Untitled

<?php 


function set_subscriptions_to_first_of_month($subscription, $order, $recurring_cart){
  $isMembership = false;

  foreach($subscription->get_items() as $item){
    if(has_term('membership', 'product_cat', $item['product_id'])){ // Subscription was purchased from a membership product
      $isMembership = true;
    }
  }

  if($isMembership){
    $subscription_start = strtotime($subscription->schedule_start);

    // Number of days in the current month
    $number_of_days = date('t', mktime(0, 0, 0, date('m', $subscription_start), 1, date('Y', $subscription_start))); 
    
    // Day will always be the first of the month
    $date_day = 1;
    // If current day is less than halfway through the month expiry is set to first of same month
    if(date('d', $subscription_start) <= $number_of_days / 2){
      $date_month = date('m', $subscription_start);
      $date_year = date('Y', $subscription_start) + 1;
    }else{ // otherwise set to the first of the following month
      // set next month to january if the current month is december
      if(date('m', $subscription_start) >= 12){ 
        $date_month = 1;
        $date_year = date('Y', $subscription_start) + 2;
      }else{
        $date_month = date('m', $subscription_start) + 1;
        $date_year = date('Y', $subscription_start) + 1;
      }
    }

    $new_date_next = date('Y-m-d h:i:sa', mktime(0, 0, 0, $date_month, $date_day, $date_year));
    $new_date_end = date('Y-m-d h:i:sa', mktime(0, 1, 0, $date_month, $date_day, $date_year));
    
    $new_dates = array(
      'next_payment' => $new_date_next,
      'end' => $new_date_end
    );

    $subscription->update_dates($new_dates, 'America/New_York');
  }
}
add_action('woocommerce_checkout_subscription_created', 'set_subscriptions_to_first_of_month', 10, 3);