很多人在php空间中建立了一个网站后，都会因为网站后期需要，想要查看单个某一商品的订单信息或者是销售量。类似网站后台报表统计，有个这个的话，对于商品的销量和订单信息就有了一个很好的统计了。因此，要获取ecshop某个商品的订单信息或销量，可以把以下这段代码放到 ecshop程序文件的lib_main.php中： 1.统计某个下单商品的人数

function get_goods_ordernum($goods_id){
$sql = "select count(goods_number) from " . $GLOBALS['ecs']->table('order_goods') . " AS g ,".$GLOBALS['ecs']->table('order_info') . " AS o WHERE o.order_id=g.order_id and g.goods_id = " . $goods_id . " and o.order_status in(1,5) " ;//o.order_status=1 表示确认了的订单才算 
return $GLOBALS['db']->getAll($sql); 
}

注意：如果有3个人下单，数量是5 ，那返回结果是3 2.统计某个下单商品的销量，

function get_goods_ordernum($goods_id){
$sql = "select sum(goods_number) from " . $GLOBALS['ecs']->table('order_goods') . " AS g ,".$GLOBALS['ecs']->table('order_info') . " AS o WHERE o.order_id=g.order_id and g.goods_id = " . $goods_id . " and o.order_status in(1,5) " ;//o.order_status=1 表示确认了的订单才算 
return $GLOBALS['db']->getAll($sql); 
}

注意：如果有3个人下单，数量是5 ，那返回结果是5 3.统计某个商品商品订单的详细信息，在制作相应ecshop商城模板时就可以用到这个数据

function get_goods_ordernum($goods_id){
$sql = "select * from " . $GLOBALS['ecs']->table('order_goods') . " AS g ,".$GLOBALS['ecs']->table('order_info') . " AS o WHERE o.order_id=g.order_id and g.goods_id = " . $goods_id . " and o.order_status in(1,5) " ;//o.order_status=1 表示确认了的订单才算 
return $GLOBALS['db']->getAll($sql); 
}

order_status in(1,5) 1表示去人订单，5表示已分单 完整php代码

/*获取有效订单信息*/
function sales_goods_order($goods_id){ 
$sql = "select * from " . $GLOBALS['ecs']->table('order_goods') . " AS g ,".$GLOBALS['ecs']->table('order_info') . " AS o WHERE o.order_id=g.order_id and g.goods_id = " . $goods_id . " and o.order_status in(1,5) " ;//o.order_status=1 1表示确认订单，5已分单
return $GLOBALS['db']->getAll($sql); 
}
/*获取某个商品有效订单 销量统计*/
function sales_goods_number($goods_id){ 
$arr = sales_goods_order($goods_id);
//return array_sum($arr['goods_number']);
foreach($arr as $k=>$v){
$val[] = $v['goods_number']; 
}
$count = array_sum($val);
if(!empty($count)){
return $count; 
}else{
return '0'; 
}
}

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