PHP: Get start and end dates of a week from date(‘W’) [转]

 

PHP: Get start and end dates of a week from date(‘W’)

 

First off, from the PHP.net Manual, the ‘W’ inside the date() function returns the week number for a year.

Week
ISO-8601 week number of year, weeks starting on Monday (added in PHP 4.1.0)
Example: 42 (the 42nd week in the year)

A quick example of date(‘W’)

<?php
//October 29, 2009 is my birthday
echo date('W', strtotime('2009-10-29'));
//OUTPUT: 44
//October 29 is the 44th week in the year 2009

//Here is the function to get the start and end dates given a week number:

function getWeekDates($year, $week, $start=true)
{
    $from = date("Y-m-d", strtotime("{$year}-W{$week}-1")); //Returns the date of monday in week
    $to = date("Y-m-d", strtotime("{$year}-W{$week}-7"));   //Returns the date of sunday in week
 
    if($start) {
        return $from;
    } else {
        return $to;
    }
    //return "Week {$week} in {$year} is from {$from} to {$to}.";
}

 

I did a couple of tests and so far the code worked okay. If you have a better way of doing it, post it below 

PS: I got some of the code from a PHP.net comment and could no longer find the source. If you know the source, contact me.