Adding days/weeks to formatted date

Question

I have a date formatted like this: Ymd

I can't seem to find a way to be able to add a number of weeks to this date, I have tried the following:

$quote_start_date = $job['quote_authorised'];

$newdate = date($quote_start_date, strtotime('+5 weeks'));

However the new date is the same, what is the easiest way to add weeks to a date formatted like this?

The output of quote_start_date, is a date, formatted like this: Ymd, so for example 20170618 — Aaranihlus, Sep 13 '17 at 08:33
@Aaranihlus Not sure why there is no dash(-) or forward slash (/) there when you are passing. Any particular reason may be. — Mittul At TechnoBrave, Sep 13 '17 at 08:36
Possible duplicate of [PHP - Add one week to a user defined date](https://stackoverflow.com/questions/28807774/php-add-one-week-to-a-user-defined-date) — Edwin, Sep 13 '17 at 08:37

HostFission · Accepted Answer · 2017-09-13T08:40:48.113

1

The 2nd parameter to date takes seconds since epoch. Just add 5 weeks in seconds to the time, ie:

$newdate = date($format, strtotime($quote_start_date) + (5 * 7 * 24 * 60 * 60));

Or just use the constant value "3024000"

$newdate = date($format, strtotime($quote_start_date) + 3024000);

edited Sep 13 '17 at 08:40

answered Sep 13 '17 at 08:33

HostFission

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kinggs · Answer 2 · 2017-09-13T08:41:14.607

1

The first parameter of date expects a format for your outputted date string. I think you're looking for the following:

$quote_start_date = $job['quote_authorised'];
$newdate = date("Ymd", strtotime('+5 weeks', strtotime($quote_start_date)));

The more efficient approach would be to use a fixed value for the number of seconds in a week and not rely on PHP parsing an additional strtotime function:

$quote_start_date = $job['quote_authorised'];
$newdate = date("Ymd", strtotime($quote_start_date) + 3024000);

edited Sep 13 '17 at 08:41

answered Sep 13 '17 at 08:34

kinggs

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This is extremely ineffecient, you are asking PHP to parse '+5 weeks' which will just return a constant value of `3024000`. Just add 3024000 to the first `strtotime` call. – HostFission Sep 13 '17 at 08:38

score 0 · Answer 3 · answered Sep 13 '17 at 08:36

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Its a demo :

 $date = new Date();
 $nextDate = new Date($date.setTime( $date.getTime() + 1 * 86400000 ));
 // here 1 is number of day .

answered Sep 13 '17 at 08:36

Minar Mnr

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"add weeks to a date", not add weeks to the current time. – HostFission Sep 13 '17 at 08:36

Adding days/weeks to formatted date

3 Answers3