bp_admin_setting_callback_register()

function bp_admin_setting_callback_register() {
	?>

	<input id="bp-enable-site-registration" name="bp-enable-site-registration" type="checkbox" value="1" <?php checked( bp_enable_site_registration() ); ?> />
	<label for="bp-enable-site-registration"><?php _e( 'Allow non-members to register new accounts', 'buddyboss' ); ?></label>
	<?php
	if ( false === bp_enable_site_registration() && bp_is_active( 'invites' ) ) {
		printf( '<p class="description">%s</p>',
			sprintf( __( 'Because <a href="%s">Email Invites</a> is enabled, invited users will still be allowed to register new accounts.',
				'buddyboss' ),
				add_query_arg( [
					'page' => 'bp-settings',
					'tab'  => 'bp-invites',
				],
					admin_url( 'admin.php' ) ) ) );
	}
}