Allow Drupal's user 1 to clear the APC cache.

clear-apc-caches.php

<?php
define('DRUPAL_ROOT', getcwd());

require_once DRUPAL_ROOT . '/includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);


if ