Friday 1st February 2008

by Mr Me

The new web 2.0 displays time and date not in old style manner like 12.30 pm Jan 200 7. The new generation need relative time like 2 hours ago, 6 months ago, 4 years ago, very old etc. So if you save the timestamp of a particular content creation in database we can simply show this ‘ago time calculation’ using the following algorithm.

//$datefrom is the timestamp for the content , and you can leave the $dateto value to see the current delay

PHP
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function TimeAgo($datefrom,$dateto=-1)
{
// Defaults and assume if 0 is passed in that
// its an error rather than the epoch
if($datefrom<=0) { return "A long time ago"; }
if($dateto==-1) { $dateto = time(); }
// Calculate the difference in seconds betweeen
// the two timestamps
$difference = $dateto - $datefrom;
// If difference is less than 60 seconds,
// seconds is a good interval of choice
if($difference < 60)
{
$interval = "s";
}
// If difference is between 60 seconds and
// 60 minutes, minutes is a good interval
elseif($difference >= 60 && $difference<60*60)
{
$interval = "n";
}
// If difference is between 1 hour and 24 hours
// hours is a good interval
elseif($difference >= 60*60 && $difference<60*60*24)
{
$interval = "h";
}
// If difference is between 1 day and 7 days
// days is a good interval
elseif($difference >= 60*60*24 && $difference<60*60*24*7)
{
$interval = "d";
}
// If difference is between 1 week and 30 days
// weeks is a good interval
elseif($difference >= 60*60*24*7 && $difference <
60*60*24*30)
{
$interval = "ww";
}
// If difference is between 30 days and 365 days
// months is a good interval, again, the same thing
// applies, if the 29th February happens to exist
// between your 2 dates, the function will return
// the 'incorrect' value for a day
elseif($difference >= 60*60*24*30 && $difference <
60*60*24*365)
{
$interval = "m";
}
// If difference is greater than or equal to 365
// days, return year. This will be incorrect if
// for example, you call the function on the 28th April
// 2008 passing in 29th April 2007. It will return
// 1 year ago when in actual fact (yawn!) not quite
// a year has gone by
elseif($difference >= 60*60*24*365)
{
$interval = "y";
}
// Based on the interval, determine the
// number of units between the two dates
// From this point on, you would be hard
// pushed telling the difference between
// this function and DateDiff. If the $datediff
// returned is 1, be sure to return the singular
// of the unit, e.g. 'day' rather 'days'
switch($interval)
{
case "m":
$months_difference = floor($difference / 60 / 60 / 24 /
29);
while (mktime(date("H", $datefrom), date("i", $datefrom),
date("s", $datefrom), date("n", $datefrom)+($months_difference),
date("j", $dateto), date("Y", $datefrom)) < $dateto)
{
$months_difference++;
}
$datediff = $months_difference;
// We need this in here because it is possible
// to have an 'm' interval and a months
// difference of 12 because we are using 29 days
// in a month
if($datediff==12)
{
$datediff--;
}
$res = ($datediff==1) ? "$datediff month ago" : "$datediff
months ago";
break;
case "y":
$datediff = floor($difference / 60 / 60 / 24 / 365);
$res = ($datediff==1) ? "$datediff year ago" : "$datediff
years ago";
break;
case "d":
$datediff = floor($difference / 60 / 60 / 24);
$res = ($datediff==1) ? "$datediff day ago" : "$datediff
days ago";
break;
case "ww":
$datediff = floor($difference / 60 / 60 / 24 / 7);
$res = ($datediff==1) ? "$datediff week ago" : "$datediff
weeks ago";
break;
case "h":
$datediff = floor($difference / 60 / 60);
$res = ($datediff==1) ? "$datediff hour ago" : "$datediff
hours ago";
break;
case "n":
$datediff = floor($difference / 60);
$res = ($datediff==1) ? "$datediff minute ago" :
"$datediff minutes ago";
break;
case "s":
$datediff = $difference;
$res = ($datediff==1) ? "$datediff second ago" :
"$datediff seconds ago";
break;
}
return $res;
}

Tags: , , ,

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22 Responses to “PHP time ago calculation”

  1. fayis says:

    ( ! ) Parse error: syntax error, unexpected ‘;’ in C:\wamp\www\newTest\forum.php on line 228

    228th line:

    if($datefrom<=0) { return “A long time ago”; }

  2. MARLON says:

    ARE WE IN PREP SCHOOL?

  3. Rykiel says:

    Very neat and well done!

  4. Allison says:

    Thanks for the code, accurate and easy to plug in!

  5. Jeremy says:

    This seems to work better

    http://pastebin.com/kAUKBmCc

  6. Murugavel says:

    Hi buddy..

    Thanks for your post..

    Its great..

    Expecting more source codes from you man..

    :-o

  7. Mike says:

    Great work, thanks for posting :)

  8. joomla says:

    add one line “$datefrom = strtotime($datefrom);” right after “function TimeAgo($datefrom,$dateto=-1)
    {” to display your time properly. I was thinking what is missing, but as you mention above mention line, it will work fine…

    thanks for the great code!

  9. ben says:

    Sorry mate, it didn’t work for me. Cheers.

  10. Theo says:

    Great Work !

    Thanxs !!

  11. [...] PHP Time Ago Calculation Soy Alfredo Artiles, Co-Fundador de equipo24 y e24Presenter. Mi pasión es el AJAX, SEO, SEM y [...]

  12. Tunde says:

    minute ago not working. Others are working perfect. I use 2009-07-23 09:11:50 as starting and 2009-07-23 09:59:50 as ending date. Can anyone help me. If you get the solution send it to tfrancislinks@yahoo.com

  13. Matt says:

    Fail, it’s littered with “&lt” and “&gt”.

  14. Gopinathan says:

    Hi,

    Great code. Thanks for sharing. Really good

  15. Travis says:

    Very nice, works great! Thanks for sharing!

  16. A1dezine says:

    Great stuff. I got what i was looking. Thank you very much to share this code here, appreciated .

  17. Venkatesan says:

    Really Great script. It helps me lot.
    Thanks.

  18. Tom says:

    Brilliant – just what I needed. Thank you.

  19. mfields says:

    Hi,
    Is there a license on this code…
    Looks great would love to use it!!!
    Thanks!!!

  20. Bill says:

    Exactly what I was looking for! Great job. Thanks for sharing.

  21. Binny V A says:

    When posting code, could you put it in pre tag? Otherwise the indentation is lost.

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