TP6数据集转数组的方法：九阴真经之collapse式

淡淡的烟草味﹌ 2023-06-15 11:11 7阅读 0赞

使用Arr::collapse($array)，这种方法可以将Collection数据集转化为数组。  
例如我们现在有这样一个未经过滤的数据集：

$resultData = $this->queryPagingData($params,$page,$offset);
     halt(resultData );
     如下：
    
    
    array:4 [
      "code" => "B0cloudServiceIndex"
      "msg" => "查询,成功。"
      "data" => Collection { #119
        #items: array:10 [
          0 => array:11 [
            "id" => 16
            "name" => "SF"
            "Accesskey" => "SDFsdfsdf23"
            "Secretkey" => "ssf322r"
            "url" => "fsfsf"
            "Bucket" => "4"
            "describe" => "fsfs"
            "status" => 0
            "is_del" => 0
            "create_time" => 1574163829
            "update_time" => "2019-11-19 19:43:49"
          ]
          1 => array:11 [
            "id" => 15
            "name" => "SF"
            "Accesskey" => "SDFsdfsdf23"
            "Secretkey" => "ssf322r"
            "url" => "fsfsf"
            "Bucket" => "4"
            "describe" => "fsfs"
            "status" => 0
            "is_del" => 0
            "create_time" => 1574163746
            "update_time" => "2019-11-19 19:42:26"
          ]

主要看data项，这一项现在还是Collection 对象呢！  
那么使用以下函数，

$a = Arr::collapse($resultData);
    halt($a);
    
    打印结果如下：
    
    array:13 [
      0 => array:11 [
        "id" => 16
        "name" => "SF"
        "Accesskey" => "SDFsdfsdf23"
        "Secretkey" => "ssf322r"
        "url" => "fsfsf"
        "Bucket" => "4"
        "describe" => "fsfs"
        "status" => 0
        "is_del" => 0
        "create_time" => 1574163829
        "update_time" => "2019-11-19 19:43:49"
      ]
      1 => array:11 [
        "id" => 15
        "name" => "SF"
        "Accesskey" => "SDFsdfsdf23"
        "Secretkey" => "ssf322r"
        "url" => "fsfsf"
        "Bucket" => "4"
        "describe" => "fsfs"
        "status" => 0
        "is_del" => 0
        "create_time" => 1574163746
        "update_time" => "2019-11-19 19:42:26"
      ]

从以上示例中可以看到数据集已经转为了数组了。

那么这个函数到底是怎么实现的呢？请看源码：

/** * Collapse an array of arrays into a single array. * * @param array $array * @return array */
        public static function collapse($array)
        { 
            $results = [];
    
            foreach ($array as $values) { 
                if ($values instanceof Collection) { 
                    $values = $values->all();
                } elseif (!is_array($values)) { 
                    continue;
                }
    
                $results = array_merge($results, $values);
            }
    
            return $results;
        }

此函数最终调用的 是Collection中的all方法，所以实际上我们也可以直接这样去写：

halt($resultData['data']->all());//当前类已经继承了Collection类

public function all(): array
    {
        return $this->items;
    }

最终获得的结果跟 上述是一样的 。