Online PHP editor | refs for 0Xtli

<?php $array = [ (object)['key' => 'sample', 'startYear' => '2000', 'endYear' => '2015'], (object)['key' => 'second_sample', 'startYear' => '1985', 'endYear' => '1991'] ]; $result = []; foreach ($array as $object) { ['key' => $key, 'startYear' => $result[$key]['startYear'], 'endYear' => $result[$key]['endYear']] = (array)$object; } var_export($result); echo "\n---\n"; var_export( array_reduce( $array, function($result, $object) { ['key' => $key, 'startYear' => $result[$key]['startYear'], 'endYear' => $result[$key]['endYear']] = (array)$object; return $result; }, [] ) );