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<?php $examples = [ 'Sep 04-08', 'Sep 29-Oct 01', ]; $result = []; foreach ($examples as $example) { [$from, $to] = explode('-', $example, 2); var_export([$from, str_pad($to, 6, $from, STR_PAD_LEFT)]); echo "\n"; }

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47.78 ms | 402 KiB | 5 Q