### Basic Pagination Setup in CodeIgniter

Source: https://codeigniter.com/userguide3/libraries/pagination.html

This example demonstrates how to load the pagination library, set essential configuration options, and create pagination links within a controller method. Ensure 'base_url', 'total_rows', and 'per_page' are correctly configured for your application.

```php
$this->load->library('pagination');

$config['base_url'] = 'http://example.com/index.php/test/page/';
$config['total_rows'] = 200;
$config['per_page'] = 20;

$this->pagination->initialize($config);

echo $this->pagination->create_links();

```

--------------------------------

### Install Sphinx and PHP Domain Extension

Source: https://codeigniter.com/userguide3/documentation/index.html

Use easy_install to install Sphinx and the sphinxcontrib-phpdomain extension. Ensure Python is installed.

```bash
easy_install "sphinx==1.2.3"
easy_install "sphinxcontrib-phpdomain==0.1.3.post1"

```

--------------------------------

### Usage Example

Source: https://codeigniter.com/userguide3/libraries/migration.html

Example controller to run migrations.

```APIDOC
## Usage Example

Place the following code in **application/controllers/Migrate.php** to update the schema.

### Method

This is a conceptual example of a controller for running migrations.

### Code Example
```php
<?php

class Migrate extends CI_Controller
{

        public function index()
        {
                $this->load->library('migration');

                if ($this->migration->current() === FALSE)
                {
                        show_error($this->migration->error_string());
                }
        }

}
```
```

--------------------------------

### Caching Driver - Example Usage

Source: https://codeigniter.com/userguide3/libraries/caching.html

Demonstrates how to load the cache driver, specify an adapter (e.g., APC), and set a fallback adapter (e.g., file). It also shows how to get and save cache items, including setting an expiration time.

```APIDOC
## Caching Driver - Example Usage

The following example will load the cache driver, specify APC as the driver to use, and fall back to file-based caching if APC is not available in the hosting environment.

```php
$this->load->driver('cache', array('adapter' => 'apc', 'backup' => 'file'));

if ( ! $foo = $this->cache->get('foo'))
{
        echo 'Saving to the cache!<br />';
        $foo = 'foobarbaz!';

        // Save into the cache for 5 minutes
        $this->cache->save('foo', $foo, 300);
}

echo $foo;
```

You can also prefix cache item names via the **key_prefix** setting, which is useful to avoid collisions when you’re running multiple applications on the same environment.

```php
$this->load->driver('cache',
        array('adapter' => 'apc', 'backup' => 'file', 'key_prefix' => 'my_')
);

$this->cache->get('foo'); // Will get the cache entry named 'my_foo'
```
```

--------------------------------

### Database Configuration Example (Oracle)

Source: https://codeigniter.com/userguide3/database/configuration.html

An example configuration for an Oracle database connection. Note the use of 'oci8' as the dbdriver and the 'hostname' format.

```php
$db['default']['hostname'] = '//localhost/XE';
$db['default']['username'] = 'admin_user';
$db['default']['password'] = 'admin_password';
$db['default']['database'] = 'my_oracle_db';
$db['default']['dbdriver'] = 'oci8';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### _output() Method Example

Source: https://codeigniter.com/userguide3/general/controllers.html

An example of the _output() method, which receives the finalized output data before it's sent to the browser. This allows for post-processing of the output.

```php
public function _output($output)
{
        echo $output;
}


```

--------------------------------

### Database Configuration Example (PostgreSQL)

Source: https://codeigniter.com/userguide3/database/configuration.html

An example configuration for a PostgreSQL database connection. Note the 'dbdriver' is set to 'postgre' and the 'port' is specified.

```php
$db['default'] = array(
	'hostname' => 'localhost',
	'port' => '5432',
	'username' => 'my_username',
	'password' => 'my_password',
	'database' => 'my_database',
	'dbdriver' => 'postgre',
	'dbprefix' => '',
	'pconnect' => FALSE,
	'db_debug' => TRUE,
	'cache_on' => FALSE,
	'cachedir' => '',
	'char_set' => 'utf8',
	'dbcollat' => 'utf8_general_ci',
	'swap_pre' => '',
	'encrypt' => FALSE,
	'compress' => FALSE,
	'stricton' => FALSE,
	'failover' => array(),
	'save_queries' => TRUE
);
```

--------------------------------

### PHP Method Documentation Example

Source: https://codeigniter.com/userguide3/documentation/index.html

This example demonstrates the ReST syntax for documenting a PHP class method, including parameters, return types, and usage examples. It requires the `php:class` and `php:method` directives.

```rst
.. php:class:: Some_class

        .. php:method:: some_method ( $foo [, $bar [, $bat]])

                This function will perform some action. The ``$bar`` array must contain
                a something and something else, and along with ``$bat`` is an optional
                parameter.

                :param int $foo: the foo id to do something in
                :param mixed $bar: A data array that must contain a something and something else
                :param bool $bat: whether or not to do something
                :returns: FALSE on failure, TRUE if successful
                :rtype: bool

                ::

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

                        $bar = array(
                                'something'             => 'Here is this parameter!',
                                'something_else'        => 42
                        );

                        $bat = $this->some_class->should_do_something();

                        if ($this->some_class->some_method(4, $bar, $bat) === FALSE)
                        {
                                show_error('An Error Occurred Doing Some Method');
                        }

                .. note:: Here is something that you should be aware of when using some_method().
                                For real.

