The Multi Select Field

The multi_select field is a basic field type. It's just a drop down select input where multiple options can be selected.

To creat a multi_select field option you need to create an array within the $sections => fields array. Like so:

<?php
array(
	'id' => '1', //must be unique
	'type' => 'multi_select', //the field type
	'title' => __('Multi Select Option', 'nhp-opts'),
	'sub_desc' => __('This is a little space under the Field Title in the Options table', 'nhp-opts'),
	'desc' => __('This is the description field, again good for additional info.', 'nhp-opts'),
    'options' => array('1' => __('Option 1', 'nhp-opts'), '2' => __('Option 2', 'nhp-opts')),// You must provide a set of key => value pairs
	'std' => array('1', '2')//this should be the key as defined above
	)
?>

With the above array we will be creating a radio field with the options:

id 1

title Multi Select Option

options Explained further down

These are the only required fields, the rest can be removed if not wanted. But it's always a good idea to explain the option using the sub_desc and desc fields.

We have also set the std attribute to an array of '1', '2' this will automatically select the options 1, and 2 from the select input.

You will also notice there is a Options section in the array. This is where you define the Option value and title of each select option. It needs to be provided as a key => value pair for each select option in the field type.