I needed to pass a variable dynamically to set the default for a field in a front-end form. I ended up using a PHP Closure in the add_filter call. I realize that you could use a class/object but this seems cleaner.
Here is more info for those that are interested: PHP Closures, hooks, and WordPress
Do you think this would be helpful to add to the documentation? I know that you have the post on setting the default values for selects, but this would allow people to dynamically set the default value for any field dynamically.
$member_id = $view->member_id; // variable in script to be passed coming from object (could be any variable.)
add_filter('acf/load_field/name=visit_name',
function($field) use ($member_id) {
// the variable after 'use' ($member_id) indicates that it is the one to 'use' from the main script. $field is coming from 'acf/load_field'.
$field['default_value'] = $member_id;
return $field;
}
);
Thanks,
Andy
Hi @CommandZ
Thanks for sharing your code, but I think this is a bit advanced to make it onto the ACF docs. It may confuse many new comers to WP which find the basics a handful.
Thanks
E
You’re right Elliot. ACF is an abstraction layer, an easy and fast one at that :), and most will not need to do the above. Thanks for putting this together. Can’t wait to see your paid version!
That was a great help @commandz.
Thanks for sharing!
@commandz – Any chance you’re still checking this? (Or anyone else who understands it?) I am trying to do this very thing, but I need to populate the default value with the value of another ACF field from a specific page.
Here’s how I tried to implement it in functions.php, but it’s not working:
$address = get_field('center_address', 342);
add_filter('acf/load_field/name=contact_info',
function($field) use ($address) {
$field['default_value'] = $address;
return $field;
}
);
I’m trying to populate the value of field “contact_info” with the value from “center_address”, from post 342. I’m trying to do this on a backend form on the post editing screen, not a frontend form.
I’m using ACF Pro. The center_address and contact_person field are text fields.
THANK YOU!
Nevermind. I answered my own question. I needed to get rid of “use” and format it like so:
function my_acf_load_field( $field ) {
$address = get_field('center_address', 342);
$field['default_value'] = $address;
return $field;
}
add_filter('acf/load_field/name=contact_person', 'my_acf_load_field');
THANK YOU!
Exactly what I needed, fantastic!
Also, if you want to make that field be uneditable/disabled add this (before the return):
$field['disabled'] = 1;
This is great, thanks for sharing.
If there is no field, such as not logged in so can’t get first name, at the moment it displays 0 in the input, how can I set this to be empty/blank if no field?
