year_by_month.php

<?php
function  year_by_month($start=null,$end=null) {
        $data=array();
        $start=strtotime($start);
        if($end===null){
            $end=date("Y-m-d");
        }
        $end=strtotime($end);
        $m_start=date("Y",$start)*12+(int)date("m",$start);
        $m_end=date("Y",$end)*12+(int)date("m",$end);
        while ($m_start<=$m_end){
            $m=$m_start%12;
            $y=($m_start-$m)/12;
            if($m==0){
                $m=12;
		$y--;
            }
            $days=cal_days_in_month(CAL_GREGORIAN, $m, $y);
            $data[]=array('y'=>$y,'m'=>$m,'days'=>$days);
            $m_start++;
        }
  
        $info=array();
        foreach($data as $d){
            $y=$d['y'];
            if(!isset($info[$y])){
                $info[$y]=array();
            }
            $d['m']=  sprintf("%02d", $d['m']);
            $info[$y][]=array($d['y'].'-'.$d['m'].'-01',$d['y'].'-'.$d['m'].'-'.$d['days']);
        }
        $info[date("Y",$start)][0][0]=date("Y-m-d",$start);
        $info[date("Y",$end)][count($info[date("Y",$end)])-1][1]=date("Y-m-d",$end);
       
	
	$d=array();
	foreach($info as $y=>$rows){
		if(!isset($d[$y])){
			$d[$y]=array();
		}
		foreach($rows as $row){
			$m=(int)date("m",strtotime($row[0]));
			$d[$y][$m]=$row;
		}
	}
	
	 return ($d);
	
    }
?>