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Editing: example-functions.php

<?php
/**
 * Include and setup custom metaboxes and fields. (make sure you copy this file to outside the CMB2 directory)
 *
 * Be sure to replace all instances of 'yourprefix_' with your project's prefix.
 * http://nacin.com/2010/05/11/in-wordpress-prefix-everything/
 *
 * @category YourThemeOrPlugin
 * @package Demo_CMB2
 * @license http://www.opensource.org/licenses/gpl-license.php GPL v2.0 (or later)
 * @link https://github.com/CMB2/CMB2
 */

/**
 * Get the bootstrap! If using the plugin from wordpress.org, REMOVE THIS!
 */

if ( file_exists( dirname( __FILE__ ) . '/cmb2/init.php' ) ) {
	require_once dirname( __FILE__ ) . '/cmb2/init.php';
} elseif ( file_exists( dirname( __FILE__ ) . '/CMB2/init.php' ) ) {
	require_once dirname( __FILE__ ) . '/CMB2/init.php';
}

/**
 * Conditionally displays a metabox when used as a callback in the 'show_on_cb' cmb2_box parameter
 *
 * @param  CMB2 $cmb CMB2 object.
 *
 * @return bool      True if metabox should show
 */
function yourprefix_show_if_front_page( $cmb ) {
	// Don't show this metabox if it's not the front page template.
	if ( get_option( 'page_on_front' ) !== $cmb->object_id ) {
		return false;
	}
	return true;
}

/**
 * Conditionally displays a field when used as a callback in the 'show_on_cb' field parameter
 *
 * @param  CMB2_Field $field Field object.
 *
 * @return bool              True if metabox should show
 */
function yourprefix_hide_if_no_cats( $field ) {
	// Don't show this field if not in the cats category.
	if ( ! has_tag( 'cats', $field->object_id ) ) {
		return false;
	}
	return true;
}

/**
 * Manually render a field.
 *
 * @param array $field_args Array of field arguments.
 * @param CMB2_Field $field The field object.
 */
function yourprefix_render_row_cb( $field_args, $field ) {
	$classes = $field->row_classes();
	$id = $field->args( 'id' );
	$label = $field->args( 'name' );
	$name = $field->args( '_name' );
	$value = $field->escaped_value();
	$description = $field->args( 'description' );
	?>
	<div class="custom-field-row <?php echo esc_attr( $classes ); ?>">
		<label for="<?php echo esc_attr( $id ); ?>"><?php echo esc_html( $label ); ?></label>
		<input id="<?php echo esc_attr( $id ); ?>" type="text" name="<?php echo esc_attr( $name ); ?>" value="<?php echo $value; ?>"/>
		<?php echo esc_html( $description ); ?>
	</div>
	<?php
}

/**
 * Manually render a field column display.
 *
 * @param array $field_args Array of field arguments.
 * @param CMB2_Field $field The field object.
 */
function yourprefix_display_text_small_column( $field_args, $field ) {
	?>
	<div class="custom-column-display <?php echo esc_attr( $field->row_classes() ); ?>">
		<?php echo $field->escaped_value(); ?>
		<?php echo esc_html( $field->args( 'description' ) ); ?>
	</div>
	<?php
}

/**
 * Conditionally displays a message if the $post_id is 2
 *
 * @param array $field_args Array of field parameters.
 * @param CMB2_Field $field Field object.
 */
function yourprefix_before_row_if_2( $field_args, $field ) {
	if ( 2 == $field->object_id ) {
		echo 'Testing "before_row" parameter (on $post_id 2)';
	} else {
		echo 'Testing "before_row" parameter (NOT on $post_id 2)';
	}
}

add_action( 'cmb2_admin_init', 'yourprefix_register_demo_metabox' );
/**
 * Hook in and add a demo metabox. Can only happen on the 'cmb2_admin_init' or 'cmb2_init' hook.
 */
function yourprefix_register_demo_metabox() {
	$prefix = 'yourprefix_demo_';

