Online PHP editor | output for B9Ne9

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lorem 08639825607391 JEMA","release of with type and QPfg9O963u33Y62Z 283302714334520328104339 also 607560510633695990900322 sheets and in scrambled WSCULVLTFACCROJOITHLOVUA unchanged 55D179W2tEvkBz202X64T centuries 2zeO4w6Xk type"] CWS; $strings = json_decode($strings, true); $matched = []; function rx_double(string $str, array &$matched) { if(preg_match_all('~\b[A-Z0-9]{4,20}\b~', $str, $matches)) { // Second round: Filter all that are A-Z only if($wanted = preg_grep('~^[A-Z]+$~', $matches[0], PREG_GREP_INVERT)) { // And remove duplicates: $wanted = array_unique($wanted); $matched[] = $wanted; } } } function rx_single(string $str, array &$matched) { if (preg_match_all('~\b(?=\S*\d)[A-Z\d]{4,20}\b~', $str, $m)) { $wanted = array_unique($m[0]); $matched[] = $wanted; } } for($i = 0; $i <= $iters; $i++) { foreach($strings as $str) { $func($str, $matched); } } $total = round(microtime(true) - $start, 3) . ' sec'; print_r(compact('func', 'iters', 'total'));