New in Symfony 5.1: Misc. improvements (Part 2)
Warning: This post is about an unsupported Symfony version. Some of this information may be out of date. Read the most recent Symfony Docs.
Symfony includes a linter that checks the validity of the syntax of your YAML
config files. It's available under the
lint:yaml command, but requires
using the entire Symfony project console application.
In Symfony 5.1 we added a single-command application called
you can lint YAML files using only the Yaml and Console components:
$ php vendor/bin/yaml-lint translations/
If your application doesn't use the Messenger component to send emails and sends just one message, the RoundRobin transport doesn't work as expected, because its first transport is always used. In Symfony 5.1 we improved it to select the first transport randomly.
Deprecation messages are the key of the Symfony Backward Compatibility Promise, which ensures a smooth upgrade between minor Symfony versions. However, sometimes it's overwhelming to see lots of deprecations in your log files. In other projects, you may want to focus exclusively on deprecations, so the other log messages only complicate things.
That's why in Symfony 5.1 we've added some optional configuration in the
config/packages/prod/monolog.yaml file to log the deprecations in a separate
file. The new config is commented by default, so you need to enable it
explicitly if you want to use it.
Some mailing services allow to define tags/metadata in your messages to add any data that may be useful for your application. In Symfony 5.1 we added support for them in mailers such as Postmark and Mailgun:
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use Symfony\Component\Mailer\Header\MetadataHeader; use Symfony\Component\Mailer\Header\TagHeader; $email->getHeaders()->add(new TagHeader('password-reset')); $email->getHeaders()->add(new MetadataHeader('Color', 'blue')); $email->getHeaders()->add(new MetadataHeader('Client-ID', '12345'));
In mailers that support these features, you'll see the data in the custom headers or payload of the messages. In the rest of mailers, you'll see them as custom headers:
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X-Tag: password-reset X-Metadata-Color: blue X-Metadata-Client-ID: 12345
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