/**
	 * Sample metabox to demonstrate each field type included
	 */
	$cmb_demo = new_cmb2_box( array(
		'id'            => $prefix . 'metabox',
		'title'         => esc_html__( 'Test Metabox', 'cmb2' ),
		'object_types'  => array( 'page' ), // Post type
		// 'show_on_cb' => 'yourprefix_show_if_front_page', // function should return a bool value
		// 'context'    => 'normal',
		// 'priority'   => 'high',
		// 'show_names' => true, // Show field names on the left
		// 'cmb_styles' => false, // false to disable the CMB stylesheet
		// 'closed'     => true, // true to keep the metabox closed by default
		// 'classes'    => 'extra-class', // Extra cmb2-wrap classes
		// 'classes_cb' => 'yourprefix_add_some_classes', // Add classes through a callback.
	) );

$cmb_demo->add_field( array(
		'name'       => esc_html__( 'Test Text', 'cmb2' ),
		'desc'       => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'         => $prefix . 'text',
		'type'       => 'text',
		'show_on_cb' => 'yourprefix_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,
		// 'column'          => true, // Display field value in the admin post-listing columns
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Text Small', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textsmall',
		'type' => 'text_small',
		// 'repeatable' => true,
		// 'column' => array(
		// 	'name'     => esc_html__( 'Column Title', 'cmb2' ), // Set the admin column title
		// 	'position' => 2, // Set as the second column.
		// );
		// 'display_cb' => 'yourprefix_display_text_small_column', // Output the display of the column values through a callback.
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Text Medium', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textmedium',
		'type' => 'text_medium',
	) );

$cmb_demo->add_field( array(
		'name'       => esc_html__( 'Read-only Disabled Field', 'cmb2' ),
		'desc'       => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'         => $prefix . 'readonly',
		'type'       => 'text_medium',
		'default'    => esc_attr__( 'Hey there, I\'m a read-only field', 'cmb2' ),
		'save_field' => false, // Disables the saving of this field.
		'attributes' => array(
			'disabled' => 'disabled',
			'readonly' => 'readonly',
		),
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Custom Rendered Field', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'render_row_cb',
		'type' => 'text',
		'render_row_cb' => 'yourprefix_render_row_cb',
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Website URL', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'url',
		'type' => 'text_url',
		// 'protocols' => array('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet'), // Array of allowed protocols
		// 'repeatable' => true,
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Text Email', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'email',
		'type' => 'text_email',
		// 'repeatable' => true,
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Time', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'time',
		'type' => 'text_time',
		// 'time_format' => 'H:i', // Set to 24hr format
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Time zone', 'cmb2' ),
		'desc' => esc_html__( 'Time zone', 'cmb2' ),
		'id'   => $prefix . 'timezone',
		'type' => 'select_timezone',
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Date Picker', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textdate',
		'type' => 'text_date',
		// 'date_format' => 'Y-m-d',
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Date Picker (UNIX timestamp)', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textdate_timestamp',
		'type' => 'text_date_timestamp',
		// 'timezone_meta_key' => $prefix . 'timezone', // Optionally make this field honor the timezone selected in the select_timezone specified above
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Date/Time Picker Combo (UNIX timestamp)', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'datetime_timestamp',
		'type' => 'text_datetime_timestamp',
	) );

// This text_datetime_timestamp_timezone field type
	// is only compatible with PHP versions 5.3 or above.
	// Feel free to uncomment and use if your server meets the requirement
	// $cmb_demo->add_field( array(
	// 	'name' => esc_html__( 'Test Date/Time Picker/Time zone Combo (serialized DateTime object)', 'cmb2' ),
	// 	'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
	// 	'id'   => $prefix . 'datetime_timestamp_timezone',
	// 	'type' => 'text_datetime_timestamp_timezone',
	// ) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Money', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textmoney',
		'type' => 'text_money',
		// 'before_field' => '£', // override '$' symbol if needed
		// 'repeatable' => true,
	) );

