How to install laravel composer

Laravel is a Web application framework developed based on PHP language. It adopts many advanced technologies and design ideas, bringing a lot of convenience to Web development. Laravel relies on Composer for package management, making it easy to install and update dependencies. This article will introduce how to install Laravel using Composer.

1. Install Composer

Before using Composer to install Laravel, you first need to install Composer on your local machine. The simplest installation method is to install using the system package manager, such as using the following command on Ubuntu:

sudo apt-get update
sudo apt-get install composer

After the installation is complete, you can verify whether the installation was successful by running the following command:

composer --version

2. Creating a Laravel project

After installing Composer, you can start creating a Laravel project. You can create a project by running the following command:

composer create-project --prefer-dist laravel/laravel project-name

where project-name is the name of the project, which can be modified according to your own needs. After the project is created, you can run the following command to enter the project directory:

cd project-name

3. Configure the database

After creating the Laravel project, you need to configure the database. In the project root directory, you can find the .env.example file and copy it as a .env file. Then open the .env file and find the following code:

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=homestead
DB_USERNAME=homestead
DB_PASSWORD=secret

Modify it to your own database information.

4. Generate application key

In the project, you need to generate an application key. It can be generated through the following command:

php artisan key:generate

5. Running Laravel service

After completing the above steps, you can run the Laravel service through the following command:

php artisan serve

After running successfully, you can access the address in the browser to view Laravel's welcome page.

6. Installing Laravel extensions

Laravel has many commonly used extensions pre-installed, but some extensions may need to be installed manually. Laravel extensions can be installed through Composer. For example, if you need to install Laravel's debugbar extension, you can run the following command:

composer require barryvdh/laravel-debugbar

After the installation is complete, you need to add the following code to the config/app.php file to reference the extension:

'providers' => [
    // ...
    Barryvdh\Debugbar\ServiceProvider::class,
    // ...
],

'aliases' => [
    // ...
    'Debugbar' => Barryvdh\Debugbar\Facade::class,
    // ...
],

The extension can then be called in code using the following code:

Debugbar::info($someVariable);

7. Summary

Installing Laravel using Composer is very convenient and fast. You can create projects, install dependencies and extensions, generate application keys, and a range of development tasks with simple commands. In the actual development process, Laravel provides developers with many excellent functions and tools, which allows the development team to carry out development work more efficiently.

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