When setting the "empty_data" option of a text field to `""`, the submitted value is still converted to `null`. ``` php $form = $formFactory->createBuilder() ->add('task', 'text', array( 'required' => false, 'empty_data' => '', )) ->getForm(); if (isset($_POST[$form->getName()])) { $form->bind($_POST[$form->getName()]); var_dump($form->getData()); die; } ``` Actual result: ``` array (size=1) 'task' => null ``` Expected result: ``` array (size=1) 'task' => "" ```