/**
* Checks if given uploaded file have correct type (extension) according current validator settings.
* @param UploadedFile $file
* @return boolean
*/
protected function validateExtension($file)
{
$extension = mb_strtolower($file->extension, 'utf-8');
if ($this->checkExtensionByMimeType) {
$mimeType = FileHelper::getMimeType($file->tempName, null, false);
if ($mimeType === null) {
return false;
}
$extensionsByMimeType = FileHelper::getExtensionsByMimeType($mimeType);
if (!in_array($extension, $extensionsByMimeType, true)) {
return false;
}
}
if (!in_array($extension, $this->extensions, true)) {
return false;
}
return true;
}
