PHP subtract 1 month from date formated with date ('m-Y')

问题

I'm trying to subtract 1 month from a date.

$today = date('m-Y');

This gives: 08-2016

How can I subtract a month to get 07-2016?

回答1:

 <?php 
  echo $newdate = date("m-Y", strtotime("-1 months"));

output

07-2016

回答2:

Warning! The above-mentioned examples won't work if call them at the end of a month.

<?php
$now = mktime(0, 0, 0, 10, 31, 2017);
echo date("m-Y", $now)."\n";
echo date("m-Y", strtotime("-1 months", $now))."\n";

will output:

10-2017
10-2017

The following example will produce the same result:

$date = new DateTime('2017-10-31 00:00:00');
echo $date->format('m-Y')."\n";
$date->modify('-1 month');
echo $date->format('m-Y')."\n";

Plenty of ways how to solve the issue can be found in another thread: PHP DateTime::modify adding and subtracting months

回答3:

Try this,

$today = date('m-Y');
$newdate = date('m-Y', strtotime('-1 months', strtotime($today))); 
echo $newdate;

回答4:

Depending on your PHP version you can use DateTime object (introduced in PHP 5.2 if I remember correctly):

<?php
$today = new DateTime(); // This will create a DateTime object with the current date
$today->modify('-1 month');

You can pass another date to the constructor, it does not have to be the current date. More information: http://php.net/manual/en/datetime.modify.php

回答5:

if(date("d") > 28){
    $date = date("Y-m", strtotime("-".$loop." months -2 Day"));
} else {
    $date = date("Y-m", strtotime("-".$loop." months"));
}

回答6:

$lastMonth = date('Y-m', strtotime('-1 MONTH'));

回答7:

First change the date format m-Y to Y-m

    $date = $_POST('date'); // Post month
    or
    $date = date('m-Y'); // currrent month

    $date_txt = date_create_from_format('m-Y', $date);
    $change_format = date_format($date_txt, 'Y-m');

This code minus 1 month to the given date

    $final_date = new DateTime($change_format);
    $final_date->modify('-1 month');
    $output = $final_date->format('m-Y');

回答8:

Try this,

$effectiveDate = date('2018-01'); <br> 
echo 'Date'.$effectiveDate;<br>
$effectiveDate = date('m-y', strtotime($effectiveDate.'+-1 months'));<br>
echo 'Date'.$effectiveDate;

来源：https://stackoverflow.com/questions/38738910/php-subtract-1-month-from-date-formated-with-date-m-y

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php

date

subtraction