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

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
>>>
>>> --
>>> 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
>>
>>
>>
>>
>
>
>
> -- 
> 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