                See also :meth:`Some_class::should_do_something`


        .. php:method:: should_do_something()

                :returns: Whether or not something should be done
                :rtype: bool

```

--------------------------------

### Method Documentation Example

Source: https://codeigniter.com/userguide3/documentation/index.html

Example of documenting a class method using Sphinx directives, including parameters, return types, and code examples.

```APIDOC
## Method Documentation

When documenting class methods for third party developers, Sphinx provides directives to assist and keep things simple. For example, consider the following ReST:

```rst
.. php:class:: Some_class

    .. php:method:: some_method ( $foo [, $bar [, $bat]])

            This function will perform some action. The ``$bar`` array must contain
            a something and something else, and along with ``$bat`` is an optional
            parameter.

            :param int $foo: the foo id to do something in
            :param mixed $bar: A data array that must contain a something and something else
            :param bool $bat: whether or not to do something
            :returns: FALSE on failure, TRUE if successful
            :rtype: bool

            ::

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

                    $bar = array(
                            'something'             => 'Here is this parameter!',
                            'something_else'        => 42
                    );

                    $bat = $this->some_class->should_do_something();

                    if ($this->some_class->some_method(4, $bar, $bat) === FALSE)
                    {
                            show_error('An Error Occurred Doing Some Method');
                    }

            .. note:: Here is something that you should be aware of when using some_method().
                            For real.

            See also :meth:`Some_class::should_do_something`


    .. php:method:: should_do_something()

            :returns: Whether or not something should be done
            :rtype: bool
```

It creates the following display: 

_class_`Some_class`
     

`some_method`(_$foo_[, _$bar_[, _$bat_]])
    
This function will perform some action. The `$bar` array must contain a something and something else, and along with `$bat` is an optional parameter.
Parameters:| 
  * **$foo** (_int_) – the foo id to do something in
  * **$bar** (_mixed_) – A data array that must contain a something and something else
  * **$bat** (_bool_) – whether or not to do something

  
---|---  
Returns:| FALSE on failure, TRUE if successful  
Return type:| bool  
```php
$this->load->library('some_class');

$bar = array(
        'something'             => 'Here is this parameter!',
        'something_else'        => 42
);

$bat = $this->some_class->should_do_something();

if ($this->some_class->some_method(4, $bar, $bat) === FALSE)
{
        show_error('An Error Occurred Doing Some Method');
}

```

Note
Here is something that you should be aware of when using some_method(). For real.
See also `Some_class::should_do_something()` 

`should_do_something`()
     Returns:| Whether or not something should be done  
---|---  
Return type:| bool
```

--------------------------------

### Database Configuration Example (MySQLi)

Source: https://codeigniter.com/userguide3/database/configuration.html

An example of a typical configuration for a MySQLi database connection. Ensure 'dbdriver' is set to 'mysqli' and fill in your specific connection details.

```php
$db['default'] = array(
	'hostname' => 'localhost',
	'username' => 'my_username',
	'password' => 'my_password',
	'database' => 'my_database',
	'dbdriver' => 'mysqli',
	'dbprefix' => '',
	'pconnect' => FALSE,
	'db_debug' => TRUE,
	'cache_on' => FALSE,
	'cachedir' => '',
	'char_set' => 'utf8',
	'dbcollat' => 'utf8_general_ci',
	'swap_pre' => '',
	'encrypt' => FALSE,
	'compress' => FALSE,
	'stricton' => FALSE,
	'failover' => array(),
	'save_queries' => TRUE
);
```

--------------------------------

### Example URI for Blog Controller

Source: https://codeigniter.com/userguide3/general/controllers.html

This is an example URI that would trigger the 'index' method of the 'blog' controller by default.

```plaintext
example.com/index.php/blog/index/

```

--------------------------------

### Example Pagination Query String Link

Source: https://codeigniter.com/userguide3/libraries/pagination.html

Demonstrates a pagination link when using query strings.

```http
http://example.com/index.php?c=test&m=page&per_page=20
```

--------------------------------

### Database Configuration Example (CubeDB)

Source: https://codeigniter.com/userguide3/database/configuration.html

Configuration for connecting to a CubeDB database. The 'dbdriver' is set to 'cubrid'.

```php
$db['default']['hostname'] = 'localhost';
$db['default']['port'] = '33000';
$db['default']['username'] = 'admin_user';
$db['default']['password'] = 'admin_password';
$db['default']['database'] = 'my_database';
$db['default']['dbdriver'] = 'cubrid';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### Example URL with Suffix

Source: https://codeigniter.com/userguide3/general/urls.html

Demonstrates how a URL appears after adding a suffix, such as '.html', for type hinting.

```text
example.com/index.php/products/view/shoes.html
```

--------------------------------

### Database Configuration Example (SQLite3)

Source: https://codeigniter.com/userguide3/database/configuration.html

Configuration for connecting to an SQLite3 database. The 'dbdriver' is set to 'sqlite3'.

```php
$db['default']['database'] = APPPATH.'database/my_database.db';
$db['default']['dbdriver'] = 'sqlite3';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### Controller Example with Dynamic Data

Source: https://codeigniter.com/userguide3/general/views.html

A controller example that prepares an associative array with data to be passed to a view. This data will be accessible as variables within the view file.

