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function findWeekPeriod($yearweek){
$aPeriod = array();
$year = substr($yearweek,0,4);
$week = substr($yearweek,4,2);
$startDay = Mon;
$endDay = Sun;
$startdate = strtotime('+' . $week . ' week',mktime(0,0,0,1,1,$year));
$enddate = $startdate;
while(date("D",$startdate) != $startDay){
$startdate = mktime(0,0,0,date("m",$startdate),date("d",$startdate)-1, date("Y",$startdate));
}
while(date("D",$enddate) != $endDay){
$enddate = mktime(0,0,0,date("m",$enddate),date("d",$enddate)+1, date("Y",$enddate));
}
return array('start' => date('l d/m/y', $startdate),
'end' => date('l d/m/y', $enddate));
return $aPeriod;
}