计算回头率步骤

public function probability() {		global $_INPUT;		$ret        = array();		$time	    = $_INPUT['date'] && preg_match('/^\d{4}-\d{2}\-\d{2}$/', $_INPUT['date']) ? strtotime($_INPUT['date']) : strtotime('today');		$today      = $time;          //该天时间头		$tomorrow   = $time + 86400;  //该天时间尾		$flag       = 1;              //是否进入比赛		$model      = Model::getInstance('logs.fixedlog');		$paymodel   = Model::getInstance('main.payment');		$stats      = array();		$num        = 0;              //连续一周回头人数		$option     = isset($_INPUT['app']) ? intval($_INPUT['app']) : 1;		$interval   = isset($_INPUT['period']) ? intval($_INPUT['period']) : 1; //时间区间一周		if($option == 1) {			for($i = 0;$i <= $interval;$i++) {		        $res  = $model->turnround($today,$tomorrow,$flag);  //获取该天参加比赛的会员		        $temp = array(); 		        foreach($res as $value){		        	$inmatch = isset($value['inmatch']) ? json_decode($value['inmatch']) : array();		            foreach($inmatch as $val) {		            	if(!in_array($val, $temp)) {	                        array_unshift($temp,$val);  //去掉该天重复参加比赛会员		            	}		            }		        }		        $i==0 ? $total = count($temp) : "";     		        $temp = array_fill_keys($temp, $i);  //把会员记录导入stats数组		        foreach($temp as $k=>$v) {		        	if(array_key_exists($k,$stats)) {   //如果stats数组里面存着该会员ID，则尾部追加该登陆的每日号	                    $stats[$k] = $stats[$k].",".$v;		        	} else {		        		$stats[$k] = $v;		        	}		        }		        $today    = $today - 86400;   //逐次改变每日号起止时间	            $tomorrow = $tomorrow - 86400;        		    }			$strlen = ($interval+1)*2-1;			foreach($stats as $v) {				if(isset($v)) {					strlen(trim($v)) == $strlen ? $num++ : $num;				}					}			$ret['turnround']['all']   = $stats;			$ret['turnround']['total'] = $total;			$ret['turnround']['stats'] = count($stats);			$ret['turnround']['num']   = $num;		} else {			$res  = $model->turnround($today,$tomorrow,$flag);  //获取该天参加比赛的会员			$temp = array(); 	        foreach($res as $value){	        	$inmatch = isset($value['inmatch']) ? json_decode($value['inmatch']) : array();	            foreach($inmatch as $val) {	            	if(!in_array($val, $temp)) {                        array_unshift($temp,$val);  //去掉该天重复参加比赛会员	            	}	            }	        }  	        foreach($temp as $k=>$v) {                $paystatus = $paymodel->hasCharge($v,$tomorrow,$today-1);                isset($paystatus) && $paystatus['num']<>0 ? $num++ : "";	        }            $ret['payrate']['all']   = $temp;            $ret['payrate']['total'] = count($temp);			$ret['payrate']['num']   = $num;		}		return $this->ret($ret);    }