<?php
function yearArray($year){
$range = array();
$start = strtotime($year.'-01-01');
$end = strtotime($year.'-12-31');
do{
$range[] = date('Y-m-d',$start);
$start = strtotime("+ 1 day",$start);
}while ( $start<=$end );
return $range;
}
print_r(yearArray(2011));
?>