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<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Pagenation extends CI_Controller {
public function __construct() {
parent:: __construct();
$this->load->helper("url");
$this->load->model("Countries");
$this->load->library("pagination");
}
public function pagenum()
{
$config = array();
$config["base_url"] = base_url() . "pagenation/pagenum";
$config["total_rows"] = $this->Countries->record_count();
$config["per_page"] = 20;
$config["uri_segment"] = 3;
$choice = $config["total_rows"] / $config["per_page"];
$config["num_links"] = round($choice);
$this->pagination->initialize($config);
$page = ($this->uri->segment(3))? $this->uri->segment(3) : 0;
$data["results"] = $this->Countries->fetch_countries($config["per_page"], $page);
$data["links"] = $this->pagination->create_links();
$this->load->view("expagenation", $data);
}
}
Pagination Model (Countries.php) application\models\Countries.php
<?php
class Countries extends CI_Model
{
public function __construct() {
parent::__construct();
}
public function record_count() {
return $this->db->count_all("country");
}
public function fetch_countries($limit, $start) {
$this->db->limit($limit, $start);
$query = $this->db->get("country");
if ($query->num_rows() > 0) {
foreach ($query->result() as $row) {
$data[] = $row;
}
return $data;
}
return false;
}
}
create expagenation.php file under folder name application/views/expagenation.php
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class My404 extends CI_Controller
{
public function __construct()
{
parent::__construct();
}
public function index()
{
$this-<output-<set_status_header('404');
$this-<load-<view('err404');
}
}
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Chat extends CI_Controller {
/* The default function that gets called when visiting the page */
public function index() {
$this->load->view('chat-view');
}
public function get_chats() {
/* Connect to the mySQL database - config values can be found at:
/application/config/database.php */
$dbconnect = $this->load->database();
/* Load the database model:
/application/models/simple_model.php */
$this->load->model('Chat_model');
/* Create a table if it doesn't exist already */
$this->Chat_model->create_table();
echo json_encode($this->Chat_model->get_chat_after($_REQUEST["time"]));
}
public function insert_chat() {
/* Connect to the mySQL database - config values can be found at:
/application/config/database.php */
$dbconnect = $this->load->database();
/* Load the database model:
/application/models/simple_model.php */
$this->load->model('Chat_model');
/* Create a table if it doesn't exist already */
$this->Chat_model->create_table();
$this->Chat_model->insert_message($_REQUEST["message"]);
}
public function time() {
echo "[{\"time\":" + time() + "}]";
}
}?>
Models chat_model.php
class Chat_model extends CI_Model {
function __construct()
{
/* Call the Model constructor */
parent::__construct();
}
function get_last_item()
{
$this->db->order_by('id', 'DESC');
$query = $this->db->get('Chats', 1);
return $query->result();
}
function insert_message($message)
{
$this->message = $message;
$this-> time = time();
$this->db->insert('Chats', $this);
}
function get_chat_after($time)
{
$this->db->where('time >', $time)->order_by('time', 'DESC')->limit(10);
$query = $this->db->get('Chats');
$results = array();
foreach ($query->result() as $row)
{
$results[] = array($row->message,$row->time);
}
return array_reverse($results);
}
function create_table()
{
/* Load db_forge - used to create databases and tables */
$this->load->dbforge();
/* Specify the table schema */
$fields = array(
'id' => array(
'type' => 'INT',
'constraint' => 5,
'unsigned' => TRUE,
'auto_increment' => TRUE
),
'message' => array(
'type' => 'TEXT'
),
'time' => array(
'type' => 'INT'
)
);
/* Add the field before creating the table */
$this->dbforge->add_field($fields);
/* Specify the primary key to the 'id' field */
$this->dbforge->add_key('id', TRUE);
/* Create the table (if it doesn't already exist) */
$this->dbforge->create_table('Chats', TRUE);
}
}
Views chat-view.php
<html>
<head>
<title> Chat Exmaples! </title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script>
var time = 0;
var updateTime = function (cb) {
$.getJSON("index.php/chat/time", function (data) {
cb(~~data);
});
};
var sendChat = function (message, cb) {
$.getJSON("index.php/chat/insert_chat?message=" + message, function (data){
cb();
});
}
var addDataToReceived = function (arrayOfData) {
arrayOfData.forEach(function (data) {
$("#received").val($("#received").val() + "\n" + data[0]);
});
}
var getNewChats = function () {
$.getJSON("index.php/chat/get_chats?time=" + time, function (data){
addDataToReceived(data);
// reset scroll height
setTimeout(function(){
$('#received').scrollTop($('#received')[0].scrollHeight);
}, 0);
time = data[data.length-1][1];
});
}
// using JQUERY's ready method to know when all dom elements are rendered
$( document ).ready ( function () {
// set an on click on the button
$("form").submit(function (evt) {
evt.preventDefault();
var data = $("#text").val();
$("#text").val('');
// get the time if clicked via a ajax get queury
sendChat(data, function (){
alert("dane");
});
});
setInterval(function (){
getNewChats(0);
},1500);
});
</script>
</head>
<body>
<h1> Chat Example on Codeigniter </h1>
<textarea id="received" rows="10" cols="50">
</textarea>
<form>
<input id="text" type="text" name="user">
<input type="submit" value="Send">
</form>
</body>
</html>
Copy the code given below and store it at application/controllers/upload.php. Create "uploads" folder at the root of CodeIgniter i.e. at the parent directory of application folder.
<?php
class Upload extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->helper(array('form', 'url'));
}
public function index() {
$this->load->view('upload_form', array('error' => ' ' ));
}
public function do_upload() {
$config['upload_path'] = './uploads/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = 100;
$config['max_width'] = 1024;
$config['max_height'] = 768;
$this->load->library('upload', $config);
if ( ! $this->upload->do_upload('userfile')) {
$error = array('error' => $this->upload->display_errors());
$this->load->view('upload_form', $error);
}
else {
$data = array('upload_data' => $this->upload->data());
$this->load->view('upload_success', $data);
}
}
}
?>
Make the following change in the route file in application/config/routes.php and add the following line at the end of file.
$route['upload'] = 'Upload';
Now let us execute this example by visiting the following URL in the browser. Replace the yoursite.com with your URL.
