PHP：不正确的strtotime（）

Question

I had gone through various stackoverflow solutions and other blogs but still it doesn't fix my problem.

Let's say that the date today is: 2013-12-28 and I want to get the date after 1 month and it is supposed to display 2014-01-28 .

$date = date('o-m-d');
$final = date('o-m-d', strtotime("+1 month", $date));
echo $final;

Above is my code. It returns 02/01/1970 .

I have also tried the mktime method but still it displays the 1970 output.

What am I doing wrong?

BTW. I am working this on a hosted server.

Thanks ahead. :)

Answer 1

Use DateTime function modify

$date = new DateTime( 'o-m-d' );  
echo $date->modify( '+1 month' )->format('o-m-d');

Answer 2

If you want the current date +1 month use:

$final = date('o-m-d', strtotime("+1 month"));

Or with a given date:

$date = date('o-m-d');
$final = date('o-m-d', strtotime($date . " +1 month"));
echo $final;

If you want to use the second parameter of strtotime it has to be a timestamp.

Answer 3

Go the OOP way..

<?php
$date = new DateTime('2013-12-28');
$date->add(new DateInterval('P1M'));
echo $date->format('Y-m-d'); //prints 2014-01-28