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Are you looking for example of laravel 8 multiple database connection. This tutorial will give you simple example of multiple database connection in laravel 8. let’s discuss about laravel 8 multiple database connections .env. Here you will learn multiple db connection in laravel 8. Let's get started with multi database connection laravel 8.

I will give you step by step implementation of how to use laravel 8 multiple database connections using .env file. we will add configuration variable on .env file and use it to database configuration file. You can just follow me, i will also learn how to work with migration, model and database query for multiple database connection.

As we know sometime we need to use multiple database connection like mysql, mongodb etc. i can say when you work with large amount of project then you will need maybe. So let's follow bellow step.

Set ENV Variable:

Here, you need to set configuration variable on .env file. let's create as bellow:

.env

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=mydatabase
DB_USERNAME=root
DB_PASSWORD=root
   
DB_CONNECTION_SECOND=mysql
DB_HOST_SECOND=127.0.0.1
DB_PORT_SECOND=3306
DB_DATABASE_SECOND=mydatabase2
DB_USERNAME_SECOND=root
DB_PASSWORD_SECOND=root

Use ENV Variable:

Now, as we created variable in env file, we need to use that variable on config file so let's open database.php file and add new connections key as like bellow:

config/database.php

<?php
  
use Illuminate\Support\Str;
  
return [
   
    'default' => env('DB_CONNECTION', 'mysql'),
   
    'connections' => [
        .....
   
        'mysql' => [
            'driver' => 'mysql',
            'url' => env('DATABASE_URL'),
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'unix_socket' => env('DB_SOCKET', ''),
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => true,
            'engine' => null,
            'options' => extension_loaded('pdo_mysql') ? array_filter([
                PDO::MYSQL_ATTR_SSL_CA => env('MYSQL_ATTR_SSL_CA'),
            ]) : [],
        ],
        'mysql2' => [
            'driver' => env('DB_CONNECTION_SECOND'),
            'host' => env('DB_HOST_SECOND', '127.0.0.1'),
            'port' => env('DB_PORT_SECOND', '3306'),
            'database' => env('DB_DATABASE_SECOND', 'forge'),
            'username' => env('DB_USERNAME_SECOND', 'forge'),
            'password' => env('DB_PASSWORD_SECOND', ''),
            'unix_socket' => '',
            'charset' => 'utf8mb4',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'prefix_indexes' => true,
            'strict' => true,
            'engine' => null,
        ],
.....        

Use Database Multiple Connection:

Here, i will give you simple example of how you can use as multiple connection:

Database Connection with migration

Default:

<?php
.....
public function up()
{
    Schema::create('blog', function (Blueprint $table) {
        $table->increments('id');
        $table->string('title');
        $table->string('body')->nullable();
        $table->timestamps();
    });
}
.....

Second:

<?php
.....
public function up()
{
    Schema::connection('mysql2')->create('blog', function (Blueprint $table) {
        $table->increments('id');
        $table->string('title');
        $table->string('body')->nullable();
        $table->timestamps();
    });
}
.....

Database Connection with model

Default:

<?php
   
namespace App;
  
use Illuminate\Database\Eloquent\Model;
   
class Blog extends Model
{
}

Second:

<?php
   
namespace App;
  
use Illuminate\Database\Eloquent\Model;
   
class Blog extends Model
{
    protected $connection = 'mysql2';
}

Database Connection in Controller

Default:

<?php
  
class BlogController extends BaseController
{
    public function getRecord()
    {
        $blogModel = new Blog;
        $find = $blogModel->find(1);
        return $find;
    }
}

Second:

<?php
  
class BlogController extends BaseController
{
    public function getRecord()
    {
        $blogModel = new Blog;
        $blogModel->setConnection('mysql2');
        $find = $blogModel->find(1);
        return $find;
    }
}

Database Connection with Query Builder

Default:

$blogs = DB::table("blog")->get();
print_r($blogs);

Second:

$blogs = DB::connection('mysql2')->table("blog")->get();
print_r($blogs);

I hope it can help you...