example-checkbox-grouped-user-field.php

<?php
/**
 * Example code recipe to add a checkbox grouped user field.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_example_checkbox_grouped_user_field() {
	// Don't break if PMPro is out of date or not loaded.
	if ( ! function_exists( 'pmpro_add_user_field' ) ) {
		return false;
	}

	// Store our field settings in an array.
	$fields = array();

	$fields[] = new PMPro_Field(
		'example_checkbox_grouped',                   // input name and user meta key
		'checkbox_grouped',                   // type of field
		array(
			'label'          => 'Example Checkbox Grouped',  // custom field label
			'profile'        => true, // display on user profile
			'memberslistcsv' => true, // include in CSV export
			'required'       => true, // make this field required
			'options'        => array( // <option> elements for select field
				'option1' => 'Option 1',
				'option2' => 'Option 2',
				'option3' => 'Option 3',
			),
		)
	);

	// Add a field group to put our fields into.
	pmpro_add_field_group( 'Example User Fields' );

	// Add all of our fields into that group.
	foreach ( $fields as $field ) {
		pmpro_add_user_field(
			'Example User Fields',     // Which group to add to.
			$field                  // PMPro_Field object
		);
	}

	// That's it. See the PMPro User Fields docs for more information.
}
add_action( 'init', 'my_pmpro_example_checkbox_grouped_user_field' );