Subtracting days, months or years from date using php [closed]

Answer 1

You Could try

strtotime function in php its quite simple

<?php 
echo date("jS F, Y", strtotime("11.12.10")); 
// outputs 10th December, 2011 

echo date("jS F, Y", strtotime("11/12/10")); 
// outputs 12th November, 2010 

echo date("jS F, Y", strtotime("11-12-10")); 
// outputs 11th December, 2010  
?> 

Answer 2

use strtotime('date -years -months -days')

  <?php
    $time = strtotime('2001-11-14 -3 years -7 months -5 days');
    echo $date = date("Y-m-d", $time);

Answer 3

Here comes the DateTime:

$start_date = '2013-03-06';
$date = DateTime::createFromFormat('Y-m-d',$start_date);

$date->modify('+1 month');
echo $date->format('Y-m-d');//2013-04-06

$date->modify('+4 year');
echo $date->format('Y-m-d');//2017-04-06

$date->modify('+6 day');
echo $date->format('Y-m-d');//2017-04-12

$date->modify('+24 hours');
echo $date->format('Y-m-d');//2017-04-13

$date->modify('-7 years');
echo $date->format('Y-m-d'); //2010-04-13

$date->modify('-18 months');
echo $date->format('Y-m-d'); //2008-10-13

So on and so forth.

Answer 4

One way is to make the startBefore date a timestamp, than working with numbers and re-obtain the startAfter date, another way is to try to subtract days, months and years directly from the date.