capturing textbox data

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I have a textbox, where I will fill user_id. And then on submission of that, the same page gets loaded passing the value of the textbox. And at last I need to fire some query to show relevant recordset in an HTML table format. Please help.. very argent suppose i have table :users; attributes1):user_id            2):user_name and id:primary_key how i will write simple view and controller with respect to user_id..