```php
<?php
class Blog extends CI_Controller {

        public function index()
        {
                $data['title'] = "My Real Title";
                $data['heading'] = "My Real Heading";

                $this->load->view('blogview', $data);
        }
}


```

--------------------------------

### Create a Migration

Source: https://codeigniter.com/userguide3/libraries/migration.html

Example of creating a new migration file to add a 'blog' table to the database.

```APIDOC
## Create a Migration

Migrations are stored in the **application/migrations/** directory and named with a timestamp prefix (e.g., `_20121031100537_add_blog.php`).

### Method

This is a conceptual example of a migration class.

### Code Example
```php
<?php

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

class Migration_Add_blog extends CI_Migration {

        public function up()
        {
                $this->dbforge->add_field(array(
                        'blog_id' => array(
                                'type' => 'INT',
                                'constraint' => 5,
                                'unsigned' => TRUE,
                                'auto_increment' => TRUE
                        ),
                        'blog_title' => array(
                                'type' => 'VARCHAR',
                                'constraint' => '100',
                        ),
                        'blog_description' => array(
                                'type' => 'TEXT',
                                'null' => TRUE,
                        ),
                ));
                $this->dbforge->add_key('blog_id', TRUE);
                $this->dbforge->create_table('blog');
        }

        public function down()
        {
                $this->dbforge->drop_table('blog');
        }
}
```

### Configuration

Set the migration version in **application/config/migration.php**:

```php
$config['migration_version'] = 20121031100537;
```
```

--------------------------------

### Database Configuration Example (ODBC)

Source: https://codeigniter.com/userguide3/database/configuration.html

Configuration for connecting to a database using ODBC. The 'dbdriver' is set to 'odbc'.

```php
$db['default']['dsn'] = 'your_odbc_dsn';
$db['default']['username'] = 'admin_user';
$db['default']['password'] = 'admin_password';
$db['default']['database'] = 'my_database';
$db['default']['dbdriver'] = 'odbc';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### Initialize Library with Parameters

Source: https://codeigniter.com/userguide3/general/creating_libraries.html

Load a library and pass an array of parameters to its constructor.

```php
$params = array('type' => 'large', 'color' => 'red');

$this->load->library('someclass', $params);
```

--------------------------------

### Correct Class Naming Convention

Source: https://codeigniter.com/userguide3/general/styleguide.html

Example of a correct class naming convention, starting with an uppercase letter and using underscores for word separation.

```php
class Super_class
```

--------------------------------

### Invalid Controller Class Name

Source: https://codeigniter.com/userguide3/general/controllers.html

Controller class names must start with an uppercase letter. This example shows an invalid class name.

```php
<?php
class blog extends CI_Controller {

}
```

--------------------------------

### Rename Controller File Example

Source: https://codeigniter.com/userguide3/installation/upgrade_300.html

Controller filenames must start with a capital letter (Ucfirst) in CodeIgniter 3.0. This change is mandatory for all controller files.

```php
application/controllers/welcome.php
```

```php
application/controllers/Welcome.php
```

--------------------------------

### Download Helper - Loading and Usage

Source: https://codeigniter.com/userguide3/helpers/download_helper.html

Explains how to load the Download Helper and provides an example of using the `force_download` function to download data or an existing file.

```APIDOC
## Loading the Download Helper

This helper is loaded using the following code:
```php
$this->load->helper('download');
```

## Available Functions

### `force_download`

Generates server headers which force data to be downloaded to your desktop. Useful with file downloads.

#### Parameters

- **$filename** (string) - Required - The desired name for the downloaded file.
- **$data** (mixed) - Optional - The content of the file to be downloaded. If NULL and `$filename` is a readable file path, its content will be read.
- **$set_mime** (bool) - Optional - Whether to attempt to send the actual MIME type based on the filename extension.

#### Return Type

void

#### Request Example (Downloading Data)

```php
$data = 'Here is some text!';
$name = 'mytext.txt';
force_download($name, $data);
```

#### Request Example (Downloading an Existing File)

```php
// Contents of photo.jpg will be automatically read
force_download('/path/to/photo.jpg', NULL);
```

#### Request Example (Downloading with MIME Type)

```php
$data = 'Some binary data';
$name = 'archive.zip';
force_download($name, $data, TRUE);
```
```

--------------------------------

### Incorrect Class Naming Conventions

Source: https://codeigniter.com/userguide3/general/styleguide.html

Examples of incorrect class naming conventions that do not start with an uppercase letter or use CamelCase instead of underscores for separation.

```php
class superclass
class SuperClass
```

--------------------------------

### Get Clickable Smileys Example

Source: https://codeigniter.com/userguide3/helpers/smiley_helper.html

Returns an array of smiley images wrapped in clickable links. Requires the URL to the smiley directory and a field ID or alias.

```php
$image_array = get_clickable_smileys('http://example.com/images/smileys/', 'comment');


