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Contributed by
Kévin Dunglas
in #47710.
The File constraint from the Validator element checks {that a} given worth
is a sound file. One in every of its choices is known as mimeTypes and it verifies that
the media kind (previously often known as MIME kind) of the file is among the given values:
The values handed to mimeTypes have to be any of the official checklist of legitimate media varieties.
A few of these values are complicated and cumbersome even for frequent file varieties
(e.g. Microsoft Excel have a number of media varieties related to it, akin to
utility/vnd.ms-excel, utility/vnd.ms-excel.sheet.macroEnabled.12, and many others.)
In Symfony 6.2 we’re enhancing the File constraint with a brand new possibility known as
extensions. This feature checks each the file extension and its media kind.
Utilizing this feature, the above instance appears as follows:
The extensions possibility checks each that the file has precisely the .pdf
extension and that its media kind is any of the categories related to that extension
within the official checklist (utility/pdf, utility/x-pdf, and many others.)
Within the following instance, we enable importing any file related to JPEG media
varieties, however require that the extension is .jpg (so, .jpeg information will not be
allowed):
The extensions possibility additionally permits to go a listing of media varieties to simply accept
for the extension. Furthermore, you’ll be able to go an array to simply accept a number of extensions,
every of them optionally defining which media varieties to simply accept:
