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Quality, Reliability & Service

Open Source Yii2

Yii Multiple Apps

Byarchman007

Feb 7, 2025

USA

What is YII2?

Install Yii2 Basic App

Run:

bash
composer create-project --prefer-dist yiisoft/yii2-app-basic yii2-sharable
cd yii2-sharable

Configure MariaDB Connection

Edit config/db.php:

php
return [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=127.0.0.1;dbname=yii_shared_db',
'username' => 'root', // Change as needed
'password' => '',
'charset' => 'utf8mb4',
];

2. Define a Sharable Model & Migration

Instead of relying on pre-existing database tables, use migrations for portability.

Create Migration for post Table

Run:

bash
php yii migrate/create create_post_table

Then, edit migrations/mXXXX_create_post_table.php:

php
use yii\db\Migration;

class mXXXX_create_post_table extends Migration
{
public function safeUp()
{
$this->createTable('post', [
'id' => $this->primaryKey(),
'title' => $this->string()->notNull(),
'content' => $this->text()->notNull(),
'created_at' => $this->timestamp()->defaultExpression('CURRENT_TIMESTAMP'),
]);
}

public function safeDown()
{
$this->dropTable('post');
}
}

Run the migration:

bash
php yii migrate

Generate the Model

bash
php yii gii/model --tableName=post --modelClass=Post

3. Setup Controller and Views

Create Controller

controllers/PostController.php

php
namespace app\controllers;

use app\models\Post;
use yii\web\Controller;
use yii\web\NotFoundHttpException;

class PostController extends Controller
{
public function actionIndex()
{
$posts = Post::find()->all();
return $this->render('index', compact('posts'));
}

public function actionView($id)
{
return $this->render('view', ['post' => $this->findModel($id)]);
}

protected function findModel($id)
{
if (($model = Post::findOne($id)) !== null) {
return $model;
}
throw new NotFoundHttpException('The requested post does not exist.');
}
}

Create Views

  • views/post/index.php
php
<?php foreach ($posts as $post): ?>
<h2><a href="<?= \yii\helpers\Url::to(['post/view', 'id' => $post->id]) ?>"><?= $post->title ?></a></h2>
<p><?= $post->content ?></p>
<?php endforeach; ?>
  • views/post/view.php
php
<h1><?= $post->title ?></h1>
<p><?= $post->content ?></p>

4. Share the Application

Package it for Sharing

  1. Exclude Unnecessary Files: Add a .gitignore file:
    bash
    /vendor/
    /runtime/
    /web/assets/
  2. Include composer.lock to lock dependencies.
  3. Ensure Migrations Exist (migrations/ folder).

Sharing Methods

  • Git Repository: Push to a Git repo.
  • Zip Archive: Compress & distribute.
  • Dockerize: Create a docker-compose.yml for MariaDB.

5. Install on Another Machine

To deploy:

bash
git clone <repo_url> yii2-sharable
cd yii2-sharable
composer install
php yii migrate
php yii serve

Visit: http://localhost:8080/index.php?r=post

Now you have a sharable Yii2 app with MariaDB, a basic model, and migrations for easy deployment!

4o
You said:
create yii2 app with maria db basic model multiple yii2 apps share overhead files
ChatGPT said:

To create multiple Yii2 applications that share overhead files (framework, extensions, and vendor dependencies) while using MariaDB with a basic model, follow these steps:

1. Setup a Shared Yii2 Framework Directory

Instead of installing Yii2 for each app separately, create a shared directory:

Install Yii2 Framework Once

bash
mkdir yii2-shared
cd yii2-shared
composer create-project --prefer-dist yiisoft/yii2-app-basic shared-framework

This shared-framework/ directory will store the Yii2 framework and vendor files.

2. Create Multiple Yii2 Apps Using Shared Framework

Create two Yii2 apps (app1 and app2) without installing Yii2 dependencies separately.

bash
mkdir -p apps/app1 apps/app2
cp -r shared-framework/{config,web,commands,views,models,controllers} apps/app1/
cp -r shared-framework/{config,web,commands,views,models,controllers} apps/app2/

Now, app1 and app2 contain only app-specific files, while shared-framework holds the common files.

3. Modify Each Yii2 App to Use the Shared Framework

Update apps/app1/index.php and apps/app2/index.php:

php
<?php
// Define shared framework path
$sharedFrameworkPath = dirname(__DIR__, 2) . '/shared-framework';

require $sharedFrameworkPath . '/vendor/autoload.php';
require $sharedFrameworkPath . '/vendor/yiisoft/yii2/Yii.php';

$config = require $sharedFrameworkPath . '/config/web.php';

(new yii\web\Application($config))->run();

This ensures both apps use the same Yii2 framework and vendor files.

4. Configure MariaDB Database for Each App

Modify apps/app1/config/db.php and apps/app2/config/db.php:

For app1:

php
return [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=127.0.0.1;dbname=app1_db',
'username' => 'root',
'password' => '',
'charset' => 'utf8mb4',
];

For app2:

php
return [
'class' => 'yii\db\Connection',
'dsn' => 'mysql:host=127.0.0.1;dbname=app2_db',
'username' => 'root',
'password' => '',
'charset' => 'utf8mb4',
];

5. Create a Shared Model (Optional)

Instead of separate models for each app, create a shared model:

Move models/Post.php to shared-framework/models/Post.php and update apps/app1/models/Post.php and apps/app2/models/Post.php:

php
<?php
namespace app\models;

require dirname(__DIR__, 2) . '/shared-framework/models/Post.php';

class Post extends \app\shared\models\Post {}

Now, both apps use the same Post model from the shared framework.

6. Setup Shared Migrations

Use database migrations for both apps but store them in the shared framework:

bash
mkdir shared-framework/migrations
php yii migrate/create --migrationPath=shared-framework/migrations create_post_table

Edit mXXXX_create_post_table.php:

php
use yii\db\Migration;

class mXXXX_create_post_table extends Migration
{
public function safeUp()
{
$this->createTable('post', [
'id' => $this->primaryKey(),
'title' => $this->string()->notNull(),
'content' => $this->text()->notNull(),
'created_at' => $this->timestamp()->defaultExpression('CURRENT_TIMESTAMP'),
]);
}

public function safeDown()
{
$this->dropTable('post');
}
}

Run migration separately for each app:

bash
php yii migrate --migrationPath=shared-framework/migrations --db=app1_db
php yii migrate --migrationPath=shared-framework/migrations --db=app2_db

7. Run Multiple Yii2 Apps

Start the first app:

bash
cd apps/app1
php yii serve --port=8081

Start the second app:

bash
cd ../app2
php yii serve --port=8082

Visit:

  • http://localhost:8081/index.php?r=post
  • http://localhost:8082/index.php?r=post

8. Summary

  • shared-framework/ contains Yii2 core files, vendor libraries, models, and migrations.
  • apps/app1/ and apps/app2/ contain only configuration and application-specific files.
  • Single Yii2 installation is shared across multiple apps, reducing overhead.

Mr. Arch Brooks, Software Engineer, Brooks Computing Systems, LLC authored this article.

By archman007

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