```

--------------------------------

### Application Package Directory Structure

Source: https://codeigniter.com/userguide3/libraries/loader.html

This example shows the typical directory structure for an application package named 'Foo Bar', which can contain configuration, helpers, language files, libraries, and models.

```text
/application/third_party/foo_bar

config/
helpers/
language/
libraries/
models/


```

--------------------------------

### Set Calendar Display Preferences

Source: https://codeigniter.com/userguide3/libraries/calendar.html

Customize the calendar's appearance by passing an array of preferences to the calendar library loading function. This example sets the start day, month type, and day type.

```php
$prefs = array(
        'start_day'    => 'saturday',
        'month_type'   => 'long',
        'day_type'     => 'short'
);

$this->load->library('calendar', $prefs);

echo $this->calendar->generate();
```

--------------------------------

### Database Configuration Example (SQLite)

Source: https://codeigniter.com/userguide3/database/configuration.html

Configuration for an SQLite database connection. The 'database' parameter should be the full path to the database file.

```php
$db['default']['dbdriver'] = 'sqlite';
$db['default']['database'] = APPPATH.'database/my_database.db';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### Database Configuration Example (SQL Server Native Client)

Source: https://codeigniter.com/userguide3/database/configuration.html

Configuration for connecting to SQL Server using the native client. The 'dbdriver' is set to 'sqlsrv'.

```php
$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'admin_user';
$db['default']['password'] = 'admin_password';
$db['default']['database'] = 'my_database';
$db['default']['dbdriver'] = 'sqlsrv';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### Retrieve GET or POST Data

Source: https://codeigniter.com/userguide3/libraries/input.html

Searches both GET and POST streams for the specified parameter, prioritizing GET. Optionally apply XSS filtering.

```php
$this->input->get_post(‘some_data’, TRUE);
```

--------------------------------

### Retrieve All GET Data

Source: https://codeigniter.com/userguide3/libraries/input.html

Call the get() method without parameters to retrieve all GET items. Use the second parameter to enable XSS filtering.

```php
$this->input->get(NULL, TRUE); // returns all GET items with XSS filter
```

```php
$this->input->get(NULL, FALSE); // returns all GET items without XSS filtering
```

--------------------------------

### Initializing the Utility Class

Source: https://codeigniter.com/userguide3/database/utilities.html

Demonstrates how to load the Database Utility Class. It can be loaded directly or with a specific database object.

```APIDOC
## Initializing the Utility Class

Important
In order to initialize the Utility class, your database driver must already be running, since the utilities class relies on it.
Load the Utility Class as follows:
```php
$this->load->dbutil();
```

You can also pass another database object to the DB Utility loader, in case the database you want to manage isn’t the default one:
```php
$this->myutil = $this->load->dbutil($this->other_db, TRUE);
```

In the above example, we’re passing a custom database object as the first parameter and then tell it to return the dbutil object, instead of assigning it directly to `$this->dbutil`.
Note
Both of the parameters can be used individually, just pass an empty value as the first one if you wish to skip it.
Once initialized you will access the methods using the `$this->dbutil` object:
```php
$this->dbutil->some_method();
```
```

--------------------------------

### Controller Example

Source: https://codeigniter.com/userguide3/helpers/smiley_helper.html

Example of how to use the Smileys helper and Table class within a CodeIgniter controller.

```APIDOC
## Controller Usage Example

### Description
This example demonstrates loading the smiley helper and table library, generating clickable smileys, and displaying them in a view.

### Method
GET

### Endpoint
/index.php/smileys/

### Request Body
None

### Response
HTML content displaying a form with a textarea and a table of clickable smileys.

### Request Example
```php
<?php

class Smileys extends CI_Controller {

        public function index()
        {
                $this->load->helper('smiley');
                $this->load->library('table');

                $image_array = get_clickable_smileys('http://example.com/images/smileys/', 'comments');
                $col_array = $this->table->make_columns($image_array, 8);

                $data['smiley_table'] = $this->table->generate($col_array);
                $this->load->view('smiley_view', $data);
        }

}
```
```

--------------------------------

### FTP Class Usage Examples

Source: https://codeigniter.com/userguide3/libraries/ftp.html

Provides practical examples of using the CodeIgniter FTP Class for common operations.

```APIDOC
## Usage Examples

In this example a connection is opened to the FTP server, and a local file is read and uploaded in ASCII mode. The file permissions are set to 755.

```php
$this->load->library('ftp');

$config['hostname'] = 'ftp.example.com';
$config['username'] = 'your-username';
$config['password'] = 'your-password';
$config['debug']        = TRUE;

$this->ftp->connect($config);

$this->ftp->upload('/local/path/to/myfile.html', '/public_html/myfile.html', 'ascii', 0775);

$this->ftp->close();
```

In this example a list of files is retrieved from the server.

```php
$this->load->library('ftp');

$config['hostname'] = 'ftp.example.com';
$config['username'] = 'your-username';
$config['password'] = 'your-password';
$config['debug']        = TRUE;

$this->ftp->connect($config);

$list = $this->ftp->list_files('/public_html/');

print_r($list);

$this->ftp->close();
```

In this example a local directory is mirrored on the server.

