Codeigniter 3.x Ajax Pagination - php

Question

Hello (it's my first post) I post because i really need help for paginate the results by category on codeigniter.
When i click on the link generated, the page loads to infinity. This pagination is ok on the index page for all results. But i need paginate by category.
thank you very very much in advance for you're help.
The Controler:
class Blog extends CI_Controller {
function __construct() {
parent::__construct();
$this->load->model(array('Blog_model'));
$this->load->library('Ajax_pagination');
$this->perPage = 3;
}
function category($category_id)//category page
{
$data = array();
//total rows count
$totalRec = count($this->Blog_model->getRowsByCat($category_id));
//pagination configuration
$config['target'] = '#postwrap';
$config['base_url'] = base_url().'blog/category/'.$category_id.'/ajaxPaginationCat';
$config['total_rows'] = $totalRec;
$config['per_page'] = $this->perPage;
$this->ajax_pagination->initialize($config);
//get the posts data
$data['posts'] = $this->Blog_model->getRowsByCat($category_id,array('limit'=>$this->perPage));
//
$data['main_content'] = "blog/category";
$this->load->view('template',$data);
}
function ajaxPaginationCat($category_id){
$page = $this->input->post('page');
if(!$page){
$offset = 0;
}else{
$offset = $page;
}
//total rows count
$totalRec = count($this->Blog_model->getRowsByCat($category_id));
//pagination configuration
$config['target'] = '#postwrap';
$config['base_url'] = base_url().'blog/category/'.$category_id.'/ajaxPaginationCat';
$config['total_rows'] = $totalRec;
$config['per_page'] = $this->perPage;
$this->ajax_pagination->initialize($config);
//get posts data
$data['posts'] = $this->Blog_model->getRowsByCat($category_id,array('start'=>$offset,'limit'=>$this->perPage));
//load the view
$this->load->view('blog/ajax-pagination-data', $data, false);
}
The Model:
/*
* get rows from the posts table
*/
function getRowsByCat($category_id,$params = array()){
$this->db->select('*');
$this->db->from('blog_posts');
$this->db->order_by('post_id','desc');
if(!empty($category_id)){
$this->db->where('category_id',$category_id);
}
//set start and limit
if(array_key_exists("start",$params) && array_key_exists("limit",$params)){
$this->db->limit($params['limit'],$params['start']);
}elseif(!array_key_exists("start",$params) && array_key_exists("limit",$params)){
$this->db->limit($params['limit']);
}
//get records
$query = $this->db->get();
//return fetched data
return ($query->num_rows() > 0)?$query->result_array():FALSE;
}
Library:
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
* Pagination Class
*
* #package CodeIgniter
* #link http://codeigniter.com/user_guide/libraries/pagination.html
*
* Modified by CodexWorld.com
* #Ajax pagination functionality has added with this library.
* #It will helps to integrate Ajax pagination with loading image in CodeIgniter application.
* #TutorialLink http://www.codexworld.com/ajax-pagination-in-codeigniter-framework/
*/
class Ajax_pagination{
var $base_url = ''; // The page we are linking to
var $total_rows = ''; // Total number of items (database results)
var $per_page = 10; // Max number of items you want shown per page
var $num_links = 2; // Number of "digit" links to show before/after the currently viewed page
var $cur_page = 0; // The current page being viewed
var $first_link = 'First';
var $next_link = '»';
var $prev_link = '«';
var $last_link = 'Last';
var $uri_segment = 3;
var $full_tag_open = '<div class="pagination">';
var $full_tag_close = '</div>';
var $first_tag_open = '';
var $first_tag_close = ' ';
var $last_tag_open = ' ';
var $last_tag_close = '';
var $cur_tag_open = ' <b>';
var $cur_tag_close = '</b>';
var $next_tag_open = ' ';
var $next_tag_close = ' ';
var $prev_tag_open = ' ';
var $prev_tag_close = '';
var $num_tag_open = ' ';
var $num_tag_close = '';
var $target = '';
var $anchor_class = '';
var $show_count = true;
var $link_func = 'getData';
var $loading = '.loading';
/**
* Constructor
* #access public
* #param array initialization parameters
*/
function CI_Pagination($params = array()){
if (count($params) > 0){
$this->initialize($params);
}
log_message('debug', "Pagination Class Initialized");
}
/**
* Initialize Preferences
* #access public
* #param array initialization parameters
* #return void
*/
function initialize($params = array()){
if (count($params) > 0){
foreach ($params as $key => $val){
if (isset($this->$key)){
$this->$key = $val;
}
}
}
// Apply class tag using anchor_class variable, if set.
if ($this->anchor_class != ''){
$this->anchor_class = 'class="' . $this->anchor_class . '" ';
}
}
/**
* Generate the pagination links
* #access public
* #return string
*/
function create_links(){
// If our item count or per-page total is zero there is no need to continue.
if ($this->total_rows == 0 OR $this->per_page == 0){
return '';
}
// Calculate the total number of pages
$num_pages = ceil($this->total_rows / $this->per_page);
// Is there only one page? Hm... nothing more to do here then.
if ($num_pages == 1){
$info = 'Showing : ' . $this->total_rows;
return $info;
}
// Determine the current page number.
