class FormTypeCsrfExtension extends

class FormEvents To learn more about how form events work check the documentation entry at {@link

FormInterface getRoot()

bool hasOption(string $name) Returns whether a specific option exists.

bool valid() Returns whether the iterator's position is valid.

FormConfigBuilderInterface

FormConfigBuilderInterface

FormConfigBuilderInterface

offsetUnset($position) Unsupported method.

mixed getContentLength() Returns the content length of the request.