Getting last month's date in php

91
votes

I want to get last month's date. I wrote this out:

$prevmonth = date('M Y');

Which gives me the current month/year. I can't tell if I should use strtotime, mktime. Something to the timestamp? Do I need to add something afterwards to reset so that the date isn't set to last month throughout everything for all timestamps on my site? I'm trying to RTM but it's hard for me to figure this out.

18
phpdate

18 Answers

227
votes

It's simple to get last month date

echo date("Y-n-j", strtotime("first day of previous month"));
echo date("Y-n-j", strtotime("last day of previous month"));

at November 3 returns

2014-10-1
2014-10-31
33
votes
echo strtotime("-1 month");

That will output the timestamp for last month exactly. You don't need to reset anything afterwards. If you want it in an English format after that, you can use date() to format the timestamp, ie:

echo date("Y-m-d H:i:s",strtotime("-1 month"));
20
votes
$prevmonth = date('M Y', strtotime("last month"));
14
votes

Incorrect answers are:

$lastMonth = date('M Y', strtotime("-1 month"));
$lastDate = date('Y-m', strtotime('last month'));

The reason is if current month is 30+ days but previous month is 29 and less $lastMonth will be the same as current month.

e.g. 

If $currentMonth = '30/03/2016';
echo $lastMonth = date('m-Y', strtotime("-1 month")); => 03-2016
echo $lastDate = date('Y-m', strtotime('last month')); => 2016-03

The correct answer will be:

echo date("m-Y", strtotime("first day of previous month")); => 02-2016
echo sprintf("%02d",date("m")-1) . date("-Y"); => 02-2016
echo date("m-Y",mktime(0,0,0,date("m")-1,1,date("Y"))); => 02-2016
6
votes

Found this one wrong when the previous months is shorter than current.

echo date("Y-m-d H:i:s",strtotime("-1 month"));

Try on March the 30th and you will get 2012-03-01 instead of 2012-02...

Working out on better solution...

6
votes

if you want to get just previous month, then you can use as like following

$prevmonth = date('M Y', strtotime('-1 months'));

if you want to get same days of previous month, Then you can use as like following ..

$prevmonth = date('M Y d', strtotime('-1 months'));

if you want to get last date of previous month , Then you can use as like following ...

$prevmonth = date('M Y t', strtotime('-1 months'));

if you want to get first date of previous month , Then you can use as like following ...

$prevmonth = date('M Y 1', strtotime('-1 months'));
6
votes
echo date('Y',strtotime("-1 year"));        //last year<br>
echo date('d',strtotime("-1 day"));     //last day<br>
echo date('m',strtotime("-1 month"));       //last month<br>
4
votes
public function getLastMonth() {
    $now = new DateTime();
    $lastMonth = $now->sub(new DateInterval('P1M'));
    return $lastMonth->format('Ym');
}
2
votes

Use this short code to get previous month for any given date:

$tgl = '25 january 2012';

$prevmonth = date("M Y",mktime(0,0,0,date("m", strtotime($tgl))-1,1,date("Y", strtotime($tgl))));
echo $prevmonth;

The result is December 2011. Works on a month with shorter day with previous month.

2
votes
$lastMonth = date('M Y', strtotime("-1 month"));
var_dump($lastMonth);
$lastMonth = date('M Y', mktime(0, 0, 0, date('m') - 1, 1, date('Y')));
var_dump($lastMonth);
1
votes

You can use strtotime, which is great in this kind of situations :

$timestamp = strtotime('-1 month');
var_dump(date('Y-m', $timestamp));

Will get you :

string '2009-11' (length=7)
1
votes
$time = mktime(0, 0, 0, date("m"),date("d")-date("t"), date("Y"));
$lastMonth = date("d-m-Y", $time);

OR

$lastMonth = date("m-Y", mktime() - 31*3600*24);

works on 30.03.2012

1
votes

Oh I figured this out, please ignore unless you have the same problem i did in which case:

$prevmonth = date("M Y",mktime(0,0,0,date("m")-1,1,date("Y")));
1
votes

The best solution I have found is this:

function subtracMonth($currentMonth, $monthsToSubtract){
        $finalMonth = $currentMonth;
        for($i=0;$i<$monthsToSubtract;$i++) {
            $finalMonth--;
            if ($finalMonth=='0'){
                $finalMonth = '12';
            }

        }
        return $finalMonth;

    }

So if we are in 3(March) and we want to subtract 5 months that would be

subtractMonth(3,5);

which would give 10(October). If the year is also desired, one could do this:

function subtracMonth($currentMonth, $monthsToSubtract){
    $finalMonth = $currentMonth;
    $totalYearsToSubtract = 0;
    for($i=0;$i<$monthsToSubtract;$i++) {
        $finalMonth--;
        if ($finalMonth=='0'){
            $finalMonth = '12';
            $totalYearsToSubtract++;
        }

    }
    //Get $currentYear
    //Calculate $finalYear = $currentYear - $totalYearsToSubtract 
    //Put resulting $finalMonth and $finalYear into an object as attributes
    //Return the object

}
0
votes

It works for me:

Today is: 31/03/2012

echo date("Y-m-d", strtotime(date('m', mktime() - 31*3600*24).'/01/'.date('Y').' 00:00:00')); // 2012-02-01
echo  date("Y-m-d", mktime() - 31*3600*24); // 2012-02-29
0
votes

If you want to get first date of previous month , Then you can use as like following ... $prevmonth = date('M Y 1', strtotime('-1 months')); what? first date will always be 1 :D

0
votes

This question is quite old but here goes anyway. If you're trying to get just the previous month and the day does not matter you can use this:

$date = '2014-01-03';

$dateTime = new DateTime($date);

$lastMonth = $dateTime->modify('-' . $dateTime->format('d') . ' days')->format('F Y');

echo $lastMonth; // 'December 2013'
0
votes

Simply get last month.

Example:

Today is: 2020-09-02

Code:

echo date('Y-m-d', strtotime(date('Y-m-d')." -1 month"));

Result:

2020-08-02