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