PHP计算当前连续天数

PHP计算当前连续天数

    $day_list = array(strtotime('2016-06-29'),strtotime('2016-06-28'),strtotime('2016-06-27'),strtotime('2016-06-22'));
    //$day_list = array('1467164018','1467100301','1466985253','1466901657','1466839901','1466839901','1466670876');
    
    $days = getContinueDay(array_unique($day_list));
    echo $days;
	
    function getContinueDay($day_list)
    {
	    //昨天开始时间戳
	    $beginYesterday=mktime(0,0,0,date('m'),date('d')-1,date('Y'));
	   
	    if($beginYesterday>$day_list[0]) $days = 0;
	    else $days = 1;
	    
	    $count = count($day_list);
	    for($i=0;$i<$count;$i++){
	        if($i<$count-1){
	            $res = compareDay($day_list[$i],$day_list[$i+1]);
	            if($res) $days++;
	            else break;
	         }
	    }
	    
	    return $days;
    }

    function compareDay($curDay,$nextDay)
    {
        $lastBegin = mktime(0,0,0,date('m',$curDay),date('d',$curDay)-1,date('Y',$curDay));
        $lastEnd   = mktime(0,0,0,date('m',$curDay),date('d',$curDay),date('Y',$curDay))-1;
        
        if($nextDay>=$lastBegin && $nextDay<=$lastEnd){
            return true;
        }else{
            return false;
        }
        
    }