Building a Simple Blogger with the Code Igniter PHP Framework

In case you haven't heard about it, Code Igniter is a powerful, comprehensive framework written in PHP 4 that provides developers with a robust set of classes and helpers that can be used for building different web applications by means of the Model-View-Controller pattern, which separates application logic from visual presentation.

Thus, in this series of articles I'm going to explain how to build a basic blogger with Code Igniter. I will explain it in a step-by-step fashion to allow you to get an excellent grounding in its main features, as well as learn how to implement the MVC approach in a real-world situation.

This is a sample blog with Code Igniter you can download it here.

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create and configure htaccess for codeigniter

1. Create .htaccess file on index.php.
   

   RewriteEngine On
   RewriteBase /sitename
   RewriteCond %{REQUEST_URI} ^system.*
   RewriteRule ^(.*)$ /index.php/$1 [L]
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteRule ^(.*)$ index.php/$1 [L]
   
   
   php_flag display_errors on

2. Enable rewrite_module on apache server.
3. Enable include_module on apache server.
4. Enable cgi_module on apache server.
5. Enable short open tag on php server.
6. Configure config.php become.
   

   $config['index_page'] = "";

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Make Auto Readmore on Blogspot

1. Edit HTML and find </head>.
2. Copy-paste and put this script bellow in above code script </head>, and continuous "Make Auto Read More Functions".

<script type='text/javascript'>
var thumbnail_mode = "float" ;

summary_noimg = 250;
summary_img = 250;
img_thumb_height = 120;
img_thumb_width = 120;
</script>
<script type='text/javascript'>

//<![CDATA[

function removeHtmlTag(strx,chop){
if(strx.indexOf("<")!=-1)
{
var s = strx.split("<");
for(var i=0;i<s.length;i++){
if(s[i].indexOf(">")!=-1){
s[i] = s[i].substring(s[i].indexOf(">")+1,s[i].length);
}
}
strx = s.join("");
}
chop = (chop < strx.length-1) ? chop : strx.length-2;
while(strx.charAt(chop-1)!=' ' && strx.indexOf(' ',chop)!=-1) chop++;
strx = strx.substring(0,chop-1);
return strx+'...';
}
function createSummaryAndThumb(pID){
var div = document.getElementById(pID);
var imgtag = "";
var img = div.getElementsByTagName("img");
var summ = summary_noimg;
if(img.length>=1) {
imgtag = '<span style="float:left; padding:0px 10px 5px 0px;"><img src="'+img[0].src+'" width="'+img_thumb_width+'px" height="'+img_thumb_height+'px"/></span>';
summ = summary_img;
}
var summary = imgtag + '<div>' + removeHtmlTag(div.innerHTML,summ) + '</div>';
div.innerHTML = summary;
}
//]]>
</script>

3. On EDIT HTML, check "Expand widget template" and found this script code bellow

<data:post.body/>

4. If you have been found <data:post.body>, copy-paste this script code bellow:

<b:if cond='data:blog.pageType != "item"'>
<div expr:id='"summary" + data:post.id'><data:post.body/></div>
<script type='text/javascript'>createSummaryAndThumb("summary<data:post.id/>");</script>
<span class='rmlink' style='float:left'><a expr:href='data:post.url' expr:title='data:post.title'>Read More »»»</a></span>
</b:if>
<b:if cond='data:blog.pageType == &quot;item&quot;'><data:post.body/></b:if>

5. Save your template and see the result.

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Create Authentication Login On Code Igniter With Extends Controller

1. Create MY_Controller.php on /system/apllication/libraries/.

<?php
class MY_Controller extends Controller {

    function  My_Controller() {
        parent::Controller();
        $this->is_logged_in();
    }

    private function is_logged_in() {
        $this->ci =& get_instance();
        $this->ci->load->library('session');
        if(! $this->ci->session->userdata('login')) {
            redirect('login');
        }
    }

}
?>

2. Login Controller login.php

<?

