Cancel On Next Payment Date Add On - Do not extend membership to next payment date when member in a trial period

my-pmproconpd-cancel-trial-immediately.php

<?php
/**
 * This recipe will cancel membership immediately when
 * using the Cancel On Next Payment Date Add On and
 * not extend the membership to the next payment date
 * if the member is still in a trial period.
 *
 * This works for default trial levels as well as
 * trial periods set with the Subscription Delay Add On.
 *
 * 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_pmproconpd_cancel_trial_immediately( $level_id, $user_id, $old_levels, $cancel_level ) {

	// Only run when Cancel On Next Payment Date is active.
	if ( ! function_exists( 'pmproconpd_pmpro_before_change_membership_level' ) ) {
		return;
	}

	global $pmpro_pages, $pmpro_next_payment_timestamp;

	// Are we on the cancel page and cancelling a level?
	if ( $level_id == 0 && ( is_page( $pmpro_pages['cancel'] ) || ( is_admin() && ( empty( $_REQUEST['from'] ) || $_REQUEST['from'] != 'profile' ) ) ) ) {

		if ( empty( $pmpro_next_payment_timestamp ) || ! $pmpro_next_payment_timestamp ) {
			return;
		}
		global $pmpro_pages, $current_user;
		if ( ! is_admin() && is_user_logged_in() && pmpro_hasMembershipLevel() ) {
			$level              = pmpro_getMembershipLevelForUser( $user_id );
			$subscription_delay = get_option( 'pmpro_subscription_delay_' . $level->id, '' );
			$today              = strtotime( 'today' );
			$user_is_trialing   = false;
			if ( $subscription_delay ) {
				$level_trial_enddate = get_user_meta( $user_id, 'pmprosd_trialing_until', true );
				if ( ! empty( $level_trial_enddate ) ) {
					$level_trial_enddate = intval( $level_trial_enddate );
				}
				$new_date_timestamp = strtotime( $level_trial_enddate, $today );

				if ( $today < $level_trial_enddate ) {
					$user_is_trialing = true;
				}
			}

			if ( pmpro_isLevelTrial( $level ) ) {
				$current_user->membership_level = $level;
				$user_startdate                 = intval( $current_user->membership_level->startdate );
				$level_trial_enddate            = strtotime( '+' . $level->trial_limit . ' ' . $level->cycle_period, $user_startdate );
				if ( $today < $level_trial_enddate ) {
					$user_is_trialing = true;
				}
			}
		}
		if ( $user_is_trialing ) {
			$pmpro_next_payment_timestamp = false;
		}
	}
}
add_action( 'pmpro_before_change_membership_level', 'my_pmproconpd_cancel_trial_immediately', 20, 4 );