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<?php function bin2ascii($input) { $hextab = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; $result = ''; for ($x=0; $x<strlen($input); $x++) { $result .= $hextab[ord($input[$x]) % 62]; } return $result; } $results = array(); for ($i = 0; $i < 10000; $i++) { $val = bin2ascii(random_bytes(2)); $val = substr($val, 0, 2); if (empty($results[$val])) { $results[$val] = 1; } else { $results[$val] = $results[$val] + 1; } } arsort($results); print_r($results);

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