Laravel : array_push 在 collection->each() 迭代器中不起作用

Question

我对集合进行了分组并使用 each() 对其进行了迭代 function.Inside 每个函数我想将元素添加到某些 array.But 这不是 working.Any 想法？

$dataSet1 = [];

$appointments = [
         ['department' => 'finance', 'product' => 'Chair'],
         ['department' => 'marketing', 'product' => 'Bookcase'],
         ['department' => 'finance', 'product' => 'Desk'],
]; 
$groupData = collect($appointments)->groupBy('department');

$groupData->each(function ($item, $key) {
   Log::info($key); //Show correct output in log
   array_push($dataSet1, $key); //ERROR
   array_push($dataSet1, 'A');//ERROR
});

Laravel 版本：8.35.1

Answer 1

您需要将数组传递给函数 use:

$groupData->each(function ($item, $key) use (&$dataSet1) {
   Log::info($key); //Show correct output in log
   array_push($dataSet1, $key); //ERROR
   array_push($dataSet1, 'A');//ERROR
});

只要 $dataSet1 不是对象实例，就需要按引用传递 (&)。

Laravel : array_push 在 collection->each() 迭代器中不起作用

Laravel : array_push not working in collection->each() iterator

laravel

collections

each

array-push