Online PHP editor | refs for f0GLc

<?php $value_from_database = '607826144232dad00b968f40e316a9cc7884007f'; // Value from column `key` in `two_factor_totpdevice` DB table function binaryChunk($binaryString, $bits) { $binaryString = chunk_split($binaryString, $bits, ' '); if (substr($binaryString, (strlen($binaryString)) - 1) == ' ') { $binaryString = substr($binaryString, 0, strlen($binaryString)-1); } return explode(' ', $binaryString); } function base32encode($string) { $alphabet = str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567='); if (strlen($string) == 0) { // Gives an empty string return ''; } // Convert string to binary $binaryString = ''; foreach (str_split($string) as $s) { // Return each character as an 8-bit binary string $binaryString .= sprintf('%08b', ord($s)); } // Break into 5-bit chunks, then break that into an array $binaryArray = binaryChunk($binaryString, 5); // Pad array to be divisible by 8 while (count($binaryArray) % 8 !== 0) { $binaryArray[] = null; } $base32String = ''; // Encode in base32 foreach ($binaryArray as $bin) { $char = 32; if (!is_null($bin)) { // Pad the binary strings $bin = str_pad($bin, 5, 0, STR_PAD_RIGHT); $char = bindec($bin); } // Base32 character $base32String .= $alphabet[$char]; } return $base32String; } $rnd = pack('H*', $value_from_database); $secret = base32encode($rnd); echo $secret;