$cmb_demo->add_field( array(
		'name'    => esc_html__( 'Test Color Picker', 'cmb2' ),
		'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'      => $prefix . 'colorpicker',
		'type'    => 'colorpicker',
		'default' => '#ffffff',
		// 'options' => array(
		// 	'alpha' => true, // Make this a rgba color picker.
		// ),
		// 'attributes' => array(
		// 	'data-colorpicker' => json_encode( array(
		// 		'palettes' => array( '#3dd0cc', '#ff834c', '#4fa2c0', '#0bc991', ),
		// 	) ),
		// ),
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Text Area', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textarea',
		'type' => 'textarea',
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Text Area Small', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textareasmall',
		'type' => 'textarea_small',
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Text Area for Code', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'textarea_code',
		'type' => 'textarea_code',
		// 'attributes' => array(
		// 	// Optionally override the code editor defaults.
		// 	'data-codeeditor' => json_encode( array(
		// 		'codemirror' => array(
		// 			'lineNumbers' => false,
		// 			'mode' => 'css',
		// 		),
		// 	) ),
		// ),
		// To keep the previous formatting, you can disable codemirror.
		// 'options' => array( 'disable_codemirror' => true ),
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Title Weeeee', 'cmb2' ),
		'desc' => esc_html__( 'This is a title description', 'cmb2' ),
		'id'   => $prefix . 'title',
		'type' => 'title',
	) );

$cmb_demo->add_field( array(
		'name'             => esc_html__( 'Test Select', 'cmb2' ),
		'desc'             => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'               => $prefix . 'select',
		'type'             => 'select',
		'show_option_none' => true,
		'options'          => array(
			'standard' => esc_html__( 'Option One', 'cmb2' ),
			'custom'   => esc_html__( 'Option Two', 'cmb2' ),
			'none'     => esc_html__( 'Option Three', 'cmb2' ),
		),
	) );

$cmb_demo->add_field( array(
		'name'             => esc_html__( 'Test Radio inline', 'cmb2' ),
		'desc'             => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'               => $prefix . 'radio_inline',
		'type'             => 'radio_inline',
		'show_option_none' => 'No Selection',
		'options'          => array(
			'standard' => esc_html__( 'Option One', 'cmb2' ),
			'custom'   => esc_html__( 'Option Two', 'cmb2' ),
			'none'     => esc_html__( 'Option Three', 'cmb2' ),
		),
	) );

$cmb_demo->add_field( array(
		'name'    => esc_html__( 'Test Radio', 'cmb2' ),
		'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'      => $prefix . 'radio',
		'type'    => 'radio',
		'options' => array(
			'option1' => esc_html__( 'Option One', 'cmb2' ),
			'option2' => esc_html__( 'Option Two', 'cmb2' ),
			'option3' => esc_html__( 'Option Three', 'cmb2' ),
		),
	) );

$cmb_demo->add_field( array(
		'name'     => esc_html__( 'Test Taxonomy Radio', 'cmb2' ),
		'desc'     => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'       => $prefix . 'text_taxonomy_radio',
		'type'     => 'taxonomy_radio', // Or `taxonomy_radio_inline`/`taxonomy_radio_hierarchical`
		'taxonomy' => 'category', // Taxonomy Slug
		// 'inline'  => true, // Toggles display to inline
	) );

$cmb_demo->add_field( array(
		'name'     => esc_html__( 'Test Taxonomy Select', 'cmb2' ),
		'desc'     => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'       => $prefix . 'taxonomy_select',
		'type'     => 'taxonomy_select',
		'taxonomy' => 'category', // Taxonomy Slug
	) );

$cmb_demo->add_field( array(
		'name'     => esc_html__( 'Test Taxonomy Multi Checkbox', 'cmb2' ),
		'desc'     => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'       => $prefix . 'multitaxonomy',
		'type'     => 'taxonomy_multicheck', // Or `taxonomy_multicheck_inline`/`taxonomy_multicheck_hierarchical`
		'taxonomy' => 'post_tag', // Taxonomy Slug
		// 'inline'  => true, // Toggles display to inline
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Checkbox', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'checkbox',
		'type' => 'checkbox',
	) );