/**
 * Login Class
 *
 *
 */
class Login extends Controller {
 /**
  * Constructor
  */
 function login()
 {
  parent::Controller();
  $this->load->model('Login_model', '', TRUE);
 }

 /**
  * Check User Status, if login status it will appear in main page,
  * If Not it'll redirect in login page
  */
 function index()
 {
  if ($this->session->userdata('login') == TRUE)
  {
   redirect('home');
  }
  else
  {
   $this->load->view('login/login_view');
  }
 }

 /**
  * Login
  */
 function process_login()
 {

  $this->form_validation->set_rules('username', 'Username', 'required');
  $this->form_validation->set_rules('password', 'Password', 'required');

  if ($this->form_validation->run() == TRUE)
  {
   $username = $this->input->post('username');
   $password = $this->input->post('password');

   if ($this->Login_model->check_user($username, $password) == TRUE)
   {
    $row = $this->Login_model->data_user($username);
    $data = array('jbname' => $username, 'login' => TRUE, 'jbnama' => $row['nama'], 'jbid' => $row['id_user']);
    $this->session->set_userdata($data);
    redirect('home/');
   }
   else
   {
    $this->session->set_flashdata('message', 'Sorry, username and password is wrong');
    redirect('login/index');
   }
  }
  else
  {
   $this->load->view('login/login_view');
  }
 }

 /**
  * logout
  */
 function process_logout()
 {
  $this->session->sess_destroy();
  redirect('login', 'refresh');
 }
}

3. Make Model Login_model.php

<?php
/**
 * Login_model Class
 *
 *
 */
class Login_model extends Model {
 /**
  * Constructor
  */
 function Login_model()
 {
  parent::Model();
 }

 // Inisialisation user table name
 var $table = 'user';

 /**
  * Check user table
  */
 function check_user($username, $password)
 {
  $password = md5($password);
  $query = $this->db->get_where($this->table, array('username' => $username, 'pass' => $password, 'aktif' => 1,
  'nm_module' => 'akd'), 1, 0);

  if ($query->num_rows() > 0)
  {
   return TRUE;
  }
  else
  {
   return FALSE;
  }
 }

 function data_user($username){
  $sql = "select id_user, nama from user where username = '$username' and nm_module = 'akd' ";
  $query = $this->db->query($sql);
  $row = $query->row_array();
  return $row;
 }

}
// END Login_model Class

/* End of file login_model.php */
/* Location: ./system/application/model/login_model.php */

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Simple General Helper on Code Igniter

1. Create general_helper.php on /sytem/application/helpers.

<?php

/**
 * change date format from dd/mm/yyyy become yyyy-mm-dd
 * @param <type> $date
 * @return string
 */
function encode_date($date) {
    list($day, $month, $year) = explode('/', $date);
    $new_date = $year . "-" . $month . "-" . $day;
    return $new_date;
}

/**
 * change date format from yyyy-mm-dd become dd/mm/yyyy
 * @param <type> $date
 * @return string
 */
function decode_date($date) {
    list($year, $month, $day) = explode('-', $date);
    $new_date = $day . "/" . $month . "/" . $year;
    return $new_date;
}

/**
 * create money value in Rupiah
 * @param <type> $uang
 * @return <type>
 */
function format_rupiah($uang) {
    return "Rp. ". number_format($uang, 0, ",", ".");
}

function format_dana($uang) {
    return number_format($uang, 0, ".", "");
}
        
function indonesian_month($month) {
    switch ($month) {
        case "01" : $imonth = "Januari"; break;
        case "02" : $imonth = "Februari"; break;
        case "03" : $imonth = "Maret"; break;
        case "04" : $imonth = "April"; break;
        case "05" : $imonth = "Mei"; break;
        case "06" : $imonth = "Juni"; break;
        case "07" : $imonth = "Juli"; break;
        case "08" : $imonth = "Agustus"; break;
        case "09" : $imonth = "September"; break;
        case "10" : $imonth = "Oktober"; break;
        case "11" : $imonth = "November"; break;
        case "12" : $imonth = "Desember"; break;
        default  : $imonth = "-"; break;
    }
    return $imonth;
}

