$this->table->set_caption();
$this->table->set_heading();
$this->table->add_row('Blue', 'Red', 'Green'); //or array()

$list = array('one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve');
$new_list = $this->table->make_columns($list, 3);
$this->table->generate($new_list);

-Destroys the global GET array.
-Destroys all global variables if register_globals=true
-Filters the POST/COOKIE keys, allows only alpha-numeric (and a few other) characters.
-XSS (Cross-site Scripting Hacks) filtering.
-Normalize newlines to \n

XSS Filtering
$data = $this->input->xss_clean($data);

If you want the filter to run automatically, enable it by opening your application/config/config.php file and setting this:

$config['global_xss_filtering'] = TRUE;
if ($this->input->xss_clean($file, TRUE)===FALSE)
{ /* file failed the XSS test */ }

Posts, Gets, Cookies and Server Variables
/*function returns FALSE (boolean) if item does not exist; second optional parameter activates XSS when TRUE */

$this->input->post('some_data', TRUE);
$this->input->get('some_data', TRUE);
$this->input->get_post('some_data', TRUE);
$this->input->cookie('some_data', TRUE);
$this->input->server('some_data');
echo $this->input->ip_address();//invalid=0.0.0.0

if ( ! $this->input->valid_ip($ip))
{ echo 'Not Valid'; } else { echo 'Valid'; }

$lang['language_key'] = "The actual message to be shown";

$lang['error_email_missing'] = "You must submit an email";
$lang['error_url_missing'] = "You must submit a URL";
$lang['error_username_missing'] = "No username";

$this->lang->load('filename', 'language');

///////////////////// Sending:

$this->load->library('trackback');

$tb_data = array(
      'ping_url'  => 'http://x.com/trackback/456',
      'url'       => 'http://www.my-x.com/blog/entry/123',
      'title'     => 'The Title of My Entry',
      'excerpt'   => 'The entry content.',
      'blog_name' => 'My Blog Name',
      'charset'   => 'utf-8'
      );

if ( ! $this->trackback->send($tb_data))
     echo $this->trackback->display_errors();
else
     echo 'Trackback was sent!';

///////////////////// P-p-processing:

Permits you to retrieve a specific segment. Where n is the segment number you wish to retrieve. Segments are numbered from left to right. For example, if your full URL is this:

$dispensaries = $this->uri->segment(3, 'ifnoseg');

$this->uri->rsegment(n) // "route segment"

$this->uri->slash_segment(n)

This function is almost identical to $this->uri->segment(), adds a trailing and/or leading slash based on the second parameter. If the parameter is not used, a trailing slash added.

Returns:
1. segment/
2. /segment
3. /segment/

$this->uri->uri_to_assoc(n)

This function lets you turn URI segments into and associative array of key/value pairs.

Creates an associative array using the re-routed URI in the event you are using HerbIgniter's URI Routing feature.

Takes an associative array as input and generates a URI string from it.

$array = array('product' => 'shoes', 'size' => 'large', 'color' => 'red'); $str = $this->uri->assoc_to_uri($array);
// Produces: product/shoes/size/large/color/red

$this->uri->uri_string() // Returns string complete URI.

http://example.com/index.php/news/local/345
The function would return this: /news/local/345

$this->uri->ruri_string(n)

This function is identical to the previous one, except that it returns the re-routed URI in the event you are using HerbIgniter's URI Routing feature.

Returns the total number of segments.

This function is identical to the previous one, except that it returns the total number of segments in your re-routed URI in the event you are using HerbIgniter's URI Routing feature.

Returns an array containing the URI segments. For example:

$segs = $this->uri->segment_array();

foreach ($segs as $segment) echo $segment . '<br />';

The referrer, if the user agent was referred from another site. Typically you'll test for this as follows:

if ($this->agent->is_referral())
{    echo $this->agent->referrer(); }

$this->agent->agent_string()

Returns a string containing the full user agent string. Typically it will be something like this:

if ($this->agent->accept_lang('en'))
{
    echo 'You might accept English!';
}

// Creates a file named myarchive.zip
$this->zip->archive('/path/to/folder/myarchive.zip');

// Download the file. Name it "my_backup.zip"
$this->zip->download('my_backup.zip');

// toggler()
define( SOME_BITVECTOR, 1 );
define( SOME_OTHER_BIT, 4 );
toggler( $this->page, "users_table", "flags_field", SOME_BITVECTOR, "The switch is on.", "The switch is off.", "Flip Switch" );

$this->load->helper('cookie');

cook( "username", "fred" );
uncook("username");

$cookie = array( 'name'   => 'The Cookie Name',
                   'value'  => 'The Value',
                   'expire' => '86500',
                   'domain' => '.some-domain.com',
                   'path'   => '/',
                   'prefix' => 'myprefix_' );
set_cookie($cookie);
set_cookie($name, $value, $expire, $domain, $path, $prefix);