date_default_timezone_set
In versions < 5.3.0 I simply use this form for calculate the number of days
<?php
$today = strtotime("2011-02-03 00:00:00");
$myBirthDate = strtotime("1964-10-30 00:00:00");
printf("I'm %d days old.", round(abs($today-$myBirthDate)/60/60/24));
?>
Descripción
Esta función es un alias de: DateTime::diff()
add a note
User Contributed Notes
date_diff
alessandro dot faustini at nixylab dot it
03-Feb-2011 06:08
kshegunov at gmail dot com
10-Jan-2011 05:26
Here is how I solved the problem of missing date_diff function with php versions below 5.3.0
The function accepts two dates in string format (recognized by strtotime() hopefully), and returns the date difference in an array with the years as first element, respectively months as second, and days as last element.
It should be working in all cases, and seems to behave properly when moving through February.
<?php
function dateDifference($startDate, $endDate)
{
$startDate = strtotime($startDate);
$endDate = strtotime($endDate);
if ($startDate === false || $startDate < 0 || $endDate === false || $endDate < 0 || $startDate > $endDate)
return false;
$years = date('Y', $endDate) - date('Y', $startDate);
$endMonth = date('m', $endDate);
$startMonth = date('m', $startDate);
// Calculate months
$months = $endMonth - $startMonth;
if ($months <= 0) {
$months += 12;
$years--;
}
if ($years < 0)
return false;
// Calculate the days
$offsets = array();
if ($years > 0)
$offsets[] = $years . (($years == 1) ? ' year' : ' years');
if ($months > 0)
$offsets[] = $months . (($months == 1) ? ' month' : ' months');
$offsets = count($offsets) > 0 ? '+' . implode(' ', $offsets) : 'now';
$days = $endDate - strtotime($offsets, $startDate);
$days = date('z', $days);
return array($years, $months, $days);
}
?>
Sven Obser
16-Sep-2010 07:40
Here is an incomplete workaround for PHP < 5.3.0
<?php
/**
* Workaround for PHP < 5.3.0
*/
if(!function_exists('date_diff')) {
class DateInterval {
public $y;
public $m;
public $d;
public $h;
public $i;
public $s;
public $invert;
public function format($format) {
$format = str_replace('%R%y', ($this->invert ? '-' : '+') . $this->y, $format);
$format = str_replace('%R%m', ($this->invert ? '-' : '+') . $this->m, $format);
$format = str_replace('%R%d', ($this->invert ? '-' : '+') . $this->d, $format);
$format = str_replace('%R%h', ($this->invert ? '-' : '+') . $this->h, $format);
$format = str_replace('%R%i', ($this->invert ? '-' : '+') . $this->i, $format);
$format = str_replace('%R%s', ($this->invert ? '-' : '+') . $this->s, $format);
$format = str_replace('%y', $this->y, $format);
$format = str_replace('%m', $this->m, $format);
$format = str_replace('%d', $this->d, $format);
$format = str_replace('%h', $this->h, $format);
$format = str_replace('%i', $this->i, $format);
$format = str_replace('%s', $this->s, $format);
return $format;
}
}
function date_diff(DateTime $date1, DateTime $date2) {
$diff = new DateInterval();
if($date1 > $date2) {
$tmp = $date1;
$date1 = $date2;
$date2 = $tmp;
$diff->invert = true;
}
$diff->y = ((int) $date2->format('Y')) - ((int) $date1->format('Y'));
$diff->m = ((int) $date2->format('n')) - ((int) $date1->format('n'));
if($diff->m < 0) {
$diff->y -= 1;
$diff->m = $diff->m + 12;
}
$diff->d = ((int) $date2->format('j')) - ((int) $date1->format('j'));
if($diff->d < 0) {
$diff->m -= 1;
$diff->d = $diff->d + ((int) $date1->format('t'));
}
$diff->h = ((int) $date2->format('G')) - ((int) $date1->format('G'));
if($diff->h < 0) {
$diff->d -= 1;
$diff->h = $diff->h + 24;
}
$diff->i = ((int) $date2->format('i')) - ((int) $date1->format('i'));
if($diff->i < 0) {
$diff->h -= 1;
$diff->i = $diff->i + 60;
}
$diff->s = ((int) $date2->format('s')) - ((int) $date1->format('s'));
if($diff->s < 0) {
$diff->i -= 1;
$diff->s = $diff->s + 60;
}
return $diff;
}
}
?>
Sergio Abreu
26-Jun-2010 02:22
<?php
/*
* A mathematical decimal difference between two informed dates
*
* Author: Sergio Abreu
* Website: http://sites.sitesbr.net
*
* Features:
* Automatic conversion on dates informed as string.