/**
 * change date format to indonesia
 * @param <type> $month
 * @return string
 */
function indonesian_date($date) {
    list($year, $month, $day) = explode('-', $date);
    $new_date = $day ." ". indonesian_month($month) . " ". $year;
    return $new_date;
}

function indonesian_yearmonth($yearmonth) {
    list($month,$year) = explode(' ', $yearmonth);
    $new_yearmonth =  indonesian_month($month) . " ". $year;
    return $new_yearmonth;
}

function bulan_hari($day) {
    $tahun = floor($day/365);
    $bulan=floor(($day - ($tahun * 365))/30);
    $hari=$day - $bulan * 30;
    if($day=="30"){return $bulan." Bulan ";}
    elseif($day >= "30"){return $bulan." Bulan, ".$hari." Hari";}
    else{return $hari." Hari";}

}
?>

2. Controller script

<?php

/**
 * @property CI_DB_active_record $db
 */
class tryhelper extends MY_Controller {

    function cobapdf() {
        parent::MY_Controller();
  $this->load->helper('general_helper');
    }

    function index() {
        echo indonesia_month('01');
    }
}
?>

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Exsport to PDF with dompdf in Code Igniter

1. cDownload dompf from here and exstract the file.
2. Then put to the directory ./system/application/plugins/.
3. After that then create new file on ./system/application/plugins/dompdf_pi.php like this

<?php

if (!defined('BASEPATH'))
    exit('No direct script access allowed');

/**
 * Try increasing memory available, mostly for PDF generation
 */
ini_set("memory_limit", "32M");

function pdf_create($html, $filename, $stream=TRUE, $orientation="portrait") {
    require_once(BASEPATH . "application/plugins/dompdf/dompdf_config.inc.php");

    $dompdf = new DOMPDF();
    $dompdf->set_paper("a4", $orientation);
    $dompdf->load_html($html);
    $dompdf->render();
    if ($stream) { //open only
        $dompdf->stream($filename . ".pdf");
    } else { // save to file only, your going to load the file helper for this one
        write_file("pdf/$filename.pdf", $dompdf->output());
    }
}

?>

4. Create controler mypdf.php

<?php

/**
 * @property CI_DB_active_record $db
 */
class mypdf extends MY_Controller {

    function mypdf() {
        parent::MY_Controller();
  $this->load->plugins('dompdf_pi');
    }

    function index() {
     $html="Hello Word";
  $filename="Mypdf";
        pdf_create($html, $filename, $stream=TRUE, $orientation='portrait');
    }

 }
?>

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Count day, month and year from two date

$tgl1 = "2009-10-01";  // 1 October 2009
$tgl2 = "2009-11-10";  // 10 October 2009

// break dates to get the date, month and year
// from the first date

$pecah1 = explode("-", $tgl1);
$date1 = $pecah1[2];
$month1 = $pecah1[1];
$year1 = $pecah1[0];

// break dates to get the date, month and year
// from the second date

$pecah2 = explode("-", $tgl2);
$date2 = $pecah2[2];
$month2 = $pecah2[1];
$year2 =  $pecah2[0];

// count JDN from each of the dates

$jd1 = GregorianToJD($month1, $date1, $year1);
$jd2 = GregorianToJD($month2, $date2, $year2);

// compute difference the second day date

$selisih = $jd2 - $jd1;
$month=floor(($selisih - ($tahun * 365))/30);
$day=$selisih - $bulan * 30;

echo "difference the both of the day date is ".$month." month ".$day." day";

This Source is originaly from www.ms-room.com

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Simple Script Exsport Excel With PHP

First example

<?
header("Content-Type: application/vnd.ms-excel");
echo "<table border=1>
<tr>
<td>Cell 1</td>
<td>Cell 2</td>
</tr>
</table>";
?>

Implementation

$header = "Header1" . "\t";
$header .= "Header2" . "\t";

//Reading the data thro' POST
$data= $_POST['header1']. "\t";
$data .= $_POST['header2'] . "\t";

header("Content-type: application/x-msdownload");
header("Content-Disposition: attachment; filename=xyz.xls");
header("Pragma: no-cache");
header("Expires: 0");
print "$header\n$data";

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