$CI =& get_instance();
if ($CI->uri->segment($this->uri_segment) != 0){
$this->cur_page = $CI->uri->segment($this->uri_segment);
// Prep the current page - no funny business!
$this->cur_page = (int) $this->cur_page;
}
$this->num_links = (int)$this->num_links;
if ($this->num_links < 1){
show_error('Your number of links must be a positive number.');
}
if ( ! is_numeric($this->cur_page)){
$this->cur_page = 0;
}
// Is the page number beyond the result range?
// If so we show the last page
if ($this->cur_page > $this->total_rows){
$this->cur_page = ($num_pages - 1) * $this->per_page;
}
$uri_page_number = $this->cur_page;
$this->cur_page = floor(($this->cur_page/$this->per_page) + 1);
// Calculate the start and end numbers. These determine
// which number to start and end the digit links with
$start = (($this->cur_page - $this->num_links) > 0) ? $this->cur_page - ($this->num_links - 1) : 1;
$end = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;
// Add a trailing slash to the base URL if needed
$this->base_url = rtrim($this->base_url, '/') .'/';
// And here we go...
$output = '';
// SHOWING LINKS
if ($this->show_count){
$curr_offset = $CI->uri->segment($this->uri_segment);
$info = 'Showing ' . ( $curr_offset + 1 ) . ' to ' ;
if( ( $curr_offset + $this->per_page ) < ( $this->total_rows -1 ) )
$info .= $curr_offset + $this->per_page;
else
$info .= $this->total_rows;
$info .= ' of ' . $this->total_rows . ' | ';
$output .= $info;
}
// Render the "First" link
if ($this->cur_page > $this->num_links){
$output .= $this->first_tag_open
. $this->getAJAXlink( '' , $this->first_link)
. $this->first_tag_close;
}
// Render the "previous" link
if ($this->cur_page != 1){
$i = $uri_page_number - $this->per_page;
if ($i == 0) $i = '';
$output .= $this->prev_tag_open
. $this->getAJAXlink( $i, $this->prev_link )
. $this->prev_tag_close;
}
// Write the digit links
for ($loop = $start -1; $loop <= $end; $loop++){
$i = ($loop * $this->per_page) - $this->per_page;
if ($i >= 0){
if ($this->cur_page == $loop){
$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
}else{
$n = ($i == 0) ? '' : $i;
$output .= $this->num_tag_open
. $this->getAJAXlink( $n, $loop )
. $this->num_tag_close;
}
}
}
// Render the "next" link
if ($this->cur_page < $num_pages){
$output .= $this->next_tag_open
. $this->getAJAXlink( $this->cur_page * $this->per_page , $this->next_link )
. $this->next_tag_close;
}
// Render the "Last" link
if (($this->cur_page + $this->num_links) < $num_pages){
$i = (($num_pages * $this->per_page) - $this->per_page);
$output .= $this->last_tag_open . $this->getAJAXlink( $i, $this->last_link ) . $this->last_tag_close;
}
// Kill double slashes. Note: Sometimes we can end up with a double slash
// in the penultimate link so we'll kill all double slashes.
$output = preg_replace("#([^:])//+#", "\\1/", $output);
// Add the wrapper HTML if exists
$output = $this->full_tag_open.$output.$this->full_tag_close;
?>
<script>
function getData(page){
$.ajax({
method: "POST",
url: "<?php echo $this->base_url; ?>"+page,
data: { page: page },
beforeSend: function(){
$('<?php echo $this->loading; ?>').show();
},
success: function(data){
$('<?php echo $this->loading; ?>').hide();
$('<?php echo $this->target; ?>').html(data);
}
});
}
</script>
<?php
return $output;
}
function getAJAXlink($count, $text) {
$pageCount = $count?$count:0;
return ''. $text .'';
}
}
// END Pagination Class
And the Ajax generated:
<script>
function getData(page){
$.ajax({
method: "POST",
url: "blog/category/1/ajaxPaginationCat/"+page,
data: { page: page },
beforeSend: function(){
$('.loading').show();
},
success: function(data){
$('.loading').hide();
$('#postwrap').html(data);
}
});
}
</script>
thank you so much!