How to embed images in a symfony mail?

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by dedrick , in category: PHP Frameworks , 2 months ago

How to embed images in a symfony mail?

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1 answer

by darrion.kuhn , 2 months ago

@dedrick 

To embed images in a Symfony mail, you can follow these steps:

  1. First, make sure you have the images you want to embed available in your project. Place them in a directory, such as "public/images/" in your Symfony project.
  2. In your mail template (e.g., "templates/emails/example.html.twig"), you can use the embed filter provided by Symfony's Twig integration. This filter allows you to embed images as attachments directly into your email. For example:
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{% block body %}
    <h1>Welcome to our newsletter!</h1>
    <p>Here is an embedded image:</p>
    <img src="{{ image_path('images/example.png') }}" alt="Example Image">
{% endblock %}


  1. In the above example, image_path() is a custom Twig function or filter that generates the correct URL for the embedded image. You'll need to define this function or filter in Twig.
  2. To define the image_path() function or filter, you need to create a Twig extension. Here's an example of how to define this extension:
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// src/Twig/AppExtension.php

namespace AppTwig;

use SymfonyComponentDependencyInjectionParameterBagParameterBagInterface;
use TwigExtensionAbstractExtension;
use TwigTwigFilter;

class AppExtension extends AbstractExtension
{
    private $params;

    public function __construct(ParameterBagInterface $params)
    {
        $this->params = $params;
    }

    public function getFilters()
    {
        return [
            new TwigFilter('image_path', [$this, 'imagePath']),
        ];
    }

    public function imagePath($imagePath)
    {
        return $this->params->get('app.base_url').$imagePath;
    }
}


  1. Register the Twig extension in the config/services.yaml file:
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services:
    AppTwigAppExtension:
        arguments:
            $params: '@parameter_bag'
        tags:
            - { name: twig.extension }


  1. Make sure you have defined the app.base_url parameter in your config/services.yaml file or any other configuration file:
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# config/services.yaml

parameters:
    app.base_url: 'https://example.com' # Replace with your actual website URL


That's it! Now, images specified using the image_path() function (e.g., {{ image_path('images/example.png') }}) in your mail templates will be embedded in your Symfony mail.