Online PHP editor | refs for cYSUR

<?php $data = [ // ['order' => null, 'seriesId' => 2], // ['order' => 0, 'seriesId' => 1], ]; function validateOrderUniqueness(array $data) { $orders = array_filter(array_column($data, 'order')); $uniqueOrders = array_unique($orders); if ($orders !== $uniqueOrders) { throw new \Exception('validateOrderUniqueness fail'); } } function validateSeriesUniqueness(array $data) { $seriesIds = array_column($data, 'seriesId'); $uniqueSeriesIds = array_unique($seriesIds); if ($seriesIds !== $uniqueSeriesIds) { throw new \Exception('validateSeriesUniqueness fail'); } } $existing = [1, 2, 3]; validateOrderUniqueness($data); validateSeriesUniqueness($data); if (count(array_diff($existing, $seriesIds)) > 0) { $this->error(self::MISSING_ORDER_OF_SERIES); } if (count(array_diff($seriesIds, $existing)) > 0) { $this->error(self::NON_EXISTING_SERIES); }