yii\validators\FileValidator::buildMimeTypeRegexp PHP Method

Builds the RegExp from the $mask

See also: mimeTypes

private buildMimeTypeRegexp ( string $mask ) : string
$mask	string
return	string	the regular expression

    private function buildMimeTypeRegexp($mask)
    {
        return '/^' . str_replace('\\*', '.*', preg_quote($mask, '/')) . '$/';
    }

FileValidator