Doing Metaboxes in WordPress the easy way

Adding Metaboxes in WordPress to your admin areas normally involves 3 steps:

1. Action to define the metabox area
2. Callback to define the metabox content
3. Action to handle the metabox updates / saves

This can be done much easier using Custom Metaboxes and Fields for WordPress, which is a metabox, custom fields and forms library. The library provides a bunch of custom fields and also allows you to add your own easily. Much easier to build new Metaboxes fast!

List of field types included:

1. title An arbitrary title field *
2. text
3. text_small
4. text_medium
5. text_email
6. text_url
7. text_money
8. textarea
9. textarea_small
10. textarea_code
11. text_date Date Picker
12. text_time Time picker
13. select_timezone Time zone dropdown
14. text_date_timestamp Date Picker (UNIX timestamp)
15. text_datetime_timestamp Text Date/Time Picker Combo (UNIX timestamp)
16. text_datetime_timestamp_timezone Text Date/Time Picker/Time zone Combo (serialized DateTime object)
17. colorpicker Color picker
18. radio *
19. radio_inline *
20. taxonomy_radio *
21. taxonomy_radio_inline *
22. select
23. taxonomy_select *
24. checkbox *
25. multicheck
26. taxonomy_multicheck *
27. taxonomy_multicheck_inline
28. wysiwyg (TinyMCE) *
29. file Image/File upload *†
30. file_list Image/File list upload
31. oembed Converts oembed urls (instagram, twitter, youtube, etc. oEmbed in the Codex)
32. group Hybrid field that supports adding other fields as a repeatable group. *

Simple example from the CMB2 Github page

if ( file_exists(  __DIR__ . '/cmb2/init.php' ) ) {

  require_once  __DIR__ . '/cmb2/init.php';


} elseif ( file_exists(  __DIR__ . '/CMB2/init.php' ) ) {

  require_once  __DIR__ . '/CMB2/init.php';

}
 
add_action( 'cmb2_init', 'cmb2_sample_metaboxes' );

/**
 * Define the metabox and field configurations.
 */

function cmb2_sample_metaboxes() {

 
    // Start with an underscore to hide fields from custom fields list

    $prefix = '_yourprefix_';

 
    /**

     * Initiate the metabox
     */
    $cmb = new_cmb2_box( array(

        'id'            => 'test_metabox',

        'title'         => __( 'Test Metabox', 'cmb2' ),

        'object_types'  => array( 'page', ), // Post type

        'context'       => 'normal',

        'priority'      => 'high',

        'show_names'    => true, // Show field names on the left

        // 'cmb_styles' => false, // false to disable the CMB stylesheet

        // 'closed'     => true, // Keep the metabox closed by default

    ) );

 
    // Regular text field

    $cmb->add_field( array(

        'name'       => __( 'Test Text', 'cmb2' ),

        'desc'       => __( 'field description (optional)', 'cmb2' ),

        'id'         => $prefix . 'text',

        'type'       => 'text',

        'show_on_cb' => 'cmb2_hide_if_no_cats', // function should return a bool value

        // 'sanitization_cb' => 'my_custom_sanitization', // custom sanitization callback parameter

        // 'escape_cb'       => 'my_custom_escaping',  // custom escaping callback parameter

        // 'on_front'        => false, // Optionally designate a field to wp-admin only

        // 'repeatable'      => true,

    ) );

 
}