$cmb_demo->add_field( array(
		'name'    => esc_html__( 'Test Multi Checkbox', 'cmb2' ),
		'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'      => $prefix . 'multicheckbox',
		'type'    => 'multicheck',
		// 'multiple' => true, // Store values in individual rows
		'options' => array(
			'check1' => esc_html__( 'Check One', 'cmb2' ),
			'check2' => esc_html__( 'Check Two', 'cmb2' ),
			'check3' => esc_html__( 'Check Three', 'cmb2' ),
		),
		// 'inline'  => true, // Toggles display to inline
	) );

$cmb_demo->add_field( array(
		'name'    => esc_html__( 'Test wysiwyg', 'cmb2' ),
		'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'      => $prefix . 'wysiwyg',
		'type'    => 'wysiwyg',
		'options' => array(
			'textarea_rows' => 5,
		),
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'Test Image', 'cmb2' ),
		'desc' => esc_html__( 'Upload an image or enter a URL.', 'cmb2' ),
		'id'   => $prefix . 'image',
		'type' => 'file',
	) );

$cmb_demo->add_field( array(
		'name'         => esc_html__( 'Multiple Files', 'cmb2' ),
		'desc'         => esc_html__( 'Upload or add multiple images/attachments.', 'cmb2' ),
		'id'           => $prefix . 'file_list',
		'type'         => 'file_list',
		'preview_size' => array( 100, 100 ), // Default: array( 50, 50 )
	) );

$cmb_demo->add_field( array(
		'name' => esc_html__( 'oEmbed', 'cmb2' ),
		'desc' => sprintf(
			/* translators: %s: link to codex.wordpress.org/Embeds */
			esc_html__( 'Enter a youtube, twitter, or instagram URL. Supports services listed at %s.', 'cmb2' ),
			'<a href="https://codex.wordpress.org/Embeds">codex.wordpress.org/Embeds</a>'
		),
		'id' => $prefix . 'embed',
		'type' => 'oembed',
	) );

$cmb_demo->add_field( array(
		'name' => 'Testing Field Parameters',
		'id' => $prefix . 'parameters',
		'type' => 'text',
		'before_row' => 'yourprefix_before_row_if_2', // callback.
		'before' => 'Testing "before" parameter',
		'before_field' => 'Testing "before_field" parameter',
		'after_field' => 'Testing "after_field" parameter',
		'after' => 'Testing "after" parameter',
		'after_row' => 'Testing "after_row" parameter',
	) );

}

add_action( 'cmb2_admin_init', 'yourprefix_register_about_page_metabox' );
/**
 * Hook in and add a metabox that only appears on the 'About' page
 */
function yourprefix_register_about_page_metabox() {
	$prefix = 'yourprefix_about_';

/**
	 * Metabox to be displayed on a single page ID
	 */
	$cmb_about_page = new_cmb2_box( array(
		'id'           => $prefix . 'metabox',
		'title'        => esc_html__( 'About Page Metabox', 'cmb2' ),
		'object_types' => array( 'page' ), // Post type
		'context'      => 'normal',
		'priority'     => 'high',
		'show_names'   => true, // Show field names on the left
		'show_on'      => array(
			'id' => array( 2 ),
		), // Specific post IDs to display this metabox
	) );

$cmb_about_page->add_field( array(
		'name' => esc_html__( 'Test Text', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'text',
		'type' => 'text',
	) );

}

add_action( 'cmb2_admin_init', 'yourprefix_register_repeatable_group_field_metabox' );
/**
 * Hook in and add a metabox to demonstrate repeatable grouped fields
 */
function yourprefix_register_repeatable_group_field_metabox() {
	$prefix = 'yourprefix_group_';

