Find weekly periods (starting on a Monday) for a month

Question

I\'m trying to find the weekly periods for a given month and year. Dates should start on a Monday and end on a Sunday. If the 1st of the month is a Sunday (Ex May 2011), it

Answer 1

this works perfect!!! phpfiddle here

';
foreach ($weeks as $week){
   echo fDate($week['start']).' '.fDate($week['end']).'
';
}
echo 'To: '.fDate($end).'
';

/*   outputs this:
From: Thu 2012-09-06
Thu 2012-09-06 Sun 2012-09-09
Mon 2012-09-10 Sun 2012-09-16
Mon 2012-09-17 Sun 2012-09-23
Mon 2012-09-24 Wed 2012-09-26
To: Wed 2012-09-26
*/


// $start and $end must be unix timestamps (any range)
//  returns an array of arrays with 'start' and 'end' elements set 
//  for each week (or part of week) for the given interval
//  return values are also in timestamps
function generateweeks($start,$end){
    $ret = array();
    $start = E2D($start);
    $end = E2D($end);

    $ns = nextSunday($start);

    while(true){
        if($ns>=$end) {insert($ret,$start,$end);return $ret;}
        insert($ret,$start,$ns);
        $start = $ns +1;
        $ns+=7;
    }
}



// helper function to append the array and convert back to unix timestamp
function insert(&$arr, $start, $end){$arr[] = array('start'=>D2E($start), 'end'=>D2E($end));}
// recives any date on CD format returns next Sunday on CD format
function nextSunday($Cdate){return $Cdate + 6  - $Cdate % 7;}
// recives any date on CD format returns previous Monday on CD format // finaly not used here
function prevMonday($Cdate){return $Cdate      - $Cdate % 7;}   
// recives timestamp returns CD
function E2D($what){return floor($what/86400)+2;}     // floor may be optional in some circunstances
// recives CD returns timestamp
function D2E($what){return ($what-2)*86400;}          // 24*60*60
// just format the timestamp for output, you can adapt it to your needs
function fDate($what){return date('D Y-m-d',$what);}