PHP - 在内置函数中使用另一个数组中的特定元素填充数组

Question

I have a list of objects ( Cars ) so cars[0]->getId() is 12, cars[1]->getId is 25 etc. I want to fill an array with these IDs without using foreach

Currently I am doing it like this:

$carIds = array()
foreach ($cars as $car) {
   $carIds[] = $car->getId();
}

Is there an in built function to directly populate the array?

Answer 1

Use https://www.php.net/manual/en/function.array-map.php Sample code:

$result = array_map(function ($car) {
  return $car->getId();
}, $cars);