I dont understand how to do the manuall installation from here
to make a HTML conde and add contacts using PHP.
Can you please help me?
Thank you for reaching out to Constant Contact's API Support.
That document gives you steps on how to install our PHP SDK. It does not have any information on writing your own HTML.
Are you having problems installing the library itself? If so what error messages are you receiving during the install process?
View API documentation, code samples, get your API key.