<?php $original = []; foreach (range(1, 20_000) as $iteration) { $original[] = [ 'id' => str_repeat("{$iteration}.", 4), 'name' => 'name', ]; } var_dump( array_reduce( $original, static function (array $result, array $item): array { if (str_starts_with($item['id'], '11')) { $result[] = $item; } return $result; }, [] ) );
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