File
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File
Validates that a value is a valid "file", which can be one of the following:
- A string (or object with a
__toString()method) path to an existing file; - A valid File object (including objects of class UploadedFile).
This constraint is commonly used in forms with the file form type.
Tip
If the file you're validating is an image, try the Image constraint.
| Applies to | property or method |
| Options | |
| Class | File |
| Validator | FileValidator |
Basic Usage
This constraint is most commonly used on a property that will be rendered
in a form as a file form type. For example,
suppose you're creating an author form where you can upload a "bio" PDF for
the author. In your form, the bioFile property would be a file type.
The Author class might look as follows:
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// src/Acme/BlogBundle/Entity/Author.php
namespace Acme\BlogBundle\Entity;
use Symfony\Component\HttpFoundation\File\File;
class Author
{
protected $bioFile;
public function setBioFile(File $file = null)
{
$this->bioFile = $file;
}
public function getBioFile()
{
return $this->bioFile;
}
}To guarantee that the bioFile File object is valid, and that it is
below a certain file size and a valid PDF, add the following:
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# src/Acme/BlogBundle/Resources/config/validation.yml
Acme\BlogBundle\Entity\Author:
properties:
bioFile:
- File:
maxSize: 1024k
mimeTypes: [application/pdf, application/x-pdf]
mimeTypesMessage: Please upload a valid PDFThe bioFile property is validated to guarantee that it is a real file.
Its size and mime type are also validated because the appropriate options
have been specified.
Options
maxSize
type: mixed
If set, the size of the underlying file must be below this file size in order to be valid. The size of the file can be given in one of the following formats:
- bytes: To specify the
maxSizein bytes, pass a value that is entirely numeric (e.g.4096); - kilobytes: To specify the
maxSizein kilobytes, pass a number and suffix it with a lowercase "k" (e.g.200k); - megabytes: To specify the
maxSizein megabytes, pass a number and suffix it with a capital "M" (e.g.4M).
mimeTypes
type: array or string
If set, the validator will check that the mime type of the underlying file is equal to the given mime type (if a string) or exists in the collection of given mime types (if an array).
You can find a list of existing mime types on the IANA website
maxSizeMessage
type: string default: The file is too large ({{ size }}). Allowed maximum size is {{ limit }}
The message displayed if the file is larger than the maxSize option.
mimeTypesMessage
type: string default: The mime type of the file is invalid ({{ type }}). Allowed mime types are {{ types }}
The message displayed if the mime type of the file is not a valid mime type per the mimeTypes option.
notFoundMessage
type: string default: The file could not be found
The message displayed if no file can be found at the given path. This error
is only likely if the underlying value is a string path, as a File object
cannot be constructed with an invalid file path.
notReadableMessage
type: string default: The file is not readable
The message displayed if the file exists, but the PHP is_readable function
fails when passed the path to the file.
uploadIniSizeErrorMessage
type: string default: The file is too large. Allowed maximum size is {{ limit }}
The message that is displayed if the uploaded file is larger than the upload_max_filesize
PHP.ini setting.
uploadFormSizeErrorMessage
type: string default: The file is too large
The message that is displayed if the uploaded file is larger than allowed by the HTML file input field.
uploadErrorMessage
type: string default: The file could not be uploaded
The message that is displayed if the uploaded file could not be uploaded for some unknown reason, such as the file upload failed or it couldn't be written to disk.
