Strict Mode for Missing Assets

        Contributed by Jérôme Tamarelle 
        in #38495.

In Symfony applications you can use a JSON file manifest as the strategy to manage asset versions. When a requested asset is not listed in manifest.json, Symfony returns the unmodified path of the asset. This prevents the application from breaking when some asset is missing but generates 404 errors in the browser when trying to load the asset. In Symfony 5.4 we've added a strict_mode option (which is disabled by default). When it's true, the application triggers an exception for missing assets, so you can solve the issue. That's why it's recommended to use '%kernel.debug%' as its value, so the application breaks in dev/test but keeps working in production:

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config/packages/assets.yaml

framework: assets: packages: app: strict_mode: '%kernel.debug%'

Copy File Paths in Error Pages

        Contributed by Lorenzo Millucci 
        in #40052.

The file paths of error traces in exception pages are clickable. If you configure the framework.ide option properly, you can open those files directly on PhpStorm, VS Code, SublimeText, etc. In Symfony 5.4 we've improved this page a bit more so you can copy those file paths to clipboard. You only need to move your mouse over some row and you'll see a new clipboard icon to click on it:

Allow to Exclude Directories from Yaml Linting

        Contributed by Christin Gruber 
        in #39641.

The lint:yaml command is a nice little tool used for example to find errors in translation files. However, sometimes you might have YAML files which use a custom syntax extensions or advanced features not supported by the YAML linter. In those cases, use the new --exclude option to not lint the files included in the given directories:

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2 3 4 $ php bin/console lint:yaml translations/ --exclude=translations/experimental/

you can exclude multiple directories

$ php bin/console lint:yaml translations/ --exclude=translations/draft/ --exclude=translations/discarded/

New Nil ULID Class

        Contributed by Thomas Calvet 
        in #41802.

The Uid component provides utilities to work with UUIDs and ULIDs. The UUID standard defines a NilUuid object to represent null UUID values and Symfony component implements it. However, even if the ULID standard doesn't define a NilUlid object, in Symfony 5.4 we've decided to add it so you can easily create and check for null ULID values:

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BEFORE

use Symfony\Component\Uid\Ulid;

$nilUlid = new Ulid('00000000000000000000000000');

AFTER

use Symfony\Component\Uid\NilUlid;

$nilUlid = new NilUlid();

New String Functions

        Contributed by Nicolas Grekas 
        in #43481.

The String component provides an object-oriented API for strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way. In Symfony 5.4 we've added two new functions to it:

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2 3 4 5 6 7 8 9 10 // removes the given content from the start/end of the string u('file-image-0001.png')->trimPrefix('file-'); // 'image-0001.png' u('file-image-0001.png')->trimPrefix('image-'); // 'file-image-0001.png'

u('template.html.twig')->trimSuffix('.html'); // 'template.html.twig' u('template.html.twig')->trimSuffix('.twig'); // 'template.html'

// when passing an array of prefix/sufix, only the first one found is trimmed u('file-image-0001.png')->trimPrefix(['file-', 'image-']); // 'image-0001.png' u('template.html.twig')->trimSuffix(['.twig', '.html']); // 'template.html'

                Sponsor the Symfony project.

https://symfony.com/blog/new-in-symfony-5-4-misc-features-part-1?utm_source=Symfony%20Blog%20Feed&utm_medium=feed