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.
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();
//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;
}
$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
$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
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
//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
Where to Declare Global Variables
$GLOBALS['primaryColor'] = '#FF00F0';
global $appName;
$appName= 'Color Picker';
CodeIgniter 3 HMVC error running on PHP 7
public function set_class($class)
{
$suffix = (string) $this->config->item('controller_suffix');
if ($suffix && strpos($class, $suffix) === FALSE) {
$class .= $suffix;
}
parent::set_class($class);
}
