Question

我无法区分何时对其中的数据进行响应以及何时没有响应。我正在使用Laravel 5.4与连接的模型和控制器。我的代码和我的模型一样：

public function scopeCheckForPrevious($verify)

{
  json_encode($query = \App\Address::where('address', 'like', '%'.$verify.'%')

  ->get());

  return $query;



}

这是我的控制器代码：

public function show()
    {
      $result = new Address;
      $check = $_POST['address'];

      $address = $result->scopeCheckForPrevious($check);

      print_r($address);

    }

当我打印结果时，当我有一个返回数据的$查询时，我就会这样做：

Illuminate \ Database \ Eloquent \ Collection Object（[items：protected] =＆gt; Array（[0] =＆gt; App \ Address Object（[fillable：protected] =＆gt;数组（[0] =＆gt;地址[1] =＆gt; city [2] =＆gt; state）[connection：protected] =＆gt; mysql [table：protected] =＆gt; [primaryKey：protected] =＆gt; id [keyType：protected] =＆gt; int [incrementing] =＆gt; 1 [with：protected] =＆gt; Array（）[perPage：protected] =＆gt; 15 [exists] =＆gt; 1 [wasRecentlyCreated] =＆gt; [attributes：protected] =＆gt;数组（ [id] =＆gt; 1 [地址] =＆gt; 1024 s主要st [city] =＆gt; corona [state] =＆gt; ca [created_at] =＆gt; 2017-05-15 01:45:28 [updated_at] =＆gt; 2017-05-15 01:45:28）[original：protected] =＆gt;数组（[id] =＆gt; 1 [地址] =＆gt; 1024 s主要st [city] =＆gt;电晕[状态] ] =＆gt; ca [created_at] =＆gt; 2017-05-15 01:45:28 [updated_at] =＆gt; 2017-05-15 01:45:28）[演员：受保护] =＆gt;数组（）[ date：protected] =＆gt; Array（）[dateFormat：protected] =＆gt; [appends：protected] =＆gt; Array（）[events：protected] =＆g吨; Array（）[observables：protected] =＆gt; Array（）[关系：受保护] =＆gt; Array（）[touches：protected] =＆gt; Array（）[timestamps] =＆gt; 1 [hidden：protected] =＆gt; Array（）[visible：protected] =＆gt; Array（）[guarded：protected] =＆gt;数组（[0] =＆gt; *））[1] =＆gt; App \ Address Object（[fillable：protected] =＆gt; Array（[0] =＆gt; address [1] =＆gt; city [2] =＆gt; state）[connection：protected] =＆gt; mysql [table：protected ] =＆gt; [primaryKey：protected] =＆gt; id [keyType：protected] =＆gt; int [incrementing] =＆gt; 1 [with：protected] =＆gt; Array（）[perPage：protected] =＆gt; 15 [ exists] =＆gt; 1 [wasRecentlyCreated] =＆gt; [attributes：protected] =＆gt;数组（[id] =＆gt; 4 [地址] =＆gt; 1024 s主要st。[city] =＆gt;日冕[州] =＆gt; ca [created_at] =＆gt; 2017-05-15 01:47:39 [updated_at] =＆gt; 2017-05-15 01:47:39）[original：protected] =＆gt;数组（[id] =＆gt; 4 [地址] =＆gt; 1024 s主要st。[city] =＆gt; corona [state] =＆gt; ca [created_at] =＆gt; 2017-05-15 01:47:39 [updated_at] =＆gt ; 2017-05-15 01:47:39）[casts：protected] =＆gt; Array（）[dates：protected] =＆gt; Array（）[dateFormat：protected] =＆gt; [appends：protected] =＆gt; Array（）[events：protected] =＆gt; Array（）[observables：protected] =＆gt; Array（）[relations：protected] =＆gt; Array（）[ touches：protected] =＆gt; Array（）[timestamps] =＆gt; 1 [hidden：protected] =＆gt; Array（）[visible：protected] =＆gt; Array（）[guarded：protected] =＆gt;数组（[0] =＆gt; *））））

当我返回一个没有响应的查询时，我就有了这个：

Illuminate \ Database \ Eloquent \ Collection Object（[items：protected] =＆gt; Array（））

我想制作一个if else语句并尝试检查$ address是否为NULL，如下所示：

public function show()
{
  $result = new Address;
  $check = $_POST['address'];

  $address = $result->scopeCheckForPrevious($check);



  if($address == NULL)
 {
    print_r($address);
  }

  else
  {
    echo "You have no responses";
  }

但它一直只响应else echo。

非常感谢任何有关此问题的帮助

Answer 1

尝试使用count()：

if( count($address) == 0)
{
    echo "You have no responses";
}

else
{
    print_r($address);
}

希望区分$ query查询响应与其中的数据以及$ query查询响应

1 个答案: