根據用戶購買過得商品進行推薦

要實現的功能是根據用戶購買過得商品進行推薦(猜你喜歡)
數據庫結構：標籤表label，商品標籤關聯表goods_label，商品表goods，商品sku表goods_sku，訂單表order，訂單商品快照表order_goods
實現原理：根據購買過商品的標籤，爲用戶推薦商品
活很少說，上代碼：

$memberid=$member->checktoken($param['token']);
$orderlist = $order->getorder(array('member_id'=>$memberid));
$list = array();
foreach ($orderlist as $value1) {
    $ordergoods = $order->getordergoods($value1['ordernumber']);
    foreach ($ordergoods as $value) {
        $labellist = array();
        $label_id = $that->labegoodsinfo(array('goods_id'=>$value['goods_id']));
        $labellist = explode(',', $label_id);
        $list = array_merge($list,$labellist);
        $list = array_unique($list);
        //$list即爲用戶購買過的商品標籤
       //格式:$list=array(0=>1,1=>3,2=>5,3=>4);
    }
}
$label_goods = $that->getgoodslabel();
    foreach ($label_goods as $k=>$value) {
        $goods_labelid = explode(',', $value['label_id']);
        $label_goods[$k]['count'] = count(array_intersect($goods_labelid,$list));
        if($label_goods[$k]['count'] == 0){
            unset($label_goods[$k]);
    }
}
    //$label_goods是符合$list標籤的商品以及count是符合的標籤個數
    //格式：$label_goods=array(0=>array('label_id'=>1,3,6,'goodsid'=>1,'count'=>2),
    //                        1=>array('label_id'=>1,3,5,'goodsid'=>2,'count'=>3)
    //                        )
$sort = array(
    'direction' => 'SORT_DESC', //排序順序標誌 SORT_DESC 降序；SORT_ASC 升序
    'field'     => 'count',       //排序字段
);
$arrSort = array();
foreach($label_goods AS $uniqid => $row){
    foreach($row AS $key=>$value){
        $arrSort[$key][$uniqid] = $value;
    }
}
if($sort['direction']){            
array_multisort($arrSort[$sort['field']],constant($sort['direction']),$label_goods);
}
//$label_goods從新排序，按照符合標籤數由多到少排序
//格式：$label_goods=array(0=>array('label_id'=>1,3,5,'goodsid'=>2,'count'=>3),
//                        1=>array('label_id'=>1,3,6,'goodsid'=>1,'count'=>2)
//                        )

最後只要根據goodsid去查詢出相關商品的信息便可。
沒有用到權重等相關算法，歡迎你們多提意見，讓我更好的進步！
愛你喲~