Codeigniter 4 Autocomplete Textbox From Database using Typeahead JS

Codeigniter 4 Autocomplete Textbox From Database using Typeahead JS

Autocomplete textbox search from database in codeigniter 4 using jQuery Typeahead js. In this tutorial, you will learn how to implement an autocomplete search or textbox search with database using jquery typehead js example.

This tutorial will show you step by step how to implement autocomplete search from database in codeigniter 4 app using typeahead js.

Autocomplete textbox in CodeIgniter 4 using jQuery typeahead Js From Database

Let’s follow the following steps to implement autocomplete textbox from database using Typehead js in CodeIgniter 4 apps:

  • Download Codeigniter Latest
  • Basic Configurations
  • Create Table in Database
  • Setup Database Credentials
  • Create Controller
  • Create View
  • Create Route
  • Start Development Server

Step 1: Download Codeigniter Project

In this step, you will download the latest version of Codeigniter 4, Go to this link Download Codeigniter 4 fresh new setup and unzip the setup in your local system xampp/htdocs/ . And change the download folder name “demo”

Step 2: Basic Configurations

Next, you will set some basic configuration on the app/config/app.php file, so let’s go to application/config/config.php and open this file on text editor.

Set Base URL like this

public $baseURL = 'http://localhost:8080';
public $baseURL = 'http://localhost/demo/';

Step 3: Create Table in Database

In this step, you need to create table in database and as well as insert some data to implement an autocomplete search app in codeiginter 4. So visit your phpmyadmin panel and execute the following sql query in it:

    id int(11) NOT NULL AUTO_INCREMENT COMMENT 'Primary Key',
    name varchar(100) NOT NULL COMMENT 'Name',
    PRIMARY KEY (id)
  ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='datatable demo table' AUTO_INCREMENT=1;
INSERT INTO `users` (`id`, `name`) VALUES
(1, 'John Doe'),
(2, 'Vanya'),
(3, 'Luther'),
(4, 'Diego'),
(5, 'Klaus'),
(6, 'Ben'),
(7, 'Handler'),
(8, 'Dexter'),
(9, 'Mask'),
(10, 'Aladin');

Step 4: Setup Database Credentials

In this step, you need to connect our project to the database. you need to go app/Config/Database.php and open database.php file in text editor. After opening the file in a text editor, you need to set up database credentials in this file like below.

	public $default = [
		'DSN'      => '',
		'hostname' => 'localhost',
		'username' => 'root',
		'password' => '',
		'database' => 'demo',
		'DBDriver' => 'MySQLi',
		'DBPrefix' => '',
		'pConnect' => false,
		'DBDebug'  => (ENVIRONMENT !== 'production'),
		'cacheOn'  => false,
		'cacheDir' => '',
		'charset'  => 'utf8',
		'DBCollat' => 'utf8_general_ci',
		'swapPre'  => '',
		'encrypt'  => false,
		'compress' => false,
		'strictOn' => false,
		'failover' => [],
		'port'     => 3306,

Step 5: Create Controller

In this step, Visit app/Controllers and create a controller name AutocompleteSearch.php. In this controller, you need to add the following methods into it:

<?php namespace App\Controllers;
use CodeIgniter\Controller;
use CodeIgniter\HTTP\RequestInterface;

class AutocompleteSearch extends Controller

    public function index() {
        return view('home');
    public function ajaxSearch()
        helper(['form', 'url']);

        $data = [];

        $db      = \Config\Database::connect();
        $builder = $db->table('users');   

        $query = $builder->like('name', $this->request->getVar('q'))
                    ->select('id, name as text')
        $data = $query->getResult();
		echo json_encode($data);


Step 6: Create View

In this step, you need to create one view files name home.php and update the following code into your file:

<html lang="en">
    <title>Codeigniter 4 - jquery ajax autocomplete search using typeahead example-</title>  
    <link rel="stylesheet" href="" />
    <script src="//"></script>
    <script src=""></script>  

<div class="container">
    <h1>Codeigniter 4 - jquery ajax autocomplete search using typeahead example-</h1>
    <input class="typeahead form-control" type="text">

<script type="text/javascript">
        source:  function (query, process) {
        return $.get('/AutocompleteSearch/ajaxSearch', { query: query }, function (data) {
                data = $.parseJSON(data);
                return process(data);


Step 7: Create Route

In this step, you need to create a route that renders the table into the view, place the following code in app/Config/Routes.php file.

$routes->get('/', 'AutocompleteSearch::index');

Step 8: Start Development Server

In this step, open your terminal and execute the following command to start development sever:

php spark serve

Then, Go to the browser and hit below the URL:



In this Codeigniter 4 autocomplete search using jquery typeahead js example. In this tutorial you have successfully learned how to make autocomplete search using typeahead js in codeigniter 4.

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My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

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