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<?php $string = "00 a 51 - a9"; $numbers = ""; $chars = ""; preg_match_all("/(\d*)(\D*)/", $string, $matches); //print_r($matches); foreach($matches as $match) { $numbers .= is_int($match) ? $match : ''; $chars .= !is_int($match) ? $match : ''; } var_dump($numbers); echo " "; var_dump($chars);

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54.42 ms | 402 KiB | 5 Q