CodeIgniter active record query to filter by month and year

I have a dropdown list which contain data as follows -

November 2016
December 2016

There is a filter button, after clicking on filter button I want to display data as per selected month and year. Date is stored in database table like-

2016-12-26 18:32:00

Here is what I have done so far:

ajax

$(document).on('click','#page_filter_btn',function(){
    var page_date_list=$('#page_date_list').val();
    $.ajax({
        url:base_url+'admin/disp_all_pages',
        type:'post',
        data:{page_date_list:page_date_list,action:'page_filter'},
        success:function(data){
            $('#disp_all_pages').html(data);
        }
    });
}); 

controller

public function disp_all_pages()
{
    $date = $this->input->post('page_date_list');
    $month = strtok($date,  ' ');
    echo $year = substr($date, strpos($date, " ") + 1); 
    $data = $this->admin_data->disp_filter_page($month,$year); //Send month and year to model 
}

Model

public function disp_filter_page($month,$year)
{  
    $this->db->select('p.post_type,p.ID, p.post_date, p.post_title, u.user_login');
    $this->db->from('sa_posts p,sa_terms t,sa_users u');
    $this->db->where('post_type','page');
    $this->db->where('u.ID=p.post_author');
    $this->db->group_by('p.ID');
    $query=$this->db->get();
    return $query->result();
} 

I just want to display data as per selected value in dropdown list.

First of all you need to convert month from string to numeric value like 11 instead of November. So code of disp_all_pages function should be like this:

$date = "November 2016";
$month = date('m', strtotime(strtok($date,  ' ')));
$year = substr($date, strpos($date, " ") + 1);

Now you can directly compare it with DB columns as answered by @Dannis:

public function disp_filter_page($month,$year)
{  
    $this->db->select('p.post_type,p.ID, p.post_date, p.post_title, u.user_login')
            ->from('sa_posts p,sa_terms t,sa_users u')
            ->where(array('post_type' => 'page', 'u.ID' => 'p.post_author', 'MONTH(p.post_date)' => $month, 'YEAR(p.post_date)' => $year))
            ->group_by('p.ID');
    $query = $this->db->get();
    return $query->result();
} 

Hope it will help.