title: Where_in in codeigniter
body: <p>I'm using Codeigniter 3 to build a website. But now I have an issue with get data from database.</p>
  
  <p>this is my Model:</p>
  
  <pre><code>public function Get($arr_condition = null)
  {
       if(!is_null($arr_condition))
       {
          $this-&gt;db-&gt;where($arr_condition);
       }
       $query = $this-&gt;db-&gt;get('cus');
       if($query-&gt;num_rows()&gt;0)
       {
          return $query-&gt;result_array();
       }
       return false;
  }
  </code></pre>
  
  <p>In Controller, I use an array ($arr_condition) to get list conditional:</p>
  
  <pre><code>$arr_condition['Cus_team'] =  1;
  $arr_condition['Cus_user != '] =  2;
  $arr_condition['Cus_phone LIKE'] = 09900000;
  $arr_condition['Cus_role &gt;'] = 1;
  
  $result = $this-&gt;M_cus_dal-&gt;Get($arr_condition);
  </code></pre>
  
  <p>My code working perfectly until I need a condition with Where_in, I tried:</p>
  
  <pre><code>$arr_condtion['Cus_id IN']= array('1,2,3');
  </code></pre>
  
  <p>But, It not work.</p>
  
  <p>Please give me an ideal to resolve this issue.</p>