use Doctrine\Common\Collections\ArrayCollection; $userArrayCollection = new ArrayCollection($userObjects); $emailArrayCollection = $userArrayCollection->map(function($user) { return $user->getEmail(); });
use Doctrine\Common\Collections\ArrayCollection; $numberArrayCollection = new ArrayCollection([1, 2, 3, 4, 5]); $squareArrayCollection = $numberArrayCollection->map(function($number) { return $number * $number; });This will iterate through the $numberArrayCollection, and for each number, it will call the anonymous function that returns its square value. The resulting $squareArrayCollection will be another ArrayCollection containing the squared values of the original numbers. In summary, the ArrayCollection map method is provided by the doctrine.common.collections package library in PHP, and allows you to iterate through a collection and map its values to another collection based on a specific function. It can be useful in many situations when working with collections of objects or values.