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<?php function grange($from, $to) { for ($i = $from; is_infinite($to) ?: $i <= $to; $i++) { yield $i; } } foreach (grange(1, INF) as $element) { if ($element > 20) { break; } echo $element."\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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