```php
$this->load->library('ftp');

$config['hostname'] = 'ftp.example.com';
$config['username'] = 'your-username';
$config['password'] = 'your-password';
$config['debug']        = TRUE;

$this->ftp->connect($config);

$this->ftp->mirror('/path/to/myfolder/', '/public_html/myfolder/');

$this->ftp->close();
```
```

--------------------------------

### CodeIgniter Tutorial

Source: https://codeigniter.com/userguide3/database/db_driver_reference.html

A step-by-step tutorial to help you build a simple application with CodeIgniter, covering static pages, a news section, and creating news items.

```APIDOC
## CodeIgniter Tutorial

### Description
Follow this tutorial to learn how to build a basic web application using CodeIgniter. It covers:
- Creating static pages
- Developing a news section
- Implementing functionality to create news items
- Conclusion and next steps
```

--------------------------------

### View Example

Source: https://codeigniter.com/userguide3/helpers/smiley_helper.html

Example of a CodeIgniter view file that utilizes the smiley_js function and displays the generated smiley table.

```APIDOC
## View Usage Example

### Description
This view file includes the necessary JavaScript for the smileys and displays the smiley table generated by the controller.

### Request Body
None

### Response
HTML content for the smiley view page.

### Request Example
```php
<html>
        <head>
                <title>Smileys</title>
                <?php echo smiley_js(); ?>
        </head>
        <body>
                <form name="blog">
                        <textarea name="comments" id="comments" cols="40" rows="4"></textarea>
                </form>
                <p>Click to insert a smiley!</p>
                <?php echo $smiley_table; ?> 
        </body>
</html>
```
```

--------------------------------

### Example CAPTCHA Image Tag

Source: https://codeigniter.com/userguide3/helpers/captcha_helper.html

This is an example of the HTML image tag that the create_captcha function generates for displaying the CAPTCHA.

```html
<img src="http://example.com/captcha/12345.jpg" width="140" height="50" />
```

--------------------------------

### Load Library with Configuration Options

Source: https://codeigniter.com/userguide3/libraries/loader.html

Pass configuration settings as an array to the second parameter of the `library()` method to customize library behavior.

```php
$config = array (
        'mailtype' => 'html',
        'charset'  => 'utf-8',
        'priority' => '1'
);

$this->load->library('email', $config);
```

--------------------------------

### Retrieve Specific GET Data

Source: https://codeigniter.com/userguide3/libraries/input.html

This method is identical to post(), but fetches GET data. Optionally apply XSS filtering.

```php
$this->input->get('some_data', TRUE);
```

--------------------------------

### News Controller Setup

Source: https://codeigniter.com/userguide3/tutorial/news_section.html

Defines the News controller, loading the news model and URL helper. Used for managing news display logic.

```php
<?php
class News extends CI_Controller {

        public function __construct()
        {
                parent::__construct();
                $this->load->model('news_model');
                $this->load->helper('url_helper');
        }

        public function index()
        {
                $data['news'] = $this->news_model->get_news();
        }

        public function view($slug = NULL)
        {
                $data['news_item'] = $this->news_model->get_news($slug);
        }
}


```

--------------------------------

### Example Controller with Constructor

Source: https://codeigniter.com/userguide3/general/controllers.html

This example shows a typical CodeIgniter controller class with a constructor that calls the parent constructor and includes custom logic.

```php
<?php
class Blog extends CI_Controller {

        public function __construct()
        {
                parent::__construct();
                // Your own constructor code
        }
}
```

--------------------------------

### Custom URI Pattern Example

Source: https://codeigniter.com/userguide3/general/routing.html

Demonstrates a URL prototype where the second segment represents a product ID instead of a method name, requiring custom routing.

```text
example.com/product/1/
example.com/product/2/
example.com/product/3/
example.com/product/4/
```

--------------------------------

### Get Request Method

Source: https://codeigniter.com/userguide3/libraries/input.html

Retrieves the HTTP request method (e.g., POST, GET). The method name can be returned in either uppercase or lowercase.

```php
echo $this->input->method(TRUE); // Outputs: POST
```

```php
echo $this->input->method(FALSE); // Outputs: post
```

```php
echo $this->input->method(); // Outputs: post
```

--------------------------------

### Initialize Redis Driver

Source: https://codeigniter.com/userguide3/libraries/caching.html

Load the Redis driver and save data. Requires Redis server and phpredis PHP extension.

```php
$this->load->driver('cache');
$this->cache->redis->save('foo', 'bar', 10);
```

--------------------------------

### Retrieve POST or GET Data

Source: https://codeigniter.com/userguide3/libraries/input.html

Searches both POST and GET streams for the specified parameter, prioritizing POST. Optionally apply XSS filtering.

```php
$this->input->post_get('some_data', TRUE);
```

--------------------------------

### Accessing GET Data

Source: https://codeigniter.com/userguide3/libraries/input.html

Retrieve GET data using this method. It safely checks for the existence of the item and returns NULL if it's not set.

```php
$this->input->get('something');
```

