WP Detail Fields registration examples

examples.php

<?php
/**
 *  WP Detail Field: Registration Examples
 */
 
function register_my_custom_detail_fields () {
  
  /**
   *  Field Types: text, textarea, date, time, email, url
   *  
   *  Field registration for these fields is similar, just change the type in the config array
   */
  register_detail_field( 'post', array(
    'type'        => 'text',
    'slug'        => 'my-text-field',
    'caption'     => __('My Text Field', 'textdomain'),
    'description' => __('This is my text field', 'textdomain')  // description can be used with any field type
  )  );

  /**
   *  Field Type: select (single)
   */
  register_detail_field( 'post', array(
    'type'          => 'select',
    'slug'          => 'my-select',
    'caption'       => __('My Select', 'textdomain'),
    'options'       => array(
      'opt-1'         => __('Option 1', 'textdomain'),
      'opt-2'         => __('Option 2', 'textdomain')
    ),
    'default-val'   => 'opt-1'    // default-val has to correspond with one key in the options-array
    'caption-none'  => __('--None--', 'textdomain')   // none-option only appears when no default-val is set
  ) );

  /**
   *  Field Type: post-select
   * 
   *  post-select automatically loads a list of posts according to config array into the select field
   */
  register_detail_field( 'post', array(
    'type'      => 'post-select',
    'slug'      => 'linked-page',
    'caption'   => __('Linked Page', 'textdomain'),
    'post-args' => array(       // post-args are directly passed to get_posts(). Read the WP doc to get more info
      'post_type'   => 'page',
      'orderby'     => 'menu_order',
      'order'       => 'ASC'
    )
  ) );
  
  /**
   *  Field Types: checkbox (multi), radio (multi)
   * 
   *  default-val doesn't work for checkbox
   */
  register_detail_field( 'post', array(
    'type'    => 'radio',     // or 'checkbox'
    'slug'    => 'my-radio',
    'caption' => __('My Radio', 'textdomain'),
    'options' => array(
      'opt-1'   => __('Option 1', 'textdomain'),
      'opt-2'   => __('Option 2', 'textdomain')
    ),
    'default-val'   => 'opt-1'  // doesn't work for checkbox
  ) );
  
}

add_action( 'register_my_custom_detail_fields', 'add_detail_fields' );
?>