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PHP class to generate and verify Google Authenticator 2-factor authentication
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README.md

README.md

Google Authenticator PHP class

This PHP class can be used to interact with the Google Authenticator mobile app for 2-factor-authentication. This class can generate secrets, generate codes, validate codes and present a QR-Code for scanning the secret.

For a secret installation you have to make sure that used codes cannot be reused (replay-attack).

Usage:

See example files

php example1.php
Secret is: OQB6ZZGYHCPSX4AK

Google Charts URL for the QR-Code: https://www.google.com/chart?chs=200x200&chld=M|0&cht=qr&chl=otpauth://totp/infoATphpgangsta.de%3Fsecret%3DOQB6ZZGYHCPSX4AK

Checking Code '848634' and Secret 'OQB6ZZGYHCPSX4AK':
OK

ToDo:

  • ??? What do you need?

Notes:

If you like this script or have some features to add: contact me, visit my blog, fork this project, send pull requests, you know how it works.

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