have the gravity forms a method of make a custom number fields for specifics
documents and phones like ###.###.###-##???
have the gravity forms a method of make a custom number fields for specifics
documents and phones like ###.###.###-##???
You can use the gform_validation hook to write your own custom validation. This allows you to do any kind of validation you want by writing your own custom code. Here is a tutorial on the gform_validation hook:
http://www.gravityhelp.com/documentation/page/Using_the_Gravity_Forms_%22gform_valiation%22_Hook