Libraries tagged by RFC 6238

A lightweight and secure PHP class for implementing TOTP two-factor authentication, compatible with Google Authenticator, Authy, and more.

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Standalone OTP and MFA primitives for PHP.

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Google Authenticator 2-factor authentication

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Multi-factor authentication for Laravel — TOTP compatible with Google Authenticator, Authy, and any RFC 6238 app.

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Lightweight PHP TOTP (RFC 6238) and Base32 (RFC 4648) generation/decoding for 2FA authentication

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Two-factor authentication module for the ez-php framework — RFC 6238 TOTP, QR code URLs, backup codes, and HTTP middleware

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TOTP (RFC 6238) / Asafe compatible 2FA helper.

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A PHP library for generating one time passwords according to RFC 4226 (HOTP Algorithm) and the RFC 6238 (TOTP Algorithm) and compatible with Google Authenticator

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Two Factor Authentication (2FA) for Laravel

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Coroutine-safe, zero-dependency HOTP/TOTP (RFC 4226 / RFC 6238) with provisioning URIs for the PHPdot ecosystem.

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NDT 2FA — TOTP (RFC 6238) for PHP with backup codes, otpauth URIs, and QR generation (SVG). Laravel & Symfony integrations included.

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Community-driven PHP library for generating OTPs (HOTP/TOTP), RFC-compliant and compatible with Google Authenticator.

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A PHP library for RFC 4226 and RFC 6238.

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Horde RFC 4226 HOTP and RFC 6238 TOTP Library

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Two-factor authentication (TOTP) plugin for Auth-Kit. RFC 6238 authenticator-app codes with encrypted secrets, confirm-before-activate, single-use hashed recovery codes, clock-skew window and replay protection. Zero dependencies.

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