Where to validate and test user input date, In the controller or the model?

Where to clean up/ validat开发者_开发技巧e/ verify the user input data? In the controller or the model?

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In controller.

Look at it this way: Your form will post to a controller function with the form data in $_POST variable. You validate the data in that function of the controller and do some DB inserts or updates. Then you show the success message as a view or in case of error a fail message.

See the form validation tutorial in CodeIgniter's user guide here.

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I'd go with the model so your validation can be reused. Models should handle the data and the controller should direct it to where it needs to go.

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The code that make the validation must be in the model, but the call to this code must be in the controller.

Something like this:

class MyAwesomeUserModel {
   public function isValid()
   {
       //some code to validate the user
   }
}

class MyUserController {
   public function myUserAction()
   {
      //some code to insert the input of the user in the model
      if($userModel->isValid()){
         //do nice things with the data and send some message/data to the view
      } else {
         //send 'nice' error messages to the view
      }
   }
}

This is just the way I use, may not be the best way, but it's the best fit in my application. And that's what matters, you should look for what best suits your application.