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How to use Laravel8 framework in php?
- PHPzOriginal
- 2023-05-31 17:40:541018browse
Laravel8 is one of the most popular open source web application frameworks for PHP, which was developed by Taylor Otwell. The framework is built on the PHP 7 language and has powerful features and easy-to-use syntax to help developers quickly build reliable and efficient web applications. In this article, we will introduce how to build web applications using Laravel8 framework.
Step 1: Install the Laravel8 framework
First, we need to install the Laravel8 framework on the local computer. Laravel8 can be easily installed using the Composer package manager and then added to our project via the command line.
Here are the steps to install Laravel8 from the command line:
- Install Composer on your local computer
- Create a new Laravel8 project
- Start the Laravel8 application
Enter the following in the command line:
composer create-project --prefer-dist laravel/laravel myproject cd myproject php artisan serve
Step 2: Understand the Laravel8 framework structure
The Laravel8 framework adopts MVC (Model-View -Controller) design pattern to organize the structure of the application. MVC divides the application into three main components: model, view and controller.
The model is responsible for operating the application's data. Eloquent ORM is used in Laravel8 to implement this function.
View displays the user interface of the application, usually using the Blade template engine.
The controller is responsible for handling user requests and routing, and sending the requests to the correct model handler and view renderer.
Step 3: Create Laravel8 Application
The next step in creating a Laravel8 application is to define routes. Routes specify the mapping between URL paths and controller functions, and the actions the controller should take.
In Laravel8, you can use the route definition prefix to specify the URL path of the route. For example, the following code shows how to define a route named "/test":
Route::get('/test', function () {
return view('test');
});The above code defines a route named "/test" and specifies that the route should display a route named "test. blade.php" Blade template view.
The Laravel8 framework supports HTTP verbs such as GET, POST, PUT and DELETE, etc., which makes it very easy to write and manage RESTful Web services.
Step 4: Using Blade Template Engine
Views in the Laravel8 framework are rendered through the Blade template engine. This template engine is based on PHP language and can be easily embedded into HTML.
Using Blade templates, you can easily create web interfaces from simple pages to complex applications. Here is a simple example of outputting a welcome message using the Blade template engine in Laravel8:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Welcome</title>
</head>
<body>
<h1>Welcome, {{ $name }}</h1>
</body>
</html>The above code creates a simple page with a title and a message that displays the value of a variable. The Laravel8 framework uses {{$name}} placeholders in templates to represent variables that should be populated.
Step 5: Use Eloquent ORM to operate the database
The Laravel8 framework provides a convenient way to operate the database, called Eloquent ORM. Eloquent ORM is an object-relational mapping technology that establishes a mapping between database tables and application data objects.
Using Eloquent ORM, you can easily perform database operations such as inserts, updates, deletes, and queries. The following is a simple example showing how to insert new records in the database using Eloquent ORM:
$user = new User; $user->name = 'John Doe'; $user->email = 'johndoe@example.com'; $user->save();
The above code creates a data model named "user" and specifies the values of the username and email fields. Call the save() function to insert the new user into the database.
Step 6: Use Laravel8 to create API
Laravel8 supports RESTful API creation and management, and you can use the software development kit (SDK) to call the API. The following is a simple example showing how to create an API in Laravel8:
// 定义路由和API操作
Route::get('/api/users', function () {
return User::all();
});
// 调用API操作
$response = $client->request('GET', 'http://localhost:8000/api/users');
$users = json_decode($response->getBody());The above code defines a route named "/api/users" and returns a data model named "User" . The API can then be called using client software and the response parsed into JSON using json_decode().
Conclusion
The Laravel8 framework provides PHP developers with a fast and efficient tool to build web applications. Using the Laravel8 framework's MVC structure, Blade template engine, and Eloquent ORM and other functions can simplify the development and maintenance of applications and improve the reliability and performance of web applications. If you haven't tried the Laravel 8 framework yet, now is a good time to start.
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