CodeIgniter Code Snippets

CodeIgniter is a powerful open-source PHP framework used for rapid web development. It is known for its simple and elegant syntax, as well as its flexibility and ability to scale. CodeIgniter has a wide range of built-in libraries and helpers that make common tasks easier, and its documentation is excellent.

However, because of its minority, finding quality CodeIgniter code snippets can be a challenge. To help make your life easier, we have curated a list of the best CodeIgniter code snippets. These snippets are hand-picked and organized by category, so you can easily find what you need.

Table of Contents

Database

Connect to Multiple Databases —

$db['default'] = array(
	'dsn'	=> '',
	'hostname' => '192.168.1.3',
	'username' => 'user2',
	'password' => 'passpass',
	'database' => 'database2',
	'dbdriver' => 'mysqli',
	'dbprefix' => '',
	'pconnect' => FALSE,
	'db_debug' => (ENVIRONMENT !== 'production'),
	'cache_on' => FALSE,
	'cachedir' => '',
	'char_set' => 'utf8',
	'dbcollat' => 'utf8_general_ci',
	'swap_pre' => '',
	'encrypt' => FALSE,
	'compress' => FALSE,
	'stricton' => FALSE,
	'failover' => array(),
	'save_queries' => TRUE
);
//query
$db = $this->load->database('seconddatabase', TRUE);
$query = $db->select('*')->from('article')->where($conditions)->order_by('id', 'DESC')->get();
$result = $query->result();

Count Query Results —

//num_rows()
$this->db->select('count(*)');
$this->db->from('students');
$this->db->where('class_id', '7');
$query = $this->db->get();
echo $query->num_rows();
//use count_all_results()
$this->db->select('*');
$this->db->from('comments');
$this->db->where('comment LIKE', '%developers%');
$counter = $this->db->count_all_results();

Duplicate a Record Based on Id —

function duplicate($id, $count) {
    $this->db->where('id', $id);
    $query = $this->db->get($table);
    foreach ($query->result() as $row){
        foreach($row as $key => $val){
            if($key != 'id'){                
                $this->db->set($key, $val);
            }
        }
    }        
    $result = array();
    for ($i=0; $i < $count; $i++) { 
        $result[] = $this->db->insert($table);
    }

    return $result;
}

Get the Last Inserted ID —

$this->db->set('website', 'tleapps.com');
$this->db->set('type', 'blog');
$inserted = $this->db->insert("table_website");
if($inserted){
    $last_id = $this->db->insert_id();
}

Debug & Profiling

Generate Dummy Data —

$faker = Faker\Factory::create();

echo $faker->numberBetween(10, 1000);
echo $faker->email;
echo $faker->username;
echo $faker->hexcolor();
echo $faker->phoneNumber;
echo $faker->unixTime();

Form

Upload Multiple Files —

class FileManager extends MY_Controller {

	public function __construct()
	{
		parent::__construct();
	}

	/*
	** Upload images
	*/
	public function upload(){

		/* Form Helpers */
		$this->load->helper('form');
		$this->load->library('form_validation');

		if ($this->form_validation->run() == TRUE){

			$description = $this->input->post('description');

			//Upload images
			$upload_folder = date('Ym');
			$config['upload_path'] = './uploads/'.$upload_folder;
			$config['allowed_types'] = 'gif|jpg|jpeg|png';
			$config['max_size'] = 20480;
			$config['max_width'] = 10240;
			$config['max_height'] = 10240;
			$config['file_ext_tolower'] = TRUE;

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

			if (!is_dir('./uploads/' . $upload_folder)) {
				mkdir('./uploads/' . $upload_folder, 0777, true);
			}

			if(isset($_FILES['images']) && $_FILES['images']['name'][0] != ""){
				$files_count = count($_FILES['images']['name']);
				for($i = 0; $i < $files_count; $i++){
				$_FILES['image']['name'] = $_FILES['images']['name'][$i];
				$_FILES['image']['type'] = $_FILES['images']['type'][$i];
				$_FILES['image']['tmp_name'] = $_FILES['images']['tmp_name'][$i];
				$_FILES['image']['error'] = $_FILES['images']['error'][$i];
				$_FILES['image']['size'] = $_FILES['images']['size'][$i];

				if($this->upload->do_upload('image')){
					$image = $this->upload->data();
					//insert database or other task goes here
				} else {
					echo $this->upload->display_errors();
					die;
				}			

			}

		} else {

			$this->data['message'] = (validation_errors()) ? validation_errors() : $this->session->flashdata('message');
			$this->data['message_type'] = 'warning';

			$this->data['description'] = array(
			'name' => 'description',
			'id' => 'description',
			'rows' => 5,
			'cols' => 60,
			'value' => $this->form_validation->set_value('description'),
			'class' => 'form-control',
			);

			/* Load Template */
			$this->load->view('file/upload', $this->data);
		}
	}	

}

Get a Form's GET and POST Data —

//get
$name= $this->input->get('name');
$description = $this->input->get('description');
$password = $_GET['password'];
$country = $_GET['country'];

//post
$id = $this->input->post('id');
$validationCode = $this->input->post('validationCode');
$token = $_POST['token'];
$hash = $_POST['hash'];

Use is_unique in Form Update Validation —

if(trim($user->zipcode) != trim($this->input->post('zipcode'))){
    $this->form_validation->set_rules('zipcode', 'Zip', 'required|is_unique[user.zipcode]');
} else {
    $this->form_validation->set_rules('zipcode', 'Zip', 'required');
}

Menu & Navigation

Generate Dynamic Sitemap —

//controller
class Sitemap extends CI_Controller {    
    public function index()
    {
        $this->load->database();
        $query = $this->db->get("articles");
        $data['articles'] = $query->result();

        $this->load->view('sitemap', $data);
    }
}
//view
<?xml version="1.0" encoding="UTF-8">
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
    <url>
        <loc><?php echo base_url();?></loc>
        <priority>1.0</priority>
        <changefreq>daily</changefreq>
    </url>
    
    <?php foreach($articles as $article) { ?>
    <url>
        <loc><?php echo base_url()."article/".$article->id ?></loc>
        <lastmod><?php echo date('c', $article->date); ?></lastmod>     
        <changefreq>daily</changefreq>
        <priority>1</priority>
    </url>
    <?php } ?>
</urlset>

Convert Title to URL Slug —

$title = "CodeIgniter Can Be Used to Make a Blog Platform";
$url_title = url_title($title, '-', true);
//output: codeigniter-can-be-used-to-make-a-blog-platform

Troubleshoot

CodeIgniter 3 HMVC error running on PHP 7 —

public function set_class($class)
    {
        $suffix = (string) $this->config->item('controller_suffix');
        if ($suffix && strpos($class, $suffix) === FALSE) {
            $class .= $suffix;
        }

        parent::set_class($class);
    }

Variable

Where to Declare Global Variables —

$GLOBALS['primaryColor'] = '#FF00F0';

global $appName;
$appName= 'Color Picker';