获取Ecshop各个属性的库存的简单方法

原理：从ecshop数据库提取各个属性的库存，放到一个函数里，然后用模板调用出来。 
需要修改的ecshop文件： 
1.主题模板goods.dwt 
2.includes下的lib_goods.php    
第一步：
修改goods.dwt  在294行左右， 

<!-- {foreach from=$spec.values item=value key=key} -->和    <!-- {/foreach} -->之间，增加（库存：{$value.product_number} {$goods.measure_unit}）    
第二步：
修改includes下的lib_goods.php  在625行/* 获得商品的规格 */中，修改为：

$sql = "SELECT a.attr_id, a.attr_name, a.attr_group, a.is_linked, a.attr_type, ". "g.goods_attr_id, g.attr_value, g.attr_price " . ",p.product_sn,p.product_number " . 'FROM ' . $GLOBALS['ecs']->table('goods_attr') . ' AS g ' . 'LEFT JOIN ' . $GLOBALS['ecs']->table('attribute') . ' AS a ON a.attr_id = g.attr_id ' . 'LEFT JOIN ' . $GLOBALS['ecs']->table('products') . ' AS p ON g.goods_attr_id = p.goods_attr ' . "WHERE g.goods_id = '$goods_id' " . 'ORDER BY a.sort_order, g.attr_price, g.goods_attr_id'; $res = $GLOBALS['db']->getAll($sql);  $arr['pro'] = array(); // 属性 $arr['spe'] = array(); // 规格 $arr['lnk'] = array(); // 关联的属性  foreach ($res AS $row) { $row['attr_value'] = str_replace("/n", '<br />', $row['attr_value']);  if ($row['attr_type'] == 0) { $group = (isset($groups[$row['attr_group']])) ? $groups[$row['attr_group']] : $GLOBALS['_LANG']['goods_attr'];  $arr['pro'][$group][$row['attr_id']]['name'] = $row['attr_name']; $arr['pro'][$group][$row['attr_id']]['value'] = $row['attr_value']; } else { $arr['spe'][$row['attr_id']]['attr_type'] = $row['attr_type']; $arr['spe'][$row['attr_id']]['name'] = $row['attr_name']; $arr['spe'][$row['attr_id']]['values'][] = array( 'label' => $row['attr_value'], 'price' => $row['attr_price'], 'format_price' => price_format(abs($row['attr_price']), false), 'id' => $row['goods_attr_id'], 'product_sn' => $row["product_sn"], 'product_number' => $row["product_number"]); }