Hello, there.. In this post, I would like to explain how to create simple captcha in Code Igniter. Basic on this captcha is generate random code, save it to session, and check post code with session. If the post code is match then return TRUE and vice versa.

First create validation function on your form controller.

function captcha_check($str)

{

//check captcha

$get_false=FALSE;

if (strtolower(trim($this->session->userdata(“captcha”)))!=strtolower(trim($str)))

{

$get_false = TRUE;

$this->form_validation->set_message(‘captcha_check’, ‘Wrong code, please type again!’.$this->session->userdata(“captcha”));

return FALSE;

}

if ($get_false==FALSE)

{

return TRUE;

}

}

I have Wordpress plugin for moURL my shorten application and submitted by Wordpress on view days ago. But now I don’t know how to add my plugin to Wordpress Plugin repository. I really don’t know about svn and repository on opensource project. This is my first time and I’ll try it. I read some tutorial on Wordpress.org but didn’t found yet the solution. Then I get some tutorial from Diggin Into Wordpress and wow it’s working.

Now you can get my moURL Wordpress plugin from http://wordpress.org/extend/plugins/mourl/

On this post, I want to share how to connect internet trough Huawei Modem installed on your Mac Os. First, I bought Huawei Modem and I can’t get Mac OS driver on package. So I must search driver trough internet. Download this driver on http://www.ziddu.com/download/8877516/HuaweiDataCardDriver.zip.html. Instal the driver till finish.

Then put your Huawei e160 modem to USB port. Go to the System Preference>>Network Preference and create new connection.

Choose on Huawei Mobile interface. Then type your service name. It’s up to you.

I used my local operator XLUnlimited to powered my internet connection. So I must set setting for XL operator. Then some setting on advance.

Oke. Then try to connect it.

If you see like the picture above. It’s mean your internet connection is successfully.

Today, I try to install parallel dekstop Ubuntu on Mac OS. First time you must have VMWare Fusion 3 installed on your Mac OS. You can get it on https://www.vmware.com/tryvmware/?p=vmware-fusion&lp=1 (this is trial version, you must registered to download this application).  Then you must have Ubuntu 9.10 installation CD or image. You can download on this site http://ubuntu.com. Choose the server on your country and download Ubuntu image (*.iso). After get the iso file, you can burn it to CD or keep iso file saved in your hard disk. On this case I keep iso file on my hard disk.

After You get VMWare installed on your PC, Open your VMWare Application and you’ll get this.

VMWare allow you to create parallel dekstop with 3 ways. First you can create parallel dekstop from your existing Boot Camp partition, second you can install operating system from CD or Image files, and the last you can create parallel desktop from your existing operating system on other PC trough intranet.

I won’t use CD to install this Ubuntu. So I click on “Continue without disc”.

Choose on “Use operating system installation disc image file:”, then select your Ubuntu iso file on finder.

Continue to the next step.

VMWare will automatically detect your Ubuntu iso file. Then click “continue”.

On this step, VMWare will ask for Display Name, Account Name, and Password to your Ubuntu User account. You can allow Ubuntu to read and write Mac home folder or just keep Ubuntu to read only. Then click on continue.

VMWare tools download is needed on Ubuntu. This application must be installed to enable drag and drop feature with your Mac desktop and make fullscreen resolution fit on your monitor resolution (by default not using VMWare tools is 600 x 400). Download it till finish to make it install automatically on you Ubuntu. If you don’t do this step you can install it latter.

Finish, just keep default setting then click on finish. After click on finish VMWare will start Ubuntu Installation.

The screen will prompted to install VMWare tools on Ubuntu. Enter your Ubuntu Username and Password to install VMWare tools on Ubuntu.

Then Ubuntu installation begin.

Wait till installation complete to 100% and Ubuntul will be restarted. Login with your username and password.

If VMWare tools on Ubuntu failed to install or VMWare Tools is not installed, You’ll see this message on status bar “VMWare Tools is not installed. Choose the Virtual Machine > Install VMWare Tools menu.”

Remember that if VMWare Tools is not installed, You can’t drag Mac file to Ubuntu and the highest resolution fullscreen on Ubuntu only 600×400px. Please install it manually by following the instruction on this blog.

I try to install my old application on new the version of XAMPP, but my application didn’t working correctly with the new version of PHP, it caused by deprecated function on the new version of PHP 5.3.x.

In my application just shown PHP error message.

“SPLIT() function has been DEPRECATED as of PHP 5.3.0 and REMOVED as of PHP 6.0.0. Relying on this feature is highly discouraged.”

Then, I must change SPLIT() using EXPLODE() function.

[php]

<?php

//to get categories and tags
$comma=”,”;//separate by commas
$categories=explode($comma, $row->caName);
$tags=explode($comma, $row->taName);?>

[/php]

PHP 5.3.0 introduces two new error levels: E_DEPRECATED and E_USER_DEPRECATED. The E_DEPRECATED error level is used to indicate that a function or feature has been deprecated. The E_USER_DEPRECATED level is intended for indicating deprecated features in user code, similarly to the E_USER_ERROR and E_USER_WARNINGlevels.