* Possibility of absolute values (always +) or relative (-/+)
*/
function s_datediff( $str_interval, $dt_menor, $dt_maior, $relative=false){
if( is_string( $dt_menor)) $dt_menor = date_create( $dt_menor);
if( is_string( $dt_maior)) $dt_maior = date_create( $dt_maior);
$diff = date_diff( $dt_menor, $dt_maior, ! $relative);
switch( $str_interval){
case "y":
$total = $diff->y + $diff->m / 12 + $diff->d / 365.25; break;
case "m":
$total= $diff->y * 12 + $diff->m + $diff->d/30 + $diff->h / 24;
break;
case "d":
$total = $diff->y * 365.25 + $diff->m * 30 + $diff->d + $diff->h/24 + $diff->i / 60;
break;
case "h":
$total = ($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h + $diff->i/60;
break;
case "i":
$total = (($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i + $diff->s/60;
break;
case "s":
$total = ((($diff->y * 365.25 + $diff->m * 30 + $diff->d) * 24 + $diff->h) * 60 + $diff->i)*60 + $diff->s;
break;
}
if( $diff->invert)
return -1 * $total;
else return $total;
}
/* Enjoy and feedback me ;-) */
?>
Flavio Tubino
27-May-2010 12:37
This is a very simple function to calculate the difference between two datetime values, returning the result in seconds. To convert to minutes, just divide the result by 60. In hours, by 3600 and so on.
Enjoy.
<?php
function time_diff($dt1,$dt2){
$y1 = substr($dt1,0,4);
$m1 = substr($dt1,5,2);
$d1 = substr($dt1,8,2);
$h1 = substr($dt1,11,2);
$i1 = substr($dt1,14,2);
$s1 = substr($dt1,17,2);
$y2 = substr($dt2,0,4);
$m2 = substr($dt2,5,2);
$d2 = substr($dt2,8,2);
$h2 = substr($dt2,11,2);
$i2 = substr($dt2,14,2);
$s2 = substr($dt2,17,2);
$r1=date('U',mktime($h1,$i1,$s1,$m1,$d1,$y1));
$r2=date('U',mktime($h2,$i2,$s2,$m2,$d2,$y2));
return ($r1-$r2);
}
?>
eugene at ultimatecms dot co dot za
17-Mar-2010 07:58
This function calculates the difference up to the second.
<?php
function date_diff($start, $end="NOW")
{
$sdate = strtotime($start);
$edate = strtotime($end);
$time = $edate - $sdate;
if($time>=0 && $time<=59) {
// Seconds
$timeshift = $time.' seconds ';
} elseif($time>=60 && $time<=3599) {
// Minutes + Seconds
$pmin = ($edate - $sdate) / 60;
$premin = explode('.', $pmin);
$presec = $pmin-$premin[0];
$sec = $presec*60;
$timeshift = $premin[0].' min '.round($sec,0).' sec ';
} elseif($time>=3600 && $time<=86399) {
// Hours + Minutes
$phour = ($edate - $sdate) / 3600;
$prehour = explode('.',$phour);
$premin = $phour-$prehour[0];
$min = explode('.',$premin*60);
$presec = '0.'.$min[1];
$sec = $presec*60;
$timeshift = $prehour[0].' hrs '.$min[0].' min '.round($sec,0).' sec ';
} elseif($time>=86400) {
// Days + Hours + Minutes
$pday = ($edate - $sdate) / 86400;
$preday = explode('.',$pday);
$phour = $pday-$preday[0];
$prehour = explode('.',$phour*24);
$premin = ($phour*24)-$prehour[0];
$min = explode('.',$premin*60);
$presec = '0.'.$min[1];
$sec = $presec*60;
$timeshift = $preday[0].' days '.$prehour[0].' hrs '.$min[0].' min '.round($sec,0).' sec ';
}
return $timeshift;
}
// EXAMPLE:
$start_date = 2010-03-15 13:00:00
$end_date = 2010-03-17 09:36:15
echo date_diff($start_date, $end_date);
?>
Returns: 1days 20hours 36min 15sec
Can be taken up to centuries - if you do the calculations.
Hope this finally helps someone! :D
mark at dynom dot nl
02-Jul-2009 12:44
If you simply want to compare two dates, using conditional operators works too:
<?php
$start = new DateTime('08-06-1995 Europe/Copenhagen'); // DD-MM-YYYY
$end = new DateTime('22-11-1968 Europe/Amsterdam');
if ($start < $end) {
echo "Correct order";
} else {
echo "Incorrect order, end date is before the starting date";
}
?>
tom at knapp2meter dot tk
16-Apr-2009 03:06
A simple way to get the time lag (format: <hours>.<one-hundredth of one hour>).
Hier ein einfacher Weg zur Bestimmung der Zeitdifferenz (Format: <Stunden>.<hundertstel Stunde>).
<?php
function GetDeltaTime($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;
}
?>