file_validate
function file_validate
file_validate(FileInterface $file, $validators = array())
Checks that a file meets the criteria specified by the validators.
After executing the validator callbacks specified hook_file_validate() will also be called to allow other modules to report errors about the file.
Parameters
\Drupal\file\FileInterface $file: A file entity.
array $validators: (optional) An associative array of callback functions used to validate the file. T