How can I register fields via php when a post is saved

• tobe

• September 27, 2015 at 11:36 pm

Hey,

my question seems to be very simple and I have many ideas how to solve it but maybe I understand something wrong. Please help me!

I want to register new fields via php in the admin area for lets say a post of type “test_type_1”. If I use the following code in the functions.php it works like a charm:

if( function_exists('acf_add_local_field_group') ):

acf_add_local_field_group(array(
	'key' => 'group_1',
	'title' => 'My Group',
	'fields' => array (
		array (
			'key' => 'field_1',
			'label' => 'Sub Title',
			'name' => 'sub_title',
			'type' => 'text',
		)
	),
	'location' => array (
		array (
			array (
				'param' => 'post_type',
				'operator' => '==',
				'value' => 'test_type_1',
			),
		),
	),
));

endif;

Okay! So what I am trying next is to change the group_label. Let’s say for testings I want to change it in a way that there is the current shown post_title appended or a linked acf-field title or something else.

Here is the point it doesn’t work anymore! I cant add new fields by code when I cange the parameters in the code above by getting other field values. Like this for example:

From:
'label' => 'Sub Title',

To:
'label' => get_queried_object()->post_title,

My target is to generate new fields via php in posts of the type “test_type_1”. These new fields shall represent all posts of “test_type_2” I linked this post to.

I hope you can give me some hints to solve this problem! 🙂

• John Huebner

• April 8, 2016 at 8:25 am

When you are registering the fields in when you call acf_add_local_field_group() you need to get the value that was previously saved.

if( function_exists('acf_add_local_field_group') ):

$label = 'Default Label';
// code to do something like get a new field label will go here
// what you need to do depends on where you're saving the
// value that you want to use

acf_add_local_field_group(array(
	'key' => 'group_1',
	'title' => 'My Group',
	'fields' => array (
		array (
			'key' => 'field_1',
			'label' => $label,
			'name' => 'sub_title',
			'type' => 'text',
		)
	),
	'location' => array (
		array (
			array (
				'param' => 'post_type',
				'operator' => '==',
				'value' => 'test_type_1',
			),
		),
	),
));

endif;