New in Symfony 7.4 Misc Features (Part 3)

Structured MIME Suffix Support

Contributed by Florent Morselli in #61267

Although common MIME types are simple (text/css, application/javascript), sometimes you have to deal with more complex MIME types that include subtypes. These are defined in RFC 2045 and look like application/hal+xml or application/device-config+tlv.

In Symfony 7.4, we improved the getFormat() method of the Request class so you get more accurate formats when providing a complex MIME type with subtypes. This feature is available through a new boolean parameter (false by default to keep backward compatibility). Set it to true to try to extract the format from the subtype when no match is found using the full MIME type:

1
2

$request->getFormat('application/device-config+tlv', true);
// returns 'tlv'

MicrosoftGraph Mailer Integration

Contributed by Bob van de Vijver in #61290

Symfony provides built-in integration with 18 mailer services such as Azure, Amazon SES, Mailgun, and Mandrill. In Symfony 7.4, we are adding a new integration with the Microsoft Graph API Email endpoint.

Untranslated Messages

Contributed by Vincent Langlet in #60935

In many Symfony applications, it is common to have code like this:

1
2
3
4
5

if ($message instanceof Translatable) {
    $message->trans($translator);
} else {
    $translator->trans($message, domain: 'SomeBundle');
}

This means that Translatable objects are always translated, as they usually should be. However, sometimes you might have special messages that should remain invariant or have already been translated outside Symfony. In those cases, you can use the new StaticMessage class, which implements TranslatableInterface but does not perform any translation:

1
2
3
4
5
6
7
8
9

$message = new TranslatableMessage('Symfony is great');
$message->trans($translator, 'es');
// 'Symfony es genial'

use Symfony\Component\Translation\StaticMessage;

$message = new StaticMessage('Symfony is great');
$message->trans($translator, 'es');
// 'Symfony is great'

New Email Assert

Contributed by Santiago San Martin in #60740

Symfony provides tens of custom PHPUnit assertions such as assertResponseHasHeader() and assertPageTitleContains() to simplify common tests in Symfony web applications.

In Symfony 7.4, we added a new assertion called assertEmailAddressNotContains(), which complements the existing assertEmailAddressContains(). It checks that the given email address is not included in a specific header of an email message:

1

$this->assertEmailAddressNotContains($email, 'To', 'test@test.com');

Profiling EventSource Requests

Contributed by Valtteri R in #61311

The Symfony profiler is an essential tool that lets you inspect and debug any aspect of the current request(s). In Symfony 7.4, we improved the Ajax panel so it not only captures and profiles Ajax requests but also requests triggered by JavaScript's EventSource (Server-Sent Events).

You will now see these requests as event-stream entries in the web debug toolbar:

This is the last blog post in the New in Symfony 7.4 series. We hope you enjoyed reading it and that you upgrade your Symfony applications soon. Meanwhile, work on Symfony 8.1 has already begun in preparation for its release in May 2026.