Assign a LEVEL to a unique role with Expiration Date

assign_pmpro_level_to_role.php

<?php
/**
 * Assign a LEVEL to a unique role with Expiration Date
 * 
 * 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 assign_pmpro_level_to_role($user_id, $role, $old_roles)
{
	//we found a role related to pmpro level
	if($role == "shop_manager")
	{
		$changed_level = get_user_meta( $user_id, 'changed_level', true );
		
		if ( empty( $changed_level ) || $changed_level !== 2 ) {

			$changed_level					= array();
			$changed_level['user_id'] 		= $user_id;
			$changed_level['membership_id'] = 2;
			
			// Expiration Date
			$changed_level['enddate']       = date( '2021-12-31 00:00:00');
			$changed = pmpro_changeMembershipLevel( $changed_level, $user_id );
			update_user_meta( $user_id, 'changed_level', 2 );
		}
		else
		delete_user_meta($user_id, 'changed_level');

	}
}

add_action('set_user_role', 'assign_pmpro_level_to_role', 10, 3);