Custom Meta Boxes

Fieldify makes it easy to register custom meta boxes in the block editor using only PHP. Custom meta boxes can be registered using the register_custom_meta_box function. The function takes two arguments: the meta box name and an array of meta box settings.

register_custom_meta_box( 'custom-meta-box-name', [] );

Meta box registration matches WordPress core meta box registration with the addition of a ‘fields’ argument.

Below is an example of how to register a custom meta box with some custom fields:

register_custom_meta_box( 'my-meta-box', [
  'title'      => 'My Meta Box',
  'post_types' => [ 'post' ],
  'context'    => 'side',
  'priority'   => 'default',
  'fields'     => [
    'hideContentSetting' => [
      'default' => false,
      'control' => 'toggle',
    ],
    'content' => [
      'label'   => 'Content',
      'control' => 'text',
      'default' => 'My meta box content',
      'show_if' => [
        [
          'field'    => 'hideContentSetting',
          'operator' => '!==',
          'value'    => true,
        ],
      ],
    ],
  ],
] );

Fields

Meta box fields are defined as an associative array with the field name as the key and an array of options as the value.