need help on how to use gform_save_field_value()

Hi,

Rather late here and my brain is stuck. Basically I'm trying to understand how to use the gform_save_field_value() and gform_get_input_value() filters to
a) encode/encrypt an entire form or
b) just a particular field in a form.

In the docs - what is 10, 4? I thought it was in relation to the field and form ids?

<?php

add_filter("gform_save_field_value", "save_field_value", 10, 4);

function save_field_value($value, $lead, $field, $form){

return base64_encode($value);

}

add_filter("gform_get_input_value", "decode_field", 10, 4);

function decrypt_field($value, $lead, $field, $input_id){

return base64_decode($value);

}

My form is at http://tinyurl.com/bvrcqh5

My form ID is 2, and the 'Telephone' field is field ID 4.

Thanks
ax10

Hi Chris,
Ok head is clearer this morning, I understand the '10,4' args in add_filter() now thanks.

Also I'd blindly copied the code in the docs for gform_get_input_value example and there is an error in that the add_filter() is referencing a function called 'decode_field' but in sample code its called 'decrypt_field'... which gave me odd results. http://www.gravityhelp.com/documentation/page/Gform_get_input_value

Ok with that out of the way; I presume that if I just (as per sample code)

return base64_encode($value)

and

return base64_decode($value)

in their respective functions every GF form and every field will get encoded/decoded right?

Q1. Is this safe to use as is for advanced fields (name, address) and checkboxs/radio buttons? Do these need to be treated any differently?

Q2. Any sample code on how to say just target a particular field within a specific form?

Q3. Ideally I'd like to use some encryption code rather than base64 encoding - any suggestions?

Many thanks