validator

gistfile1.txt

$inputFilter->add($factory->createInput(array(
            'name' => 'cenLat',
            'required' => true,
            'validators' => array(
                array(
                    'name' => 'NotEmpty',                                
                    'options' => array(
                        'messages' => 'YOUR CUSTOM ERROR MESSAGE',
                        'type' => array('integer', 'float'),
                    )
                )
            )
)));