I need to create contact when someone signup with my application that is created with cakephp.
I need to know should I use php sdk or direct call to api and for both of them where should I get start from.
Thank you for reaching out to Constant Contact's API Support.
You can use our API which is a standard RESTful API that accepts HTTP requests. This means you can just make direct calls to the API if you are more comfortable with that. You can find our documentation here.
View API documentation, code samples, get your API key.