Get the date of next monday, tuesday, etc

See strtotime()

strtotime('next tuesday');

You could probably find out if you have gone past that day by looking at the week number:

$nextTuesday = strtotime('next tuesday');
$weekNo = date('W');
$weekNoNextTuesday = date('W', $nextTuesday);

if ($weekNoNextTuesday != $weekNo) {
    //past tuesday
}

The question is tagged "php" so as Tom said, the way to do that would look like this:

date('Y-m-d', strtotime('next tuesday'));

For some reason, strtotime('next friday') display the Friday date of the current week. Try this instead:

//Current date 2020-02-03
$fridayNextWeek = date('Y-m-d', strtotime('friday next week'); //Outputs 2020-02-14

$nextFriday = date('Y-m-d', strtotime('next friday'); //Outputs 2020-02-07

You can use Carbon library.

Example: Next week friday

Carbon::parse("friday next week");

PHP 7.1:

$next_date = new DateTime('next Thursday');
$stamp = $next_date->getTimestamp();

PHP manual getTimestamp()

Sorry, I didn't notice the PHP tag - however someone else might be interested in a VB solution:

Module Module1

    Sub Main()
        Dim d As Date = Now
        Dim nextFriday As Date = DateAdd(DateInterval.Weekday, DayOfWeek.Friday - d.DayOfWeek(), Now)
        Console.WriteLine("next friday is " & nextFriday)
        Console.ReadLine()
    End Sub

End Module

If I understand you correctly, you want the dates of the next 7 days?

You could do the following:

for ($i = 0; $i < 7; $i++)  
  echo date('d/m/y', time() + 86400 * $i);

Check the documentation for the date function for the format you want it in.

The PHP documentation for time() shows an example of how you can get a date one week out. You can modify this to instead go into a loop that iterates a maximum of 7 times, get the timestamp each time, get the corresponding date, and from that get the day of the week.