Online PHP editor | output for lp2E7

<?php $canonicalIds = [ 'first', 'second', 'third', 'fourth', 'fifth', 'sixth', ]; $putContent = [ [ 'id' => 'fifth', 'value' => 55, ], [ 'id' => 'second', 'value' => 22, ], [ 'id' => 'fourth', 'value' => 44, ], [ 'id' => null, 'value' => 7, ], ]; $toCreate = array_filter($putContent, static function (array $item): bool { return null === $item['id']; }); $toUpdate = array_uintersect( $putContent, array_map(static function (string $id): array { return ['id' => $id]; }, $canonicalIds), static function (array $putItem, array $canonicalItem): int { return $putItem['id'] <=> $canonicalItem['id']; } ); $toDelete = array_diff($canonicalIds, array_column($toUpdate, 'id')); var_dump($toCreate, $toUpdate, $toDelete);