商家列表隔2条插入广告

$adsList = ['ad_1','ad_2','ad_3','ad_4','ad_5','ad_6','ad_7','ad_8','ad_9','ad_10'];
$shopList = ['shop_1','shop_2','shop_3','shop_4','shop_5','shop_6','shop_7','shop_8','shop_9','shop_10'];
$newShopList=[];
if(!empty($shopList)){
    $newShopList=$shopList;
    $y=0;
    for($i=1;$i<=count($shopList);$i++) {
        if($i%2==0){
            if(!empty($adsList[$y])){
                $append=[
                    $adsList[$y]
                ];
                array_splice($newShopList, $i+$y, 0, $append);
            }
            $y++;
        }
    }
}