/**
	 * Repeatable Field Groups
	 */
	$cmb_group = new_cmb2_box( array(
		'id'           => $prefix . 'metabox',
		'title'        => esc_html__( 'Repeating Field Group', 'cmb2' ),
		'object_types' => array( 'page' ),
	) );

// $group_field_id is the field id string, so in this case: $prefix . 'demo'
	$group_field_id = $cmb_group->add_field( array(
		'id'          => $prefix . 'demo',
		'type'        => 'group',
		'description' => esc_html__( 'Generates reusable form entries', 'cmb2' ),
		'options'     => array(
			'group_title'   => esc_html__( 'Entry {#}', 'cmb2' ), // {#} gets replaced by row number
			'add_button'    => esc_html__( 'Add Another Entry', 'cmb2' ),
			'remove_button' => esc_html__( 'Remove Entry', 'cmb2' ),
			'sortable'      => true,
			// 'closed'     => true, // true to have the groups closed by default
		),
	) );

/**
	 * Group fields works the same, except ids only need
	 * to be unique to the group. Prefix is not needed.
	 *
	 * The parent field's id needs to be passed as the first argument.
	 */
	$cmb_group->add_group_field( $group_field_id, array(
		'name'       => esc_html__( 'Entry Title', 'cmb2' ),
		'id'         => 'title',
		'type'       => 'text',
		// 'repeatable' => true, // Repeatable fields are supported w/in repeatable groups (for most types)
	) );

$cmb_group->add_group_field( $group_field_id, array(
		'name'        => esc_html__( 'Description', 'cmb2' ),
		'description' => esc_html__( 'Write a short description for this entry', 'cmb2' ),
		'id'          => 'description',
		'type'        => 'textarea_small',
	) );

$cmb_group->add_group_field( $group_field_id, array(
		'name' => esc_html__( 'Entry Image', 'cmb2' ),
		'id'   => 'image',
		'type' => 'file',
	) );

$cmb_group->add_group_field( $group_field_id, array(
		'name' => esc_html__( 'Image Caption', 'cmb2' ),
		'id'   => 'image_caption',
		'type' => 'text',
	) );

}

add_action( 'cmb2_admin_init', 'yourprefix_register_user_profile_metabox' );
/**
 * Hook in and add a metabox to add fields to the user profile pages
 */
function yourprefix_register_user_profile_metabox() {
	$prefix = 'yourprefix_user_';

/**
	 * Metabox for the user profile screen
	 */
	$cmb_user = new_cmb2_box( array(
		'id'               => $prefix . 'edit',
		'title'            => esc_html__( 'User Profile Metabox', 'cmb2' ), // Doesn't output for user boxes
		'object_types'     => array( 'user' ), // Tells CMB2 to use user_meta vs post_meta
		'show_names'       => true,
		'new_user_section' => 'add-new-user', // where form will show on new user page. 'add-existing-user' is only other valid option.
	) );

$cmb_user->add_field( array(
		'name'     => esc_html__( 'Extra Info', 'cmb2' ),
		'desc'     => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'       => $prefix . 'extra_info',
		'type'     => 'title',
		'on_front' => false,
	) );

$cmb_user->add_field( array(
		'name'    => esc_html__( 'Avatar', 'cmb2' ),
		'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'      => $prefix . 'avatar',
		'type'    => 'file',
	) );

$cmb_user->add_field( array(
		'name' => esc_html__( 'Facebook URL', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'facebookurl',
		'type' => 'text_url',
	) );

$cmb_user->add_field( array(
		'name' => esc_html__( 'Twitter URL', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'twitterurl',
		'type' => 'text_url',
	) );

$cmb_user->add_field( array(
		'name' => esc_html__( 'Google+ URL', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'googleplusurl',
		'type' => 'text_url',
	) );

$cmb_user->add_field( array(
		'name' => esc_html__( 'Linkedin URL', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'linkedinurl',
		'type' => 'text_url',
	) );

$cmb_user->add_field( array(
		'name' => esc_html__( 'User Field', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'user_text_field',
		'type' => 'text',
	) );

