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:matt@obviousdigital.com] > 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 <matt@obviousdigital.com> > > > > 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 > > > >