Comments on PHP DateDiff Function - AddedBytes.com

Comment on PHP DateDiff Function

Comment by Sharla Hansen ( http://www.wonderfulproject.com )

Works well for me! Thanks!

Comment on PHP DateDiff Function

Comment by Ahmad Ridwan ( )

I am his(its first using direct query in its(the mysql database, isn't it mysql there is function of datediff to lessen or adds according to our desire.

But in php simply so complicated like this..

are there quicker, a few, and easy to be understood.

in mysql, example datediff(date of actually, date of comparison, number of less or in adding)

Comment on PHP DateDiff Function

Comment by Crispin ( http://www.myenergyusage.org )

Brilliant - thanks

Comment on PHP DateDiff Function

Comment by David ( )

function Difference( $From, $To ) {
$Date1Array = explode( "-", $From );
$Date2Array = explode( "-", $To );
$Date1Greg = gregoriantojd( $Date1Array[1], $Date1Array[2], $Date1Array[0] );
$Date2Greg = gregoriantojd( $Date2Array[1], $Date2Array[2], $Date2Array[0] );
return $Date2Greg - $Date1Greg;
}
$DaysDiff = Difference( "1985-06-01", "2009-06-01" );
$Done = false;
$Years = 0;
$Days = $DaysDiff;
while ( !$Done ) {
if ( $Days > 365 ) {
$Days = $Days - 365;
$Years = $Years + 1;
}
else {
$Done = true;
}
}
$Leap = $Years % 4;
$Leap = ( $Years - $Leap ) / 4;
$Days = $Days - $Leap;

echo $Years . " " . $Days;

Solves the problem, at least the one i had. Use strtotime() to work out months from $Days if you need to.

Comment on PHP DateDiff Function

Comment by Thomas Dilts ( http://www.chaniel.se )

Just wanted to say thanks for the datediff. The normal date functions in php just didn't do it for me but yours worked great.

Comment on PHP DateDiff Function

Comment by Sumesh ( )

Don't trust on 'mktime'
According to http://in2.php.net/mktime

"the range of valid years was limited to 1970 through 2038. "

It wont work if the year is beyond 2038!!!

Comment on PHP DateDiff Function

Comment by Gabor Balazs ( )

This algorithm doesn't give you the exact difference.
A simple code to get the exact age of someone from it's birth date:
$date_of_birth='20-04-1978';
$t=strtotime($date_of_birth);
if(date("Y")>date("Y",$t))
{
$age=date("Y")-date("Y",$t);
if(date("m") $age--;
else
if(date("m")==date("m",$t) and date("d") $age--;
}
else
$age=0;

Comment on PHP DateDiff Function

Comment by Christian S ( )

is it better or not to floor the time to the "difference resolution" before doing this difference ? like =>

function datediff($interval, $datefrom, $dateto)
{
// IMPORTANT : $dateto and $datefrom in time format
switch($interval) {
case "d": // Number of full days
$datediff = floor($dateto/86400) - floor($datefrom/86400); // Difference in days
break;

case "h": // Number of full hours
$datediff = floor($dateto/3600) - floor($datefrom/3600); // Difference in hours
break;

case "n": // Number of full minutes
$datediff = floor($dateto/60) - floor($datefrom/60); // Difference in minutes
break;

default: // Number of full seconds (default)
$datediff = $dateto - $datefrom; // Difference in seconds
break;
}
return $datediff;
}

Comment on PHP DateDiff Function

Comment by kitty ( )

how to work if the dates are in the format dd/mm/yyyy.

Comment on PHP DateDiff Function

Comment by khaild ( )

wow so many comments, here goes another comment...

thanks for bearing so many comments !!!! :D