--------------------------------

### Load a Library

Source: https://codeigniter.com/userguide3/general/creating_libraries.html

Initialize a custom library named 'someclass' from a controller.

```php
$this->load->library('someclass');
```

--------------------------------

### Creating a Database

Source: https://codeigniter.com/userguide3/database/forge.html

Details how to create a new database using the `create_database()` method.

```APIDOC
## POST /dbforge/create_database

### Description
Creates a new database.

### Method
POST

### Endpoint
/dbforge/create_database

### Parameters
#### Path Parameters
- **db_name** (string) - Required - The name of the database to create.

### Request Body
```json
{
  "db_name": "new_database_name"
}
```

### Response
#### Success Response (200)
- **status** (boolean) - Indicates if the operation was successful.

#### Response Example
```json
{
  "status": true
}
```
```

--------------------------------

### Query Builder - Get Data

Source: https://codeigniter.com/userguide3/database/examples.html

Use the get() function to retrieve all results from a specified table. Iterate over the results using the result() method.

```php
$query = $this->db->get('table_name');

foreach ($query->result() as $row)
{
        echo $row->title;
}
```

--------------------------------

### Get URI Segments as Array - CodeIgniter

Source: https://codeigniter.com/userguide3/libraries/uri.html

Use `segment_array()` to get all URI segments as an array. This allows for easy iteration and access to individual segments.

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

foreach ($segs as $segment)
{
        echo $segment;
        echo '<br />';
}
```

--------------------------------

### Database Configuration Example (MS SQL Server)

Source: https://codeigniter.com/userguide3/database/configuration.html

Configuration for connecting to a Microsoft SQL Server database. The 'dbdriver' is set to 'mssql'.

```php
$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'admin_user';
$db['default']['password'] = 'admin_password';
$db['default']['database'] = 'my_database';
$db['default']['dbdriver'] = 'mssql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = FALSE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['encrypt'] = FALSE;
$db['default']['compress'] = FALSE;
$db['default']['stricton'] = FALSE;
$db['default']['failover'] = array();
$db['default']['save_queries'] = TRUE;
```

--------------------------------

### Rule Reference Example - CodeIgniter

Source: https://codeigniter.com/userguide3/libraries/form_validation.html

Provides an example of a common validation rule, 'is_unique', which checks if a field's value is unique in a specified database table.

```php
$this->form_validation->set_rules('email', 'Email', 'is_unique[users.email]');
```

--------------------------------

### Generate Table with Array Parameters

Source: https://codeigniter.com/userguide3/libraries/table.html

Similar to using discrete parameters, this example shows how to set headings and add rows using arrays, offering a more structured input method.

```php
$this->load->library('table');

$this->table->set_heading(array('Name', 'Color', 'Size'));

$this->table->add_row(array('Fred', 'Blue', 'Small'));
$this->table->add_row(array('Mary', 'Red', 'Large'));
$this->table->add_row(array('John', 'Green', 'Medium'));

echo $this->table->generate();

```

--------------------------------

### Create a Basic CodeIgniter Controller

Source: https://codeigniter.com/userguide3/general/controllers.html

This is a simple controller that outputs 'Hello World!'. Ensure the file is named 'Blog.php' with a capital 'B' and saved in the '_application/controllers/' directory. Class names must also start with an uppercase letter.

```php
<?php
class Blog extends CI_Controller {

        public function index()
        {
                echo 'Hello World!';
        }
}
```

--------------------------------

### Retrieve Multiple GET Parameters

Source: https://codeigniter.com/userguide3/libraries/input.html

Pass an array of keys to retrieve multiple GET parameters. Enable XSS filtering by setting the second parameter to TRUE.

```php
$this->input->get(array('field1', 'field2'));
```

```php
$this->input->get(array('field1', 'field2'), TRUE);
```

--------------------------------

### Get Routed URI String - CodeIgniter

Source: https://codeigniter.com/userguide3/libraries/uri.html

Use `ruri_string()` to get the URI string, considering any routing rules applied. This is useful when URI routing is enabled.

```php
echo $this->uri->ruri_string();
```

--------------------------------

### Number Helper - Loading and Usage

Source: https://codeigniter.com/userguide3/helpers/number_helper.html

Demonstrates how to load the Number Helper and provides an example of its primary function, byte_format.

```APIDOC
## Loading the Number Helper

This helper is loaded using the following code:

```php
$this->load->helper('number');
```

## Available Functions

### `byte_format`

**Description:** Formats numbers as bytes, based on size, and adds the appropriate suffix.

**Parameters:**
- **$num** (mixed) - Required - Number of bytes
- **$precision** (int) - Optional - Floating point precision

**Returns:** Formatted data size string (string)

**Examples:**
```php
echo byte_format(456);
// Returns: 456 Bytes

echo byte_format(4567);
// Returns: 4.5 KB

echo byte_format(45678);
// Returns: 44.6 KB

echo byte_format(456789);
// Returns: 447.8 KB

echo byte_format(3456789);
// Returns: 3.3 MB

echo byte_format(12345678912345);
// Returns: 1.8 GB

echo byte_format(123456789123456789);
// Returns: 11,228.3 TB

// With precision:
echo byte_format(45678, 2);
// Returns: 44.61 KB
```

**Note:** The text generated by this function is found in the following language file: `language/ <your_lang>/number_lang.php`
```

--------------------------------

### Controller Example with Array for Loops

Source: https://codeigniter.com/userguide3/general/views.html

This controller prepares a multi-dimensional array ('todo_list') to be passed to the view, enabling the creation of dynamic lists or tables.

