Get previous weekday from sql date string in PHP

Question

I have a date string in sql format (eg 2017-08-05 ) and will like to convert it to get the previous weekday.

I know that there is the strtotime method where I can get the previous weekday from a specific date, such as:

date("Y m d",strtotime("-2 Weekday", strtotime("2017-08-05")));

Is there a better (prettier) way to do this? Or is this the PHP way?

Answer 1

By using Carbon

Carbon::parse('2017-08-05')->previousWeekday()

Or if you want sameway

Carbon::parse('2017-08-05')->subWeekday(2)->toDateString()

Answer 2

只需调用strtotime即可达到相同的目的：

date("Y m d", strtotime("2017-08-05 -2 Weekday"))

Answer 3

Try this:

// create a new instance of DateTimeImmutable
$date = new \DateTimeImmutable('2017-08-05');

// create a one-day interval
$interval = new \DateInterval('P1D');

// subtract the interval, and keep doing that while the day before is not a weekday
do {
    $date = $date->sub($interval);
} while (5 < $date->format('N'));

echo $date->format('Y-m-d');

For reference, see:

• http://php.net/manual/en/class.datetimeimmutable.php
• http://php.net/manual/en/class.dateinterval.php
• http://php.net/manual/en/function.date.php

For an example, see:

• https://3v4l.org/aT6Zj

Answer 4

you can create a carbon

carbon::parse('2012-08-05')->previousWeekday();

No better way then this...