CodeIgniter 4 How To Get Database Name Example Tutorial

Accessing database information, such as the database name, is essential for various tasks within a CodeIgniter 4 application.

Retrieving the database name dynamically allows developers to build adaptable applications that can work with different databases or perform specific operations based on the database in use. In this tutorial, we’ll see the process of retrieving the database name in CodeIgniter 4.

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Let’s get started.

CodeIgniter 4 Installation

To create a CodeIgniter 4 setup run this given command into your shell or terminal. Please make sure composer should be installed.

composer create-project codeigniter4/appstarter codeigniter-4

Assuming you have successfully installed application into your local system.

Create Database

To create a database, either we can create via Manual tool of PhpMyadmin or by means of a mysql command.

We will use MySQL command to create database. Run this command into Sql tab of PhpMyAdmin.

CREATE DATABASE codeigniter4_app;

Successfully, we have created a database.

Database Connection

Open .env file from project root.

Search for DATABASE. You should see the connection environment variables into it. Put your updated details of database connection string values.

 
#--------------------------------------------------------------------
# DATABASE
#--------------------------------------------------------------------

database.default.hostname = localhost
database.default.database = codeigniter4_app
database.default.username = admin
database.default.password = admin
database.default.DBDriver = MySQLi
database.default.DBPrefix =
database.default.port = 3306
  

Now, database successfully connected with the application.

Environment (.env) Setup

When we install CodeIgniter 4, we will have env file at root. To use the environment variables means using variables at global scope we need to do env to .env

Either we can do via renaming file as simple as that. Also we can do by terminal command.

Open project in terminal

cp env .env

Above command will create a copy of env file to .env file. Now we are ready to use environment variables.

Enable Development Mode

CodeIgniter starts up in production mode by default. You need to make it in development mode to see any error if you are working with application.

Open .env file from root.

# CI_ENVIRONMENT = production

 // Do it to 
 
CI_ENVIRONMENT = development

Now application is in development mode.

Method #1: Get Database Name Using Database::connect()

Back to project terminal and run this command to create a controller file.

php spark make:controller Site --suffix

Above command will create a file i.e SiteController.php inside /app/Controllers folder.

Open file and write this code into it.

<?php

namespace App\Controllers;

use App\Controllers\BaseController;

class SiteController extends BaseController
{
	public function index()
	{
		$db = \Config\Database::connect();

		$Database = $db->database;

		echo "Connected database name: " . $Database;
	}
}

Concept

$db = \Config\Database::connect();

$Database = $db->database;

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Output

Connected database name: codeigniter4_app

Method #2: Get Database Name Using env()

Open SiteController.php and write this code into it.

<?php

namespace App\Controllers;

use App\Controllers\BaseController;

class SiteController extends BaseController
{
	public function index()
	{
		$db = env("database.default.database");

		echo "Connected database name: " . $db;
	}
}

Concept

$db = env("database.default.database");

Output

Connected database name: codeigniter4_app

That’s it.

We hope this article helped you to learn CodeIgniter 4 How To Get Database Name Example Tutorial in a very detailed way.

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