Skip to main content

Phalcon-Micro Overview

Phalcon-Micro Overview.

Introduction​

Phalcon Micro is a lightweight PHP framework that allows developers to build web applications quickly and efficiently. It is a part of the Phalcon framework, which is known for its high performance and low resource consumption. Phalcon Micro is designed to be simple and easy to use, making it an excellent choice for small to medium-sized projects.

History​

Phalcon Micro was first introduced in 2015 as a separate component of the Phalcon framework. It was created to address the need for a lightweight and fast framework that can handle small projects without the overhead of a full-fledged framework. Since its release, Phalcon Micro has gained popularity among developers due to its simplicity and performance.

Features​

1. Routing​

Phalcon Micro provides a powerful routing system that allows developers to define custom routes for their applications. Routing is an essential feature for any web framework as it determines how URLs are mapped to controllers and actions. Here's an example of how to define a route in Phalcon Micro:

$app->get('/hello/{name}', function ($name) use ($app) {
    echo "Hello, " . $name . "!";
});

In this example, the /hello/{name} route matches any URL starting with /hello/ followed by a parameter name. The corresponding function then echoes a personalized greeting.

2. Middleware​

Middleware is a powerful feature that allows developers to perform actions before and after the execution of a controller action. It can be used for authentication, logging, input validation, and more. Phalcon Micro provides a middleware system that can be easily integrated into the application. Here's an example of how to define middleware in Phalcon Micro:

$app->before(function () {
    // Perform actions before executing a controller action
});

$app->after(function () {
    // Perform actions after executing a controller action
});

In this example, the before and after functions define middleware that will be executed before and after each controller action, respectively.

3. Dependency Injection​

Phalcon Micro includes a powerful dependency injection (DI) container that allows developers to manage the dependencies of their application easily. The DI container can be used to resolve and inject dependencies into controller actions, making it easier to write testable and maintainable code. Here's an example of how to use the DI container in Phalcon Micro:

$app->get('/hello', function () use ($app) {
    $logger = $app->getDI()->get('logger');
    $logger->info('Hello, world!');
});

In this example, the getDI() method retrieves the DI container, and the get() method resolves the logger dependency. The logger is then used to log a message.

4. Error Handling​

Phalcon Micro provides a built-in error handling mechanism that allows developers to handle exceptions and errors gracefully. It includes a default error handler, but developers can also define their custom error handlers to suit their application's needs. Here's an example of how to define a custom error handler in Phalcon Micro:

$app->error(function ($exception) {
    // Handle the exception and return an appropriate response
});

In this example, the error function defines a custom error handler that will be called whenever an exception occurs.

Examples​

Example 1: Hello World​

Here's a simple "Hello World" example using Phalcon Micro:

use Phalcon\Mvc\Micro;

$app = new Micro();

$app->get('/', function () {
    echo "Hello, World!";
});

$app->handle();

When you navigate to the root URL of your application, it will display the "Hello, World!" message.

Example 2: URL Parameters​

Phalcon Micro allows you to define routes with URL parameters. Here's an example:

$app->get('/hello/{name}', function ($name) {
    echo "Hello, " . $name . "!";
});

When you navigate to /hello/John, it will display "Hello, John!".

Example 3: Middleware​

Middleware can be used to perform actions before and after executing a controller action. Here's an example:

$app->before(function () {
    echo "Before action!";
});

$app->get('/hello', function () {
    echo "Hello, World!";
});

$app->after(function () {
    echo "After action!";
});

When you navigate to /hello, it will display "Before action!" followed by "Hello, World!" and then "After action!".

Conclusion​

Phalcon Micro is a lightweight PHP framework that offers powerful features to build web applications efficiently. With its routing, middleware, dependency injection, and error handling capabilities, developers can create robust and performant applications with ease. Check out the official Phalcon Micro website for more information and detailed documentation.