how is send one Content on the site and display that on facebook or twitter ?
send one content(on the my site) and display in two places(my site and facebook)
for display to facebook, it is send Handheld or automatic?
I'm not sure I follow, but you can use the API provided by Twitter and Facebook to submit content.
Follow this for Facebook:
Facebook SDK: Auto Post to Facebook | PHP | Damn Semicolon;
This for Twitter.
Twitter API Tutorial: Hello Twitter OAuth with PHP
It's a lot more difficult than it need be, especially the Facebook one which needs like 4 different tokens but following this I got it to work. Then you just need to call these functions and send the write info when you make a post.