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

Wonderful, thanks Ian for your function, and also thank you Tom for  
having a head scratch on my behalf ;)



On 16 Jun 2009, at 16:20, Ian wrote:

> On 16 Jun 2009 at 14:05, Matthew Croud wrote:
>
>> 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.
>
> Hi,
>
> This is a quick function that works using unix time stamps.  Its a  
> bit quick and messy but
> works ok.  Take a look at the manual page for the strtotime()  
> function to get a better idea
> of what it can handle.
>
> <?
>
> $Date1_UnixTimeStamp=strtotime("10:10:45");
> $Date2_UnixTimeStamp=strtotime("12:45:03");
>
> print_r(DateDiff( $Date1_UnixTimeStamp, $Date2_UnixTimeStamp));
>
> function DateDiff( $Date1_UnixTimeStamp, $Date2_UnixTimeStamp){
> 	
> 	$return_difference	= Array(
> 		"Days"		=>	0,
> 		"Hours"		=>	0,
> 		"Minutes"	=>	0,
> 		"Seconds"	=>	0
> 	);
> 	
> 	$amounts	= Array(
> 		"Days"		=>	60*60*24,
> 		"Hours"		=>	60*60,
> 		"Minutes"	=>	60
> 	);
> 	
> 	$difference = $Date2_UnixTimeStamp - $Date1_UnixTimeStamp;
> 	
> 	if($difference >= $amounts["Days"]){
> 		$return_difference["Days"] = floor($difference / $amounts["Days"]);
> 		$difference -=  $return_difference["Days"] * $amounts["Days"];
> 	}
> 	
> 	if($difference >= $amounts["Hours"]){
> 		$return_difference["Hours"] = floor($difference /  
> $amounts["Hours"]);
> 		$difference -=   $return_difference["Hours"] * $amounts["Hours"];
> 	}
> 	if($difference >= $amounts["Minutes"]){
> 		$return_difference["Minutes"] = floor($difference /  
> $amounts["Minutes"]);
> 		$difference -=  $return_difference["Minutes"] * $amounts["Minutes"];
> 	}
> 	
> 	$return_difference["Seconds"] = $difference;
> 	
> 	return $return_difference;
> }
>
> ?>
>
> Regards
>
> Ian
> -- 
>
>
>
>> 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
>>
>>
>>
>>
>>
>>
>
>
>
> -- 
> 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