceptical of any webhost which rolls out RCs on production
servers).

If you need to know what version of PHP you're running, use:
phpversion() or phpinfo()

> -----Original Message-----
> From: Matthew Croud [mailto:[email protected]]
> Sent: 16 June 2009 12:42
> To: Tom Chubb
> Cc: PHP General list
> Subject: Re: [PHP] difference between two times? Date_diff and
> DateTime::diff
> 
> Hi Tom,
> 
> Thanks for the reply,  I believe I have a fair understanding of
> functions, and I have followed the example on the PHP manual page (
> http://uk3.php.net/manual/en/function.date-diff.php
>   ), ideally I want to know how to use the class DateTime::diff, how
> can I use the DateTime::diff to get the difference between two times/
> dates ? I suppose then I'm after the syntax
> 
> would it be like this for example:
> $DIfferenceInTime  = DateTime::diff(10:00,12:32);
> 
> Thanks again for helping me out.
> 
> 
> 
> On 16 Jun 2009, at 12:33, Tom Chubb wrote:
> 
> > Matt,
> > Do you understand how to use functions?
> > A function is defined like this:
> >
> > function () {
> > //code goes here
> > }
> >
> > You can pass arguments to be used in a function like this:
> >
> > function($arg1, $arg2) {
> > //code goes here
> > }
> >
> > In the first example on the following page:
> http://uk3.php.net/manual/en/function.date-diff.php
> > To call the function you need to provide two arguments: $dtTime1 &
> > $dtTime2
> >
> > To use in a script, you need to first define the function, as per
> > the example:
> >
> > <?php
> >
> > function GetDeltaTime($dtTime1, $dtTime2)
> > {
> >   $nUXDate1 = strtotime($dtTime1->format("Y-m-d H:i:s"));
> >   $nUXDate2 = strtotime($dtTime2->format("Y-m-d H:i:s"));
> >
> >   $nUXDelta = $nUXDate1 - $nUXDate2;
> >   $strDeltaTime = "" . $nUXDelta/60/60; // sec -> hour
> >
> >   $nPos = strpos($strDeltaTime, ".");
> >   if (nPos !== false)
> >     $strDeltaTime = substr($strDeltaTime, 0, $nPos + 3);
> >
> >   return $strDeltaTime;
> > }
> >
> > ?>
> >
> > Then you need to call the function like this:
> >
> > <?php
> > GetDeltaTime("time1-goes-here", "time2-goes-here")
> > ?>
> >
> > And it should spit out the difference.
> >
> > Code is untested and if you didn't follow that I suggest you read up
> > on functions: http://www.w3schools.com/php/php_functions.asp
> >
> > Hope this helps - I'm probably in a similar situation to you and
> > have been dabbling with PHP for a few years just as a hobby but
> > thought I'd try and help out.
> > You'll learn a lot from reading this list as well.
> >
> > Cheers and good luck,
> >
> > Tom
> >
> >
> > 2009/6/16 Matthew Croud <[email protected]>
> >
> > Hello,
> >
> > My journey of learning PHP is going well, so i've decided to make a
> > small program which works out the difference between two times and
> > records the data in a text file.
> >
> > I've searched the PHP manual for functions which can help me out,
> > and I discovered the function Date_diff (
> http://uk3.php.net/manual/en/function.date-diff.php
> >  )and the class DateTime::diff (
> http://uk3.php.net/manual/en/datetime.diff.php
> >  )
> >
> > My question is, how on earth do I use these functions ? I really
> > don't understand the manual documentation.
> >
> > I've just moved onto the subject of classes and so I'm fairly new to
> > the concept, although I am following it well.
> >
> > If someone could explain to me how to use ether of these ( Date_diff
> > and DateTime::diff ) I would be VERY grateful.
> >
> > Thank you so much!
> > Matt
> >
> > --
> > PHP General Mailing List (http://www.php.net/)
> > To unsubscribe, visit: http://www.php.net/unsub.php
> >
> >
> >
> >
> 
> Matthew Croud
> Studio
> 
> Obvious Print Solutions Limited
> Unit 3 Abbeygate Court
> Stockett Lane
> Maidstone
> Kent
> ME15 0PP
> 
> T | 0845 094 9704
> F | 0845 094 9705
> www.obviousprint.com
> 
> 
> 
>