Dynamic Input Values Doesn't Save In The Databsae With Codeigniter

I want letting user add dynamic inputs and save those values in the database. But with this code only one value save to the database. How can I save all values to the database ent

Solution 1:

function error(){
    if ($this->input->post('mytext')) { 
        $attain = $this->input->post('mytext', true);
        $data2=array(); //<-initialize
            foreach ($attain as $i => $a) { // need index to match other properties
                //append array
                $data2[] = array(
                'mytext' => $a,
                'projectname'=> $this->input->post('projectname'),
            );
            //for multiple entry in same table
            $this->db->insert_batch('projectem', $data2); 
            redirect('Select_ctrl2/ModalAddEmployeesProject');
        }
    }
  }