In Symfony 4.3 we added a Twig function called form_parent() which returns the parent form view or null if the form view already is the root form. Using this function should be preferred over accessing the parent form using form.parent . The latter way will produce different results for example when a child form is named parent .

Allow including HTML contents in help messages¶

The contents of the help message that can be defined for form fields are escaped by default to prevent security issues. If your help messages contain HTML elements (e.g. links to other pages) and you know they are safe to render "as is", set to true the new help_html option added in Symfony 4.3: