Hi Dev,

This tutorial will provide example of country state city dynamic dependent select box in laravel ajax. This tutorial will give you simple example of How to country state city dynamic dependent select box in laravel. you will learn state and city list in laravel 9. you can understand a concept of how to country state city dynamic dependent dropdown using Ajax and laravel 9.

So, let's start the below example

First of all let us begin the tutorial by installing a new laravel application. if you have already created the project, then skip following step.

composer create-project laravel/laravel example-app

In this second step lets create a MySQL database and connect it with laravel application. After creating database we need to set database credential in application’s .env file.

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=Enter_Your_Database_Name
DB_USERNAME=Enter_Your_Database_Username
DB_PASSWORD=Enter_Your_Database_Password

In this section now we need to create model and migration file and follow this bellow code.

php artisan make:model Country
php artisan make:model State
php artisan make:model City

php artisan make:migration create_country_state_city_tables

Next, Navigate to database/migrations directory and open create_country_state_city_tables.php. Then update the following code into create_country_state_city_tables.php file, as follow:

<?php
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

return new class extends Migration
{
    public function up()
    {
        Schema::create('countries', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->timestamps();
        });
        Schema::create('states', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->integer('country_id');            
            $table->timestamps();
        });
        Schema::create('cities', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->integer('state_id');            
            $table->timestamps();
        });
    }
   public function down()
    {
       Schema::drop('countries');
       Schema::drop('states');
       Schema::drop('cities');
    }
};

Now, run the migration to create database table using following artisan command:

php artisan migrate

Here we are ready to we need to define routes in “routes/web.php” file.

<?php

use App\Http\Controllers\CountryStateCityController;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('country-state-city','CountryStateCityController@index');
Route::post('get-states-by-country','CountryStateCityController@getState');
Route::post('get-cities-by-state','CountryStateCityController@getCity');

<?php
 
namespace App\Http\Controllers;
 
use Illuminate\Http\Request;
use Validator,Redirect,Response;
use App\Models\Country;
use App\Models\State;
use App\Models\City;
 
class CountryStateCityController extends Controller
{
    
    /**
     * Write code on Method
     *
     * @return response()
     */
    public function index()
    {
        $data['countries'] = Country::get(["name","id"]);
        return view('index',$data);
    }

    /**
     * Write code on Method
     *
     * @return response()
     */
    public function getState(Request $request)
    {
        $data['states'] = State::where("country_id",$request->country_id)
                    ->get(["name","id"]);
        return response()->json($data);
    }

    /**
     * Write code on Method
     *
     * @return response()
     */
    public function getCity(Request $request)
    {
        $data['cities'] = City::where("state_id",$request->state_id)
                    ->get(["name","id"]);
        return response()->json($data);
    }
 
}

<!DOCTYPE html>
<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
<head>
    <meta charset="utf-8">
    <meta name="csrf-token" content="content">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta name="csrf-token" content="{{ csrf_token() }}">
    <title>Laravel PHP Ajax Country State City Dropdown List</title>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" >
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
</head>
<body>
<div class="container mt-5">
    <div class="row justify-content-center">
        <div class="col-md-8">
            <div class="card">
                <div class="card-header">
                    <h2 class="text-success">Laravel Country State City Dependent Dropdown List with Ajax - MyWebtuts.com</h2>
                </div>
                <div class="card-body">
                    <form>
                        <div class="form-group">
                            <label for="country">Country</label>
                            <select class="form-control" id="country-dropdown">
                                <option value="">Select Country</option>
                                @foreach ($countries as $country) 
                                <option value="{{$country->id}}">
                                {{$country->name}}
                                </option>
                                @endforeach
                            </select>
                        </div>
                    <div class="form-group">
                        <label for="state">State</label>
                        <select class="form-control" id="state-dropdown">
                        </select>
                    </div>                        
                    <div class="form-group">
                        <label for="city">City</label>
                        <select class="form-control" id="city-dropdown">
                        </select>
                    </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
<script>
$(document).ready(function() {
    /*------------------------------------------
    --------------------------------------------
    About 
    --------------------------------------------
    --------------------------------------------*/
    $('#country-dropdown').on('change', function() {
        var country_id = this.value;
        $("#state-dropdown").html('');
        $.ajax({
            url:"{{url('get-states-by-country')}}",
            type: "POST",
            data: {
            country_id: country_id,
            _token: '{{csrf_token()}}' 
            },
            dataType : 'json',
            success: function(result){
                $('#state-dropdown').html('<option value="">Select State</option>'); 
                $.each(result.states,function(key,value){
                $("#state-dropdown").append('<option value="'+value.id+'">'+value.name+'</option>');
                });
                $('#city-dropdown').html('<option value="">Select State First</option>'); 
            }
        });
    });

    /*------------------------------------------
    --------------------------------------------
    About 
    --------------------------------------------
    --------------------------------------------*/
    $('#state-dropdown').on('change', function() {
        var state_id = this.value;
        $("#city-dropdown").html('');
        $.ajax({
            url:"{{url('get-cities-by-state')}}",
            type: "POST",
            data: {
            state_id: state_id,
            _token: '{{csrf_token()}}' 
            },
            dataType : 'json',
            success: function(result){
                $('#city-dropdown').html('<option value="">Select City</option>'); 
                $.each(result.cities,function(key,value){
                $("#city-dropdown").append('<option value="'+value.id+'">'+value.name+'</option>');
                });
            }
        });
    });
});
</script>
</body>
</html>

All steps have been done, now you have to type the given command and hit enter to run the laravel app:

php artisan serve

Now, you have to open web browser, type the given URL and view the app output:

http://localhost:8000/country-state-city

It will help you...