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<?php preg_match_all('/^([a-z]{0,3})(\d{3})[-\s]?(\d{2})[-\s]?(\d{4})([0-9a-z]{0,3})$/i', 'ABC123121234ABC', $number); var_dump(vsprintf('%s%s-%s-%s%s', $number));

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44.8 ms | 402 KiB | 5 Q