Examples of code. Learn more about 3D Secure https://developers.braintreepayments.com/guides/3d-secure/overview

• index_javascript_v2_sdk.php contains 3D secure integration with custom fields, used JavaScript v2 SDK on client side
• index_javascript_v3_sdk.php contains 3D secure integration with hosted fields, used JavaScript v3 SDK on client side
• index_3ds_2_javascript_v3_sdk.php contains 3D secure 2.0 integration with hosted fields, used JavaScript v3 SDK on client side

• JavaScript v2 SDK
• JavaScript v3 SDK

• PHP

composer install

• jQuery 3.3.*
• PHP Braintree library 3.39.*