在php的where子句中使用数组

我有一个数组

$order\u mealsInfo\u id

，其值如下

[{“膳食id”：“33”}，{“膳食id”：“34”}]

“33”和“34”都有相同的值（商店名称、特许经营权id、订单日期时间），所以我只想获取这些值一次，这就是我使用distinct关键字的原因。我想在我的查询中使用

$order\u MEALINFO\u id

，我的查询是：

    $get_franchise_info="Select distinct store_name,franchise_id,order_datetime from order_main where id 
IN (".implode(',',$order_mealsInfo_ids['meal_id']).")";

但它给出了这样一个错误：

注意：第94行的C:\xampp\htdocs\learning\service\get\u pending\u orders\u news.php中未定义的索引：fine\u id

警告：内爆（）：在第94行的C:\xampp\htdocs\learning\service\get\u pending\u orders\u news.php中传递的参数无效

---

在您的例子中，

$order\u mealsInfo\u id

不是PHP数组。它是一个包含JSON数组的字符串

请试试这个：

$order_mealsInfoJSON = '[{"meal_id":"33"},{"meal_id":"34"}]';
$order_mealsInfoArr = json_decode($order_mealsInfoJSON); // Convert JSON string to PHP array containing objects.

$order_mealsInfoIds = array();
foreach($order_mealsInfoArr as $order_mealsInfo) {
    $order_mealsInfoIds[] = $order_mealsInfo->meal_id;
}

$get_franchise_info="Select distinct store_name,franchise_id,order_datetime from order_main where id IN (".implode(',', $order_mealsInfoIds).")";

[{“膳食id”：“33”}，{“膳食id”：“34”}]这不是数组这是json

您需要将json转换为数组

`$array = json_decode($json);
$mapedarray = array_map('current',$array);
$data = implode(',',$mapedarray);
echo $data;
`

所以你得到33,34

`
 $get_franchise_info="Select distinct store_name,franchise_id,order_datetime from order_main where id 
IN (".implode(',',$mapedarray).")";
`

或

用这个

    $data_jsn = '[{"meal_id":"33"},{"meal_id":"34"}]';
    $data = json_decode($data_jsn,true);
    $data_val = array_map(function($element) {
      return $element['meal_id'];
    }, $data);

    $get_franchise_info="Select distinct store_name,franchise_id,order_datetime from order_main where id 
    IN (".implode(',',$data_val).")";

    $data_jsn = '[{"meal_id":"33"},{"meal_id":"34"}]';
    $data = json_decode($data_jsn,true);
    $data_val = array_map(function($element) {
      return $element['meal_id'];
    }, $data);

    $get_franchise_info="Select distinct store_name,franchise_id,order_datetime from order_main where id 
    IN (".implode(',',$data_val).")";