Ho would I pre populate a checkbox with "checked" or "unchecked" depending on a variable I pass to the function?
so far I have:
function populate_checkbox() {
if(meets criteria) {
check the box (what goes here???)
} else {
don't check the box
}
add_filter("gform_field_value_checkbox", "populate_checkbox");Your filter function needs to return a comma separated list of all choices that you want to be checked. If you want a choice to remain unchecked, simply don't include it in the list.
In my example below, the items "First" and "Second" will be checked, while all other choices I have in that field will remain unchecked.
function populate_checkbox(){
return "First,Second";
}
add_filter("gform_field_value_checkbox", "populate_checkbox");I am not sure I follow. If you mean access each checkbox choice inside a field, you don't need to do it. Just return the choice text as one of the items in the comma separated list and that specific checkbox will be checked.
If you are asking how to access each checkbox field, you do that by the parameter name. When you turn on the option in the form settings to "Allow field to be populated dynamically", you give it a parameter name. That name is used in the hook.
add_filter("gform_field_value_$parameter_name", "populate_checkbox");In your example above, the parameter name was "checkbox", so we used "gform_field_value_checkbox" for the filter name:
add_filter("gform_field_value_checkbox", "populate_checkbox");