}

add_action( 'cmb2_admin_init', 'yourprefix_register_taxonomy_metabox' );
/**
 * Hook in and add a metabox to add fields to taxonomy terms
 */
function yourprefix_register_taxonomy_metabox() {
	$prefix = 'yourprefix_term_';

/**
	 * Metabox to add fields to categories and tags
	 */
	$cmb_term = new_cmb2_box( array(
		'id'               => $prefix . 'edit',
		'title'            => esc_html__( 'Category Metabox', 'cmb2' ), // Doesn't output for term boxes
		'object_types'     => array( 'term' ), // Tells CMB2 to use term_meta vs post_meta
		'taxonomies'       => array( 'category', 'post_tag' ), // Tells CMB2 which taxonomies should have these fields
		// 'new_term_section' => true, // Will display in the "Add New Category" section
	) );

$cmb_term->add_field( array(
		'name'     => esc_html__( 'Extra Info', 'cmb2' ),
		'desc'     => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'       => $prefix . 'extra_info',
		'type'     => 'title',
		'on_front' => false,
	) );

$cmb_term->add_field( array(
		'name' => esc_html__( 'Term Image', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'avatar',
		'type' => 'file',
	) );

$cmb_term->add_field( array(
		'name' => esc_html__( 'Arbitrary Term Field', 'cmb2' ),
		'desc' => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'   => $prefix . 'term_text_field',
		'type' => 'text',
	) );

}

add_action( 'cmb2_admin_init', 'yourprefix_register_theme_options_metabox' );
/**
 * Hook in and register a metabox to handle a theme options page and adds a menu item.
 */
function yourprefix_register_theme_options_metabox() {

/**
	 * Registers options page menu item and form.
	 */
	$cmb_options = new_cmb2_box( array(
		'id'           => 'yourprefix_theme_options_page',
		'title'        => esc_html__( 'Theme Options', 'cmb2' ),
		'object_types' => array( 'options-page' ),

/*
		 * The following parameters are specific to the options-page box
		 * Several of these parameters are passed along to add_menu_page()/add_submenu_page().
		 */

'option_key'      => 'yourprefix_theme_options', // The option key and admin menu page slug.
		'icon_url'        => 'dashicons-palmtree', // Menu icon. Only applicable if 'parent_slug' is left empty.
		// 'menu_title'      => esc_html__( 'Options', 'cmb2' ), // Falls back to 'title' (above).
		// 'parent_slug'     => 'themes.php', // Make options page a submenu item of the themes menu.
		// 'capability'      => 'manage_options', // Cap required to view options-page.
		// 'position'        => 1, // Menu position. Only applicable if 'parent_slug' is left empty.
		// 'admin_menu_hook' => 'network_admin_menu', // 'network_admin_menu' to add network-level options page.
		// 'display_cb'      => false, // Override the options-page form output (CMB2_Hookup::options_page_output()).
		// 'save_button'     => esc_html__( 'Save Theme Options', 'cmb2' ), // The text for the options-page save button. Defaults to 'Save'.
		// 'disable_settings_errors' => true, // On settings pages (not options-general.php sub-pages), allows disabling.
		// 'message_cb'      => 'yourprefix_options_page_message_callback',
		// 'tab_group'       => '', // Tab-group identifier, enables options page tab navigation.
		// 'tab_title'       => null, // Falls back to 'title' (above).
		// 'autoload'        => false, // Defaults to true, the options-page option will be autloaded.
	) );

/**
	 * Options fields ids only need
	 * to be unique within this box.
	 * Prefix is not needed.
	 */
	$cmb_options->add_field( array(
		'name'    => esc_html__( 'Site Background Color', 'cmb2' ),
		'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
		'id'      => 'bg_color',
		'type'    => 'colorpicker',
		'default' => '#ffffff',
	) );

