Multiselect Checkbox Storage

//this is the code which i used in my _form where i am selcting questions in my multiselect checkbox and i actually want it like if i select 2 checkboxes at a time then that two values will get stored in my database where i use this field as varchar???

<?php $data= CHtml::listData(QuestionBank::model()->findAll(), ‘id’, ‘question’);

&#036;this-&gt; widget('ext.EchMultiselect.EchMultiselect', array(


'model' =&gt; &#036;model,


'dropDownAttribute' =&gt; 'Questions',     


'data' =&gt; &#036;data,


'dropDownHtmlOptions'=&gt; array(


    'style'=&gt;'width:378px;',


	),


	'options' =&gt; array( 


	        'height'=&gt;175,

‘minWidth’=>22,

‘height’=>25,

‘checkAllText’=>Yii::t(‘application’,‘Check all’),

‘uncheckAllText’=>Yii::t(‘application’,‘Uncheck all’),

‘noneSelectedText’=>Yii::t(‘application’,‘Select an Option’),

‘selectedText’=>Yii::t(‘application’,’# selected’),

‘selectedList’=>false,

‘show’=>’’,

‘hide’=>‘true’,

‘autoOpen’=>false,

‘multiple’=>true,

‘classes’=>’’,

‘position’=>array(),

‘header’=>true,

            // set this to true, if you want to use the Filter Plugin


            'filter'=&gt;false,


    ),

));

?>

My controller code:-

public function actionCreate()

{


	&#036;model=new Test;





	// Uncomment the following line if AJAX validation is needed


	// &#036;this-&gt;performAjaxValidation(&#036;model);





	if(isset(&#036;_POST['Test']))


	{


		&#036;model-&gt;attributes=&#036;_POST['Test'];


		if(&#036;model-&gt;save())


			&#036;this-&gt;redirect(array('view','id'=&gt;&#036;model-&gt;id));		


	}


	


	&#036;this-&gt;render('create',array(


		'model'=&gt;&#036;model,


	));


}

what code should i write in my controller?