Dynamic Trial Subscription

dynamic_trial_subscription.php

<?php
/* This will alter the subscription so that the trial days will changed based on the date
 * - it only works if a trial is enabled on the product/membership for the subscription
 *   but it will alter the number of days in the trial.
 */
$my_product_id = 4519;
$fixed_date = strtotime('2017-12-03 00:00:00');

add_filter('mepr-set-model-attribute-trial_days', 'override_trial_days');
function override_trial_days($value, $obj) {
  global $my_product_id, $fixed_date;

  $now = time();
  $days = (int)(($fixed_date - $now) / DAY_IN_SECONDS);

  if($obj instanceof MeprSubscription && $obj->product_id==$my_product_id) {
    return $days;
  }
  
  return $value;
}