The following is a list of deprecated INI directives. Use of any of these INI directives will cause an E_DEPRECATED error to be thrown at startup.

• define_syslog_variables
• register_globals
• register_long_arrays
• safe_mode
• magic_quotes_gpc
• magic_quotes_runtime
• magic_quotes_sybase
• Comments starting with ‘#’ are now deprecated in .INI files.

Deprecated functions:

• call_user_method() (use call_user_func() instead)
• call_user_method_array() (use call_user_func_array() instead)
• define_syslog_variables()
• dl()
• ereg() (use preg_match() instead)
• ereg_replace() (use preg_replace() instead)
• eregi() (use preg_match() with the ‘i’ modifier instead)
• eregi_replace() (use preg_replace() with the ‘i’ modifier instead)
• set_magic_quotes_runtime() and its alias, magic_quotes_runtime()
• session_register() (use the $_SESSION superglobal instead)
• session_unregister() (use the $_SESSION superglobal instead)
• session_is_registered() (use the $_SESSION superglobal instead)
• set_socket_blocking() (use stream_set_blocking() instead)
• split() (use preg_split() instead)
• spliti() (use preg_split() with the ‘i’ modifier instead)
• sql_regcase()
• mysql_db_query() (use mysql_select_db() and mysql_query() instead)
• mysql_escape_string() (use mysql_real_escape_string() instead)
• Passing locale category names as strings is now deprecated. Use the LC_* family of constants instead.
• The is_dst parameter to mktime(). Use the new timezone handling functions instead.

Deprecated features:

• Assigning the return value of new by reference is now deprecated.
• Call-time pass-by-reference is now deprecated.
• The use of {} to access string offsets is deprecated. Use [] instead.

Impact:

• Code Igniter 1.7.1 cannot working because of this deprecated function. Please update to Code Igniter 1.7.2
• Some Wordpress function deprecated. Please see this function reference.

See more about PHP 5.3.x migration on PHP Manual.

This post talk about Tag Cloud on my previous post, but in this post I’ll show you how to integrate it into Code Igniter >> my favorite framework..

First you must create it to your own library.

this is my script:

[php]
//tag_cloud.php
class Tag_cloud{
private $arrTags;
private $sort;
private $fMaks;
private $fMin;
/**
* konstruktor
* @param $arrTags tag array
* @param $sort Boolean sort by aphabet
* @param $fMaks Int maximum size of font
* @param $fMin Int minimum size of font
*/
function __construct($arrTags, $sort = true, $fMaks = 36, $fMin = 12){
if(!is_array($arrTags)){
exit('First Argument must array!');
}
$this->arrTags = $arrTags;
$this->sort = $sort;
$this->fMaks = $fMaks;
$this->fMin = $fMin;
}
/**
*Create and print tag cloud
*
*/
function show(){
$arrTags = $this->arrTags;
if ($this->sort){
//sort by aphabet
ksort($arrTags);
}
//maximum item
$jmlMaks = max(array_values($arrTags));
//minimum item
$jmlMin = min(array_values($arrTags));
//Range total max and min
$range = $jmlMaks – $jmlMin;
//avoid divide by zero
if ($range == 0){
$range = 1;
}
//for increment font tag size
$step = ($this->fMaks – $this->fMin)/$range;
$size = 0;
$arr_item=array();
$arr_jml=array();
$arr_size=array();
$out=array();
$n=0;
while (list($item, $jml)=each($arrTags)){
//increment font size
$size =round($this->fMin+(($jml-$jmlMin)*$step));
$arr_item[$n]=$item;
$arr_jml[$n]=$jml;
$arr_size[$n]=$size;
$n++;
/*echo ‘
‘.$item.’ ‘;*/
}
$arr1 = array_values($arr_item);
$arr2 = array_values($arr_jml);
$arr3 = array_values($arr_size);
foreach($arr1 as $key1 => $value1) {
$out[(string)$value1][0] = $arr2[$key1];
$out[(string)$value1][1] = $arr3[$key1];
}
//print_r($out); // this will print out the contents of your new array
return $out;
}

}

?>
[/php]

This script will return 3 dimentional array.
Then create tags_model.php to call database tags..
for this example i have tags table with contain tag_id and tag_name where tag_id as primary key and tag_name as unique key.
This is tags_model.php

[php]
class Tags_model extends Model{
function __construct()
{
parent::Model();
}
function get_all()
{
$query=$this->db->get(‘tags’);
return $query->result();
}
}
?>
[/php]

Create active record on your Post model to count how many tags on colum tags.
For colum tags i have sparate each tag by commas. Example: code, igniter, php.
So to count how many post that contain each tag you must add this function:

[php]
function count_by_tag($tag)
{
$this->db->select(‘count(*) AS MyCount’);
$this->db->from(‘posts’);
$this->db->like(‘tag’, $tag, ‘both’);
$count=$this->db->count_all_results();
return $count;
}
[/php]

Don’t forget to add each model to controller:

[php]
$this->load->model(‘posts_model’);
$this->load->model(‘tags_model’);
[/php]

Then this is script to get data tags from database and load your own tags library.

