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

Also, if you're returning data from MySQL, there are a number of operations
you can perform before it reaches your script:
http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html


 
________________________________________
From: Tom Chubb [mailto:[email protected]] 
Sent: 16 June 2009 15:55
To: Matthew Croud
Cc: Dajve Green; PHP General list
Subject: Re: [PHP] difference between two times? Date_diff and
DateTime::diff

The first example here may help:
http://us3.php.net/manual/en/function.time.php

----------------------------------------


2009/6/16 Matthew Croud <[email protected]>
Hi Dajve and Tom,

Thanks again, I totally didn't realise that this function is yet to be
implemented in the mainstream PHP,

So is there no function that exists in vanilla PHP that can take two
dates/times and supply the difference ?
If there isn't I do apologise, i've been talking to my friend who does
ASP.net and he said he was sure there is for PHP.






On 16 Jun 2009, at 13:11, Dajve Green wrote:

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

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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






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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


-- 
Tom Chubb
[email protected] | [email protected]
07912 202846

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