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:matt@xxxxxxxxxxxxxxxxxx]
> >> Sent: 16 June 2009 12:42
> >> To: Tom Chubb
> >> Cc: PHP General list
> >> Subject: Re: 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@xxxxxxxxxxxxxxxxxx>
> >>>
> >>> 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
>
>
>
>
>
>
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