Symfony Flash Message - PHP

Flash messages are small notification messages that appear temporarily on the user's screen to inform them about a particular event or action.

Symfony provides a built-in flash message system that allows developers to easily create and display flash messages in their PHP applications.

How to use Symfony Flash Message

To use Symfony flash messages in your PHP application, follow these steps:

1. Include the Symfony Flash Message component in your project via Composer:

{
    "require": {
        "symfony/flash-message": ">=5.0"
    }
}

2. To add a flash message, use the addFlash() method in your controller:

public function helloAction()
{
    // ...

    $this->addFlash('success', 'Hello world!');

    // ...
}

The first argument to addFlash() is the type of the flash message (e.g. success, warning, error, etc.), and the second argument is the message body.

3. To display the flash message in your template, use the app.flashes() method:

{% for type, messages in app.flashes() %}
  {% for message in messages %}
    <div class="{{ type }}">{{ message }}</div>
  {% endfor %}
{% endfor %}

This code will iterate through each type of flash message (success, warning, error, etc.) and display all messages for that type.

Conclusion

Symfony's flash message component provides an easy and convenient way to create and display temporary notification messages in your PHP applications. By using this component, you can improve the user experience of your application by providing clear and concise feedback to the user.