Get next/previous ISO week and year in PHP

Question

我需要一个以ISO周和ISO年为参数并返回下一个ISO周和年的函数（以及返回前一个ISO周/年的函数）。

Answer 1

So answer for 4 day so i give it a shot:

<?php

// Start with Timstamp 0, else the seconds might be off
$x = new DateTime("1970-01-01 00:00:00");
$x->setISODate(2010, 2);
echo $x->format("Y-m-d H:i:s"); // 2010-01-11 00:00:00

$x->modify("+1 week");

echo $x->format("Y-m-d H:i:s"); // 2010-01-18 00:00:00

// Now for the next ISO Week
echo $x->format("Y W"); // 2010 03

Hope that helps, else let me know :)