```php
<?php
class Blog extends CI_Controller {

        public function index()
        {
                $data['todo_list'] = array('Clean House', 'Call Mom', 'Run Errands');

                $data['title'] = "My Real Title";
                $data['heading'] = "My Real Heading";

                $this->load->view('blogview', $data);
        }
}


```

--------------------------------

### Template Syntax Example

Source: https://codeigniter.com/userguide3/libraries/parser.html

This is an example of the pseudo-variable syntax used by the Template Parser Class. Variables are enclosed in braces, and variable pairs are denoted by opening and closing tags.

```html
<html>
        <head>
                <title>{blog_title}</title>
        </head>
        <body>
                <h3>{blog_heading}</h3>

        {blog_entries}
                <h5>{title}</h5>
                <p>{body}</p>
        {/blog_entries}

        </body>
</html>

```

--------------------------------

### Blogger API User Info Processing Example

Source: https://codeigniter.com/userguide3/libraries/xmlrpc.html

Example of a controller method processing a getUserInfo request for the Blogger API. It validates credentials and returns user data or an error.

```php
class My_blog extends CI_Controller {

        public function getUserInfo($request)
        {
                $username = 'smitty';
                $password = 'secretsmittypass';

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

                $parameters = $request->output_parameters();

                if ($parameters[1] != $username && $parameters[2] != $password)
                {
                        return $this->xmlrpc->send_error_message('100', 'Invalid Access');
                }

                $response = array(
                        array(
                                'nickname'  => array('Smitty', 'string'),
                                'userid'    => array('99', 'string'),
                                'url'       => array('http://yoursite.com', 'string'),
                                'email'     => array('jsmith@yoursite.com', 'string'),
                                'lastname'  => array('Smith', 'string'),
                                'firstname' => array('John', 'string')
                        ),
                         'struct'
                );

                return $this->xmlrpc->send_response($response);
        }
}
```

--------------------------------

### Create Database with Forge

Source: https://codeigniter.com/userguide3/database/forge.html

Use the `create_database` method to create a new database. Returns TRUE on success, FALSE on failure.

```php
if ($this->dbforge->create_database('my_db'))
{
        echo 'Database created!';
}
```

--------------------------------

### Trackback Ping URL Example

Source: https://codeigniter.com/userguide3/libraries/trackback.html

This is an example of a Ping URL format that external sites would use to send trackbacks to your application. The URL must include the entry ID.

```http
http://example.com/index.php/trackback/receive/entry_id


```

--------------------------------

### Example Pagination with Query String Reuse

Source: https://codeigniter.com/userguide3/libraries/pagination.html

Shows a pagination link that includes both URI segments and existing query string arguments.

```http
http://example.com/index.php/test/page/20?query=search%term
```

--------------------------------

### Specify Table for FROM Clause

Source: https://codeigniter.com/userguide3/database/query_builder.html

Use $this->db->from() to explicitly define the table for the FROM clause in your SQL query. This can be used in conjunction with $this->db->get() when the table name is not passed as a parameter to get().

```php
$this->db->select('title, content, date');
$this->db->from('mytable');
$query = $this->db->get();  // Produces: SELECT title, content, date FROM mytable
```

--------------------------------

### Load Form Validation Library

Source: https://codeigniter.com/userguide3/general/libraries.html

Example of initializing the Form Validation Library. Ensure the library is available in the system/libraries directory.

```php
$this->load->library('form_validation');
```

--------------------------------

### Load View with Return Option

Source: https://codeigniter.com/userguide3/libraries/loader.html

Use this method to load a view file. Set the third parameter to TRUE to return the view content as a string instead of sending it directly to the browser.

```php
$string = $this->load->view('myfile', '', TRUE);
```

--------------------------------

### GET /db/get_where

Source: https://codeigniter.com/userguide3/database/query_builder.html

Retrieves data from a table with a WHERE clause.

```APIDOC
## GET /db/get_where

### Description
Identical to `$this->db->get()` except that it permits you to add a “where” clause in the second parameter, instead of using the `db->where()` function.

### Method
GET

### Endpoint
/db/get_where

### Parameters
#### Query Parameters
- **table** (string) - Required - The name of the table to select from.
- **where_clause** (object) - Required - An object representing the WHERE clause conditions.
- **limit** (int) - Optional - The number of records to retrieve.
- **offset** (int) - Optional - The number of records to skip.

### Request Example
```json
{
  "table": "mytable",
  "where_clause": {"id": 123},
  "limit": 10,
  "offset": 20
}
```

### Response
#### Success Response (200)
- **query_result** (object) - An object containing the results of the query.

#### Response Example
```json
{
  "query_result": [
    { "id": 123, "title": "Example Title" }
  ]
}
```
```

--------------------------------

### Configure Multiple Applications with One CodeIgniter Installation

Source: https://codeigniter.com/userguide3/general/managing_apps.html

To manage multiple applications with a single CodeIgniter installation, structure your directories with each application in its own subdirectory (e.g., 'applications/foo', 'applications/bar'). Then, set the `$application_folder` variable in the main index.php to point to the desired application's directory.

