Learn Symfony - 1 Code Examples & CST Typing Practice Test

Symfony is a PHP web application framework and set of reusable components for building modern, scalable, and maintainable web applications and APIs.

View all 1 Symfony code examples →

Symfony Simple Counter App

Learn SYMFONY with Real Code Examples

Updated Nov 27, 2025

Introduction & Fundamentals Setup & Configuration Architecture & Deep Internals Performance & Security Development Workflow Learning & Career Growth Business & Strategy Examples

Code Sample Descriptions

Symfony Simple Counter App

<?php

// config/routes.yaml
counter_show:
    path: /counter
    controller: App\Controller\CounterController::show

counter_increment:
    path: /counter/increment
    controller: App\Controller\CounterController::increment

counter_decrement:
    path: /counter/decrement
    controller: App\Controller\CounterController::decrement

counter_reset:
    path: /counter/reset
    controller: App\Controller\CounterController::reset

// src/Controller/CounterController.php
namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class CounterController extends AbstractController {
    public function show(Request $request): Response {
        $count = $request->getSession()->get('count', 0);
        return $this->render('counter.html.twig', ['count' => $count]);
    }

    public function increment(Request $request): Response {
        $session = $request->getSession();
        $count = $session->get('count', 0) + 1;
        $session->set('count', $count);
        return $this->redirectToRoute('counter_show');
    }

    public function decrement(Request $request): Response {
        $session = $request->getSession();
        $count = $session->get('count', 0) - 1;
        $session->set('count', $count);
        return $this->redirectToRoute('counter_show');
    }

    public function reset(Request $request): Response {
        $request->getSession()->set('count', 0);
        return $this->redirectToRoute('counter_show');
    }
}

// templates/counter.html.twig
<!DOCTYPE html>
<html>
<head><title>Symfony Counter</title></head>
<body>
    <h2>Counter: {{ count }}</h2>
    <form action="/counter/increment" method="post"><button type='submit'>+</button></form>
    <form action="/counter/decrement" method="post"><button type='submit'>-</button></form>
    <form action="/counter/reset" method="post"><button type='submit'>Reset</button></form>
</body>
</html>

Demonstrates a simple Symfony controller and routes for a counter using session for state persistence.

Let’s Try →

Frequently Asked Questions about Symfony

What is Symfony?

Symfony is a PHP web application framework and set of reusable components for building modern, scalable, and maintainable web applications and APIs.

What are the primary use cases for Symfony?

Enterprise web applications. RESTful APIs and microservices. E-commerce platforms. Content management systems. Custom web platform development

What are the strengths of Symfony?

High flexibility and modularity. Strong community and ecosystem. Enterprise-ready and long-term support versions. Testable and maintainable codebase. Integrates easily with other PHP libraries

What are the limitations of Symfony?

Steep learning curve for beginners. Configuration-heavy for small projects. Can feel heavy for lightweight apps. Performance tuning may be required for very large apps. Some bundles may have version compatibility issues

How can I practice Symfony typing speed?

CodeSpeedTest offers 1+ real Symfony code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Other Programming Languages

C React Python C++Rust TypeScript Kotlin PHP Java C#Ruby Mql Cql N1ql Cypher Gremlin Partiql Haskell Elixir Fsharp View all languages →

Code Sample Descriptions

Symfony Simple Counter App

<?php

// config/routes.yaml
counter_show:
    path: /counter
    controller: App\Controller\CounterController::show

counter_increment:
    path: /counter/increment
    controller: App\Controller\CounterController::increment

counter_decrement:
    path: /counter/decrement
    controller: App\Controller\CounterController::decrement

counter_reset:
    path: /counter/reset
    controller: App\Controller\CounterController::reset

// src/Controller/CounterController.php
namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class CounterController extends AbstractController {
    public function show(Request $request): Response {
        $count = $request->getSession()->get('count', 0);
        return $this->render('counter.html.twig', ['count' => $count]);
    }

    public function increment(Request $request): Response {
        $session = $request->getSession();
        $count = $session->get('count', 0) + 1;
        $session->set('count', $count);
        return $this->redirectToRoute('counter_show');
    }

    public function decrement(Request $request): Response {
        $session = $request->getSession();
        $count = $session->get('count', 0) - 1;
        $session->set('count', $count);
        return $this->redirectToRoute('counter_show');
    }

    public function reset(Request $request): Response {
        $request->getSession()->set('count', 0);
        return $this->redirectToRoute('counter_show');
    }
}

// templates/counter.html.twig
<!DOCTYPE html>
<html>
<head><title>Symfony Counter</title></head>
<body>
    <h2>Counter: {{ count }}</h2>
    <form action="/counter/increment" method="post"><button type='submit'>+</button></form>
    <form action="/counter/decrement" method="post"><button type='submit'>-</button></form>
    <form action="/counter/reset" method="post"><button type='submit'>Reset</button></form>
</body>
</html>

Demonstrates a simple Symfony controller and routes for a counter using session for state persistence.

Let’s Try →

Frequently Asked Questions about Symfony

What is Symfony?

Symfony is a PHP web application framework and set of reusable components for building modern, scalable, and maintainable web applications and APIs.

What are the primary use cases for Symfony?

Enterprise web applications. RESTful APIs and microservices. E-commerce platforms. Content management systems. Custom web platform development

What are the strengths of Symfony?

High flexibility and modularity. Strong community and ecosystem. Enterprise-ready and long-term support versions. Testable and maintainable codebase. Integrates easily with other PHP libraries

What are the limitations of Symfony?

How can I practice Symfony typing speed?

CodeSpeedTest offers 1+ real Symfony code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.