我需要按钮添加一周到一周，一个减少

Question

This code shows the week number

<?php 
    $week_number = date("W");
    echo "Week " . $week_number; 
?>

and this code shows the dates in that week

<?php
$week_number = date("W");
$year = date("Y");
for($day=1; $day<=7; $day++){
    echo "<td>";
    echo date('d M', strtotime($year."W".$week_number.$day))."
";
    echo "</td>";
}

Its for a week view calender and what i need is a next and prev button to skip to next week and go back to prev week.. PLease help i cant find a solution to add one week or decrease on week with buttons.

Answer 1

$last_week = (new DateTime('last week'))->format('d M');
$next_week = (new DateTime('next week'))->format('d M');

<kbd>Demo</kbd>

If you want to start from a different date the code wouldn't look much different:

$date      = $_GET['date']; // Sample value: 2014-08-19
$last_week = (new DateTime($date)->modify('last week'))->format('d M');
$next_week = (new DateTime($date)->modify('next week'))->format('d M');