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<?php function formatNumbers(NumberFormatter $formatter, ...$numbers) { foreach ($numbers as $number) { yield $formatter->format($number); } } $formatter = new NumberFormatter('en_US', NumberFormatter::DECIMAL); $format_iter = formatNumbers($formatter, 1234, 5678, 0123, 999, 1337); foreach ($format_iter as $formatted) { var_dump($formatted); }

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