}

/**
 * Callback to define the optionss-saved message.
 *
 * @param CMB2 $cmb The CMB2 object.
 * @param array $args {
 * An array of message arguments
 *
 * @type bool $is_options_page Whether current page is this options page.
 * @type bool $should_notify Whether options were saved and we should be notified.
 * @type bool $is_updated Whether options were updated with save (or stayed the same).
 * @type string $setting For add_settings_error(), Slug title of the setting to which
 * this error applies.
 * @type string $code For add_settings_error(), Slug-name to identify the error.
 * Used as part of 'id' attribute in HTML output.
 * @type string $message For add_settings_error(), The formatted message text to display
 * to the user (will be shown inside styled `<div>` and `` tags).
 * Will be 'Settings updated.' if $is_updated is true, else 'Nothing to update.'
 * @type string $type For add_settings_error(), Message type, controls HTML class.
 * Accepts 'error', 'updated', '', 'notice-warning', etc.
 * Will be 'updated' if $is_updated is true, else 'notice-warning'.
 * }
 */
function yourprefix_options_page_message_callback( $cmb, $args ) {
	if ( ! empty( $args['should_notify'] ) ) {

if ( $args['is_updated'] ) {

// Modify the updated message.
			$args['message'] = sprintf( esc_html__( '%s &mdash; Updated!', 'cmb2' ), $cmb->prop( 'title' ) );
		}

add_settings_error( $args['setting'], $args['code'], $args['message'], $args['type'] );
	}
}

/**
 * Only show this box in the CMB2 REST API if the user is logged in.
 *
 * @param  bool                 $is_allowed     Whether this box and its fields are allowed to be viewed.
 * @param  CMB2_REST_Controller $cmb_controller The controller object.
 *                                              CMB2 object available via `$cmb_controller->rest_box->cmb`.
 *
 * @return bool                 Whether this box and its fields are allowed to be viewed.
 */
function yourprefix_limit_rest_view_to_logged_in_users( $is_allowed, $cmb_controller ) {
	if ( ! is_user_logged_in() ) {
		$is_allowed = false;
	}

return $is_allowed;
}

add_action( 'cmb2_init', 'yourprefix_register_rest_api_box' );
/**
 * Hook in and add a box to be available in the CMB2 REST API. Can only happen on the 'cmb2_init' hook.
 * More info: https://github.com/CMB2/CMB2/wiki/REST-API
 */
function yourprefix_register_rest_api_box() {
	$prefix = 'yourprefix_rest_';

$cmb_rest = new_cmb2_box( array(
		'id'            => $prefix . 'metabox',
		'title'         => esc_html__( 'REST Test Box', 'cmb2' ),
		'object_types'  => array( 'page' ), // Post type
		'show_in_rest' => WP_REST_Server::ALLMETHODS, // WP_REST_Server::READABLE|WP_REST_Server::EDITABLE, // Determines which HTTP methods the box is visible in.
		// Optional callback to limit box visibility.
		// See: https://github.com/CMB2/CMB2/wiki/REST-API#permissions
		// 'get_box_permissions_check_cb' => 'yourprefix_limit_rest_view_to_logged_in_users',
	) );

$cmb_rest->add_field( array(
		'name'       => esc_html__( 'REST Test Text', 'cmb2' ),
		'desc'       => esc_html__( 'Will show in the REST API for this box and for pages.', 'cmb2' ),
		'id'         => $prefix . 'text',
		'type'       => 'text',
	) );

$cmb_rest->add_field( array(
		'name'       => esc_html__( 'REST Editable Test Text', 'cmb2' ),
		'desc'       => esc_html__( 'Will show in REST API "editable" contexts only (`POST` requests).', 'cmb2' ),
		'id'         => $prefix . 'editable_text',
		'type'       => 'text',
		'show_in_rest' => WP_REST_Server::EDITABLE,// WP_REST_Server::ALLMETHODS|WP_REST_Server::READABLE, // Determines which HTTP methods the field is visible in. Will override the cmb2_box 'show_in_rest' param.
	) );
}

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