```php
$application_folder = 'applications/foo';
```

--------------------------------

### Initialize XML-RPC Server Class

Source: https://codeigniter.com/userguide3/libraries/xmlrpc.html

Load both the XML-RPC and XML-RPC Server libraries. The server object will be available as $this->xmlrpcs.

```php
$this->load->library('xmlrpc');
$this->load->library('xmlrpcs');

```

--------------------------------

### Get File Info

Source: https://codeigniter.com/userguide3/helpers/file_helper.html

Retrieves specified information about a file.

```APIDOC
## get_file_info

### Description
Given a file and path, returns specified information attributes for a file.

### Method
`get_file_info($file, $returned_values = array('name', 'server_path', 'size', 'date'))`

### Parameters
#### Path Parameters
- **$file** (string) - Required - File path
- **$returned_values** (array) - Optional - What type of info to return (default: array('name', 'server_path', 'size', 'date'))
  - Valid options: name, size, date, readable, writeable, executable, fileperms

### Response
#### Success Response
- Returns: An array containing info on the specified file (array)

#### Failure Response
- Returns: FALSE on failure

### Request Example
```php
// Get default info
$file_info = get_file_info('some_file.txt');

// Get specific info
$specific_info = get_file_info('another_file.log', array('name', 'size'));
```
```

--------------------------------

### Creating a Custom XML-RPC Client and Server

Source: https://codeigniter.com/userguide3/libraries/xmlrpc.html

This section provides examples for creating both a custom XML-RPC client and a server. The client prepares and sends a request, while the server registers a method and processes the request.

```php
// The Client
$this->xmlrpc->method('examples.getStateName');
$this->xmlrpc->parameter('80');
$this->xmlrpc->send();

// The Server
$this->load->library('xmlrpc');
$this->xmlrpc->register_method('my.method', 'My_controller');
$this->xmlrpc->server_response();
```

--------------------------------

### Connect to FTP Server

Source: https://codeigniter.com/userguide3/libraries/ftp.html

Establishes a connection to the FTP server using provided configuration. Preferences can be set manually or stored in a config file.

```php
$this->load->library('ftp');

$config['hostname'] = 'ftp.example.com';
$config['username'] = 'your-username';
$config['password'] = 'your-password';
$config['port']     = 21;
$config['passive']  = FALSE;
$config['debug']    = TRUE;

$this->ftp->connect($config);
```

--------------------------------

### Get Filenames

Source: https://codeigniter.com/userguide3/helpers/file_helper.html

Retrieves an array of filenames from a specified directory.

```APIDOC
## get_filenames

### Description
Takes a server path as input and returns an array containing the names of all files contained within it.

### Method
`get_filenames($source_dir, $include_path = FALSE)`

### Parameters
#### Path Parameters
- **$source_dir** (string) - Required - Directory path
- **$include_path** (bool) - Optional - Whether to include the path as part of the filenames (default: FALSE)

### Response
#### Success Response
- Returns: An array of file names (array)

### Request Example
```php
$controllers = get_filenames(APPPATH.'controllers/');
```
```

--------------------------------

### Loading Multiple Language Files

Source: https://codeigniter.com/userguide3/libraries/language.html

Demonstrates loading multiple language files simultaneously by passing an array of filenames.

```php
$this->lang->load(array('filename1', 'filename2'));
```

--------------------------------

### Get Package Paths

Source: https://codeigniter.com/userguide3/libraries/loader.html

Returns an array of all currently available package paths.

```APIDOC
## GET /ci/loader/get_package_paths

### Description
Retrieves all currently available package paths.

### Method
GET

### Endpoint
/ci/loader/get_package_paths

### Parameters
#### Query Parameters
- **include_base** (bool) - Optional - Whether to include BASEPATH. Defaults to TRUE.

### Response
#### Success Response (200)
- **paths** (array) - An array of package paths.

### Response Example
```json
{
  "paths": [
    "/path/to/package1",
    "/path/to/package2"
  ]
}
```
```

--------------------------------

### Products Controller with Method Parameters

Source: https://codeigniter.com/userguide3/general/controllers.html

Demonstrates a controller method that accepts URI segments as parameters. The segments 'sandals' and 'id' are passed from the URI.

```php
<?php
class Products extends CI_Controller {

        public function shoes($sandals, $id)
        {
                echo $sandals;
                echo $id;
        }
}


```

--------------------------------

### Get Compiled Delete Statement

Source: https://codeigniter.com/userguide3/database/query_builder.html

Compiles a DELETE statement and returns it as a string.

```APIDOC
## GET COMPILED DELETE

### Description
Compiles a DELETE statement and returns it as a string.

### Method
`get_compiled_delete`

### Parameters
#### Path Parameters
- **$table** (string) - Table name
- **$reset** (bool) - Whether to reset the current QB values or not

### Returns
- **string** - The compiled SQL statement as a string
```