PHP SESSIONベースの超使いやすいショッピングカー類

<?php 
session_start();
/*
 *   session shopcart 
 * caroltc 
 * [email protected]
 * 2014/08/26
 * */

class Shopcart{
	/*
	 * template   
	 * $shopcart = array(0=>array('goodsid'=>'','title'=>'','nums'=>'','price'=>''));
	*/
	/*        */
	public static function addGoodsToShopcart($goodsdata){
		$session_shopcart = Shopcart::getShopcart();
		if(count($session_shopcart)>0){
			/*        */
			for($i=0;$i<count($session_shopcart);$i++){
				if($session_shopcart[$i]['goodsid']==$goodsdata['id']){
					$session_shopcart[$i]['nums']++;
					$_SESSION['SJ_SHOPCART'] = serialize($session_shopcart);
					return ;
				}
			}
			$session_shopcart[count($session_shopcart)]=array('goodsid'=>$goodsdata['id'],'title'=>$goodsdata['title'],'nums'=>1,'price'=>$goodsdata['price']);
			$_SESSION['SJ_SHOPCART'] = serialize($session_shopcart);
		}else{
			$session_shopcart[count($session_shopcart)]=array('goodsid'=>$goodsdata['id'],'title'=>$goodsdata['title'],'nums'=>1,'price'=>$goodsdata['price']);
			$_SESSION['SJ_SHOPCART'] = serialize($session_shopcart);
		}
	}
	
	/*     */
	public static function getShopcart(){
		if(!empty($_SESSION['SJ_SHOPCART'])){
			return unserialize($_SESSION['SJ_SHOPCART']);
		}else{
			$shopcart = array();
			$_SESSION['SJ_SHOPCART'] = serialize($shopcart);
			return $shopcart;
		}
	}
	
	
	/*           */
	public static function getShopcartNums(){
		if(!$_SESSION['SJ_SHOPCART']){
			return 0;
		}else{
			$session_shopcart = Shopcart::getShopcart();
			$n=0;
			for($i=0;$i<count($session_shopcart);$i++){
				$n += $session_shopcart[$i]['nums'];
			}
			return $n;
		}
	}
	
	/*           */
	public static function getShopcartPrice(){
		if(!$_SESSION['SJ_SHOPCART']){
			return 0;
		}else{
			$session_shopcart=Shopcart::getShopcart();
			$m=0;
			for($i=0;$i<count($session_shopcart);$i++){
				$m += $session_shopcart[$i]['nums']*$session_shopcart[$i]['price'];
			}
			return $m;
		}
	}
	
	/*         */
	public static function setShopcartNumsAdd($goodsid){
		$session_shopcart=Shopcart::getShopcart();
		for($i=0;$i<count($session_shopcart);$i++){
			if($session_shopcart[$i]['goodsid']==$goodsid){
				$session_shopcart[$i]['nums']++;
				$_SESSION['SJ_SHOPCART'] = serialize($session_shopcart);
				return ;
			}
		}
	}
	
	/*          */
	public static function setShopcartNumsDel($goodsid){
		$session_shopcart=Shopcart::getShopcart();
		for($i=0;$i<count($session_shopcart);$i++){
			if($session_shopcart[$i]['goodsid']==$goodsid){
				$session_shopcart[$i]['nums']--;
				if($session_shopcart[$i]['nums']<=0){
					array_splice($session_shopcart,$i,1); //       0     
				}
				$_SESSION['SJ_SHOPCART'] = serialize($session_shopcart);
				return ;
			}
		}
	}
	
	/*         */
	public static function delShopcartGoods($goodsid){
		$session_shopcart=Shopcart::getShopcart();
		for($i=0;$i<count($session_shopcart);$i++){
			if($session_shopcart[$i]['goodsid']==$goodsid){
				array_splice($session_shopcart,$i,1); //    
				$_SESSION['SJ_SHOPCART'] = serialize($session_shopcart);
				return ;
			}
		}
	}
	
	/*     */
	public static function clearShopcart(){
		$_SESSION['SJ_SHOPCART'] = null;
	}
	
}
?>