function UploadedFile::guessClientExtension

Returns the extension based on the client mime type.

If the mime type is unknown, returns null.

This method uses the mime type as guessed by getClientMimeType() to guess the file extension. As such, the extension returned by this method cannot be trusted.

For a trusted extension, use guessExtension() instead (which guesses the extension based on the guessed mime type for the file).

See also

guessExtension()

getClientMimeType()

File

vendor/symfony/http-foundation/File/UploadedFile.php, line 146

Class

UploadedFile

A file uploaded through a form.

Namespace

Symfony\Component\HttpFoundation\File

Code

public function guessClientExtension() : ?string {
    if (!class_exists(MimeTypes::class)) {
        throw new \LogicException('You cannot guess the extension as the Mime component is not installed. Try running "composer require symfony/mime".');
    }
    return MimeTypes::getDefault()->getExtensions($this->getClientMimeType())[0] ?? null;
}