<?php $object1 = (object)['id' => 1, 'name' => 'one']; $object2 = (object)['id' => 2, 'name' => 'two']; $object3 = (object)['id' => 3, 'name' => 'three']; $objects = [$object1, $object2, $object3]; print_r(array_column($objects, 'id'));
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