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

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

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// 
$crypt = new CkCrypt2();

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

$sbKey = new CkStringBuilder();
$success = $sbKey->Append($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;
print 'Your token is: ' . $crypt->totp($sbKey->getAsString(),'base32','0','',$timePeriod,$numDigits,-1,'sha1') . "\n";

?>