Overview

The checkbox list field creates a list of tick-able checkboxes. You are able to select multiple choices from the predefined list.

Screenshots

Default:

With “Select All / None” button:

Inline:

Settings

Besides the common settings, this field has the following specific settings:

Note that the multiple setting is always set to true for this field.

Sample code

array(
    'name'    => 'Checkbox list',
    'id'      => 'field_id',
    'type'    => 'checkbox_list',
    // Options of checkboxes, in format 'value' => 'Label'
    'options' => array(
        'java'       => 'Java',
        'javascript' => 'JavaScript',
        'php'        => 'PHP',
        'csharp'     => 'C#',
        'objectivec' => 'Objective-C',
        'kotlin'     => 'Kotlin',
        'swift'      => 'Swift',
    ),
    // Display options in a single row?
    // 'inline' => true,
    // Display "Select All / None" button?
    'select_all_none' => true,
),

Data

This field saves multiple values in the database. Each value is store in a single row in the database with the same meta key (similar to what add_post_meta does with last parameter false).

If the field is cloneable, then the value is stored as a serialized array in a single row in the database.

Template usage

If field is not cloneable:

$values = rwmb_meta( $field_id );
foreach ( $values as $value ) {
    echo $value;
}

If field is cloneable:

$values = rwmb_meta( $field_id );
foreach ( $values as $clone ) {
    foreach ( $clone as $value ) {
        echo $value;
    }
}

The function rwmb_meta() only returns the value of the field, e.g. the key in the options array. To display the field label, use this code:

rwmb_the_value( $field_id );

which outputs:

<ul>
    <li>Java</li>
    <li>JavaScript</li>
</ul>

Read more about rwmb_meta() and rwmb_the_value().