CODEWITHSUNDEEP
phpdate
lock
lock

Reputation: 6614

how to get the date of last week's (tuesday or any other day) in php?

I think its possible but i cant come up with the right algorithm for it.

What i wanted to do was:

If today is monday feb 2 2009, how would i know the date of last week's tuesday? Using that same code 2 days after, i would find the same date of last week's tuesday with the current date being wednesday, feb 4 2009.

Upvotes: 20

Views: 35396

Answers (8)

Hologos
Hologos

Reputation: 407

Do not use manual calculation, use DateTime object instead. It has proper implementation, takes into account leap years, yeap seconds, etc.

$today = new \DateTime();
$today->modify('tuesday last week');

The modify method modifies the date relative to it's state, so if you set the date to a different date, it calculates it relative to it.

$date = new \DateTime('2020-01-01');
echo $date->format('Y-m-d'); // 2020-01-01

$date->modify('tuesday last week');
echo $date->format('Y-m-d'); // 2019-12-24

Upvotes: 2

smo0f
smo0f

Reputation: 812

Most of these answers are either too much, or technically incorrect because "last Tuesday" doesn't necessarily mean the Tuesday from last week, it just means the previous Tuesday, which could be within the same week of "now".

The correct answer is:

strtotime('tuesday last week')

Upvotes: 24

Dipak Burnwal
Dipak Burnwal

Reputation: 1

<?php 
    $currentDay = date('D');
    echo "Today-".$today = date("Y-m-d");
    echo "Yesterday-".$yesterday = date("Y-m-d",strtotime('yesterday'));
    echo "Same day last week-".$same_day_last_week = date("Y-m-d",strtotime('last '.$currentDay));
?>

Upvotes: 0

Jack Sleight
Jack Sleight

Reputation: 17118

PHP actually makes this really easy:

echo strtotime('last Tuesday');

See the strtotime documentation.

Upvotes: 14

gregjor
gregjor

Reputation: 22912

// test: find last date for each day of the week
foreach (array('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun') as $day) {
    print $day . " => " . date('m/d/Y', last_dayofweek($day)) . "\n";
}

function last_dayofweek($day)
{
    // return timestamp of last Monday...Friday
    // will return today if today is the requested weekday
    $day = strtolower(substr($day, 0, 3));
    if (strtolower(date('D')) == $day)
        return strtotime("today");
    else
        return strtotime("last {$day}");
}

Upvotes: 0

russian
russian

Reputation:

Working solution:

$z = date("Y-m-d", strtotime("last Saturday"));
$z = (date('W', strtotime($z)) == date('W')) ? (strtotime($z)-7*86400+7200) : strtotime($z);
print date("Y-m-d", $z);

Upvotes: 3

russian
russian

Reputation:

you forgot strtotime for second argument of date('W', $tuesday) hmm.

convert $tuesday to timestamp before "$tuesday-7*86400+7200"

mde.

Upvotes: 0

cg.
cg.

Reputation: 3678

I know there is an accepted answer already, but imho it does not meet the second requirement that was asked for. In the above case, strtotime would yield yesterday if used on a wednesday. So, just to be exact you would still need to check for this:

$tuesday = strtotime('last Tuesday');
// check if we need to go back in time one more week
$tuesday = date('W', $tuesday)==date('W') ? $tuesday-7*86400 : $tuesday;

As davil pointed out in his comment, this was kind of a quick-shot of mine. The above calculation will be off by one once a year due to daylight saving time. The good-enough solution would be:

$tuesday = date('W', $tuesday)==date('W') ? $tuesday-7*86400+7200 : $tuesday;

If you need the time to be 0:00h, you'll need some extra effort of course.

Upvotes: 16

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