Field settings

Each field contains settings to determine where and how data is loaded and saved. All fields share some common settings, but also offer unique settings per field type. There are also settings from extensions which are explained on each extension docs.

Below is the list of common field settings with a brief description. The keys are for reference in code.

General

Name	Key	Description
Label	name	Field label. Optional. If empty, the field input is 100% width.
ID	id	Field ID. Required and must be unique. It will be used as meta_key when saving to the database. Use only numbers, letters, and underscores (and rarely dashes).
Type	type	Field type. Required.
Label description	label_description	Label description, displayed below the field label. Optional.
Input description	desc	Field description, displayed below the field input. Optional.
Default value	std	Default value. Optional.
Placeholder	placeholder	Placeholder text for the input or select box. Optional.
Required	required	Whether the field is required (true or false). Optional. Default false.
Disabled	disabled	Whether the field is disabled (true or false). Optional. Default false.
Read only	readonly	Whether the field is read only (true or false). Optional. Default false.
Multiple	multiple	Does the field have multiple values (like the select field)? Optional. Default false.
Cloneable	clone	Is the field clonable (repeatable)? true or false. Optional. Default false.
Sortable	sort_clone	Ability to drag-and-drop reorder clones (true or false). Optional. Default false.
Clone default value	clone_default	Clone the default value of fields? true or false (default).
Clone as multiple	clone_as_multiple	Whether to store clone values in multiple rows in the database? Optional. Default false.
Max number of clones	max_clone	Maximum number of clones. Optional. Default 0 (unlimited).
Min number of clones	min_clone	Minimum number of clones. Optional. Default 0.
Add more text	add_button	The text for Add more clone button. Optional. Default "+ Add more".
Hide from front end	hide_from_front	Whether to hide the field from front-end submission forms. Required the MB Frontend Submission extension to work.
Hide from REST API	hide_from_rest	Whether to hide the field from REST API responses. Required the MB REST API extension to work.

Advanced

Name	Key	Description
Before	before	Custom HTML outputted before field's HTML.
After	after	Custom HTML outputted after field's HTML.
Custom CSS class	class	Custom CSS class, in case you want to customize the field. Optional.
Custom sanitize callback	sanitize_callback	Custom PHP callback for sanitizing field value before saving into the database. Set it to none to bypass the sanitization. See more details.
Save field value	save_field	Whether to save field value. Optional. Default true. This option doesn't work in the block editor (Gutenberg).
Custom HTML5 attributes	attributes	Custom attributes for inputs. See more details.
Validation	validation	Validation rules for fields. Optional. See more details.
Custom settings	N/A	Custom field settings, useful when you want to add your settings to fields.