PHP Codeigniter分页

Hello i am stuck on codeigniter pagination.I am getting total rows 6, per page showing 2 row.

I am getting pagination link {Page: 1,2,3} where 1 is not clickable.

On Clicking Page no:2 my link look like localhost/demo/index.php/home/press/?per_page=0/2 but i am getting error on sql

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '/2,2' at line 1

SELECT * FROM media where media_type = 'PRESS' AND id <> 0 ORDER BY id DESC LIMIT 0/2

Same Error,pagintaion link getting when i click on link : 3 I dont know how to fix this issue.I am sharing my code which i used on my controller,model and view.

My controller code:

function press() 
{
    $this->load->model('Home_model');
    $page= $this->input->get('per_page') ? $this->input->get('per_page') : 0;
    $this->load->library('Pagination');
    $data['page'] = $this->input->get('page');
    if($data['page'] == '') {
        $data['page'] = $config['per_page'] = '2'; // Per Page
    } else {
        $data['page'] = $config['per_page'] = $this->input->get('page');
    }
    $config['first_url']='0';
    $pageno = $this->input->get('per_page');
    if($pageno == ''){
        $pageno = '0';
    } 
    $url_to_paging = $this->config->item('base_url');
    $config['base_url'] = $url_to_paging.'home/press/?per_page='.$page;
    $return = $this->Home_model->pressdata($config['per_page'],$pageno, $data);

    $data['pressdata'] = $return['result']; // Get Two Row Data
    $config['total_rows'] = $return['count']; // Total Count 6

    $this->pagination->initialize($config);
    $this->load->view('press',$data);
}

Model :

function pressdata($pg_num, $offset, $content) 
{
    if($offset == ''){
        $offset = '0';
    }
    $sql = "SELECT * FROM  media where media_type = 'PRESS' AND id <> 0";
    if($pg_num!=0 || $pg_num!="")
    {
        $sql .= " ORDER BY id DESC LIMIT ".$offset.",".$pg_num;
    } 
    $query = $this->db->query($sql);
    $sql_couint = "SELECT * FROM  media where media_type = 'PRESS' AND id <> 0";
    $query1 = $this->db->query($sql_couint);
    $ret['result'] = $query->result();
    $ret['count']  = $query1->num_rows();
    return $ret;
} 

Try it like this

$this->load->library('pagination');
$this->load->model('Home_model');

$config['base_url'] = base_url().'home/press/;
$config['total_rows'] = 200;   // Total no of rows returned from the database table
$config['uri_segment'] = 3;    // It is the page no,used as offset in model
$offset = 0;

if ($this->uri->segment($config['uri_segment']) != "") {
    $offset = $this->uri->segment($config['uri_segment']);
}

$config['per_page'] = 20;      // you can change it as you want
$return = $this->Home_model->pressdata($config['per_page'],$offset, $data); 
$this->pagination->initialize($config);

In your model you can do something like this

function pressdata($per_page, $offset) {
    if($per_page !== '' && $offset !== '') {
        $this->db->limit($per_page, $offset);
    }
    //rest of your query
}  

Don't copy paste it though, I just wanted to give you an idea. Modify it, implement it according to your needs. Let me know if it worked. Go through CodeIgniter's pagination library for more detailed documentation.

Finally i found the way to solve this problem. Here are the final code for Controller, Model, View.

Controller Code :

  function press()
   {
    $this->load->library('pagination');
    $url_to_paging = $this->config->item('base_url'); // URL here (www.example.com)
    $config['base_url'] = $url_to_paging.'home/press/'; // www.example.com/home/press
    $config['per_page'] = '4'; // Per Page Data Show 4
    $data = array();
    $return = $this->Home_model->pressdata($config['per_page'],$this->uri->segment(3));
    $data['pressdata'] = $return['result'];
    $config['total_rows'] = $return['count'];
    $this->pagination->initialize($config);
    $this->load->view('press', $data);
    }

Model Code :

function pressdata($num, $offset) 
{
    if($offset == '')
    {
        $offset = '0';
    }
    $sql = "SELECT * FROM media where media_type = 'PRESS' AND id <> 0 ";
    if($num!='' || $offset!='')
    {
        $sql .= " order by id desc limit ".$offset.",".$num."";
    }
    $query = $this->db->query($sql);
    $sql_count = "SELECT * FROM media  WHERE media_type = 'PRESS' AND id <> 0";
    $query1 = $this->db->query($sql_count);
    $ret['result'] = $query->result_array();
    $ret['count']  = $query1->num_rows();
    return $ret;
}

View Page for pagination link :

    if($this->pagination->create_links()) {  ?>
       <div style="clear:both; border-top: solid 1px #e9ecf1;"></div>
         <div style="float:right;">
           <span class="pagination" style="margin:0px; border:none;">
                <?php echo $this->pagination->create_links(); ?>
           </span>
          </div>
    <?php } 

function pressdata($pg_num, $offset, $content) 
{
    if($offset == ''){
        $offset = '0';
    }
    $sql = "SELECT * FROM  media where media_type = 'PRESS' AND id => 0";
    if($pg_num!=0 || $pg_num!="")
    {
        $sql .= " ORDER BY id DESC LIMIT ".$offset.",".$pg_num;
    } 
    $query = $this->db->query($sql);
    $sql_couint = "SELECT * FROM  media where media_type = 'PRESS' AND id => 0";
    $query1 = $this->db->query($sql_couint);
    $ret['result'] = $query->result();
    $ret['count']  = $query1->num_rows();
    return $ret;
} 

<-------id should be greater and equal to zero----->