Trello Integration same like bitbucket

I am looking for the script to embedded trello in one of my webpage by PHP, right now I am able to fetch data from REST API For Trello board and card but I want to use trello in iframe with private board and cards (Same like Bitbucket), for this we need to create an app and authorize user in trello app. you can let me know if you having the script ready for this so I can buy it or you can write that script and show me demo on your side and I will pay for the right thing. Thanks