Dynamic options for ACF field

dynamic_option_acf.php

<?php

/**
 * Set user roles as an option.
 *
 * @param  array $field
 * @return array
 */
function load_roles( $field ) {

	// Added this because it was giving fatal error.
	require_once ABSPATH . '/wp-admin/includes/user.php';

	// Get roles as per backend.
	$editable_roles = array_reverse( get_editable_roles() );

	// Don't show administrator. Administrator should have all the access.
	if ( ! empty( $editable_roles ) && isset( $editable_roles['administrator'] ) ) {
		unset( $editable_roles['administrator'] );
	}

	// Bail, if anything goes wrong.
	if ( empty( $editable_roles ) ) {
		return $field;
	}

	foreach ( $editable_roles as $role => $details ) {

		$name = translate_user_role( $details['name'] );

		$field['choices'][ esc_attr( $role ) ] = esc_html( $name );
	}

	return $field;

}

add_filter( 'acf/load_field/name=role', 'load_roles' );