PHP

Generate TOTP using Base32 Secret (6 Digits, Time-based, 30-second period)

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Generates a 6-digit time-based TOTP code using a base32 secret with a 30-second time period. Chilkat2 PHP

<?php

use Chilkat2\Crypt2;
use Chilkat2\StringBuilder;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
//
$crypt = new Crypt2();

// Base32 secret key:
$secretKey = 'oebf ytfl qmzb p4xd 2ztf zyz4 hjrw 3uyo';

$sbKey = new StringBuilder();
$sbKey->Append($secretKey);

// Remove SPACE chars.
$numRemoved = $sbKey->Replace(' ', '');

// Note: A new token is generated every 30 seconds.  You must generate within the same 30 second interval to get the same result.

// Generate 6 digits.
$numDigits = 6;
// 30 second time period.
$timePeriod = 30;
echo 'Your token is: ', $crypt->Totp($sbKey->GetAsString(), 'base32', '0', '', $timePeriod, $numDigits, -1, 'sha1'), "\n";