[php]
//tags
$query=$this->tags_model->get_all();
$tags=array();
foreach ($query as $row):
$count=$this->news_model->count_by_tag($row->tag_name);
$tags[$row->tag_name]=$count;
endforeach;
$this->load->library(‘tag_cloud’, $tags);
[/php]

This tag cloud library will return 3d array.. so you must parsing each array on your view. Then create it to tag cloud using component.
this is my view:

[php]
$arr_tags=$this->tag_cloud->show();
//print_r($this->tag_cloud->show()); // this will print out the contents of your new array
foreach($arr_tags as $item => $value):
foreach ($value as $row => $val):
$jml=$value[0];
$size=$value[1];
endforeach;
echo ‘
‘.$item.’ ‘;
endforeach;
?>
[/php]

Finish.. It’s pretty simple.

I think Wordpress blogger familiar with Tag Cloud. Last time, I want to know how to make it. Looking for some tutorial and found it. In this tutorial, I must learn about OOP in PHP. With my little knowledge about OOP programing in JAVA, I tried to explore it in PHP.

To make simple tag cloud with PHP you’ll need 2 PHP file. With OOP background you must create Tag Cloud Class first then you can use it to create new Tag Cloud object.

[php]
//tagcloud.php
class TagCloud{
private $arrTags;
private $sort;
private $fMaks;
private $fMin;

/**
* konstruktor
* @param $arrTags tag array
* @param $sort Boolean sort by aphabet
* @param $fMaks Int maximum size of font
* @param $fMin Int minimum size of font
*/
public function __construct($arrTags, $sort = true, $fMaks = 36, $fMin = 12){
if(!is_array($arrTags)){
exit('First Argument must array!');
}
$this->arrTags = $arrTags;
$this->sort = $sort;
$this->fMaks = $fMaks;
$this->fMin = $fMin;
}

/**
*Create and print tag cloud
*
*/

public function show(){
$arrTags = $this->arrTags;
if ($this->sort){
//sort by aphabet
ksort($arrTags);
}
//maximum item
$jmlMaks = max(array_values($arrTags));
//minimum item
$jmlMin = min(array_values($arrTags));

//Range total max and min
$range = $jmlMaks – $jmlMin;
//avoid divide by zero
if ($range == 0){
$range = 1;
}

//for increment font tag size
$step = ($this->fMaks – $this->fMin)/$range;

$size = 0;
while (list($item, $jml)=each($arrTags)){
//increment font size
$size =round($this->fMin+(($jml-$jmlMin)*$step));
?>

One day, I got problem with dynamically dropdown value on Code Igniter. First think i hope I can generate dropdown with values from mySql database. I want to use form helper that provided by Code Igniter to generate form.

Basically to make dropdown input on controller are:
[php]
…
$data['input_category'] = array(
“1″ => “Mobile”,
“2″ => “Web”
);
…
[/php]

Then in views:

[php]
…

…
[/php]

It’s pretty simple.

How to make it values generate dynamically?

I’ll created each array to string and then explode it into an array. It’s working, but I got “‘1′ => ‘Mobile’” on my dropdown input and array started to 0. So “1″ => “Mobile”’s select name became 0 not id of mobile.

So I must create array_combine() function to make fix this problem.
This is my clear code.

[php]
$cat_id=”";
$category=”";
$query=$this->dn_categories_model->get_all();
foreach($query as $row):
$cat_id .= “$row->cat_id”;
$cat_id .= “,”;
$category .= “$row->category”;
$category .= “,”;
endforeach;
$comma=”,”;//separate by commas
$arr_cat_id=explode($comma,$cat_id);
$arr_category=explode($comma,$category);
$options=array_combine($arr_cat_id,$arr_category);

$data['input_category'] = $options;
[/php]

I wrote it to on Code Igniter forum.

When you upgrade kernel on ubuntu, you will add grub menu with new kernel version.

Ubuntu doesn’t remove the old entries. It’s very dirty. Why Ubuntu do this? How to remove it.. Hmm.. after several time browsing to find the solution…I found the best solution for me.

This is my Grub menu after upgrade kernel:

The best way to remove the older menu, you’ll need to edit the file /boot/grub/menu.lst. You can do this by using Alt+F2 and then typing in the following command:

gksu gedit /boot/grub/menu.lst

Click on run and you’ll get the file open. find “#howmany=all” and change it to “#howmany=1″.

Then run “sudo update-grub” to update changes. Next time, only newest kernel lines will be shown.

If you have more than one OS in your PC (example: Ubuntu and Windows), the tip that I mentioned above is the best way to update GRUB automatically. You dont need to delete any lines (and change the “default” value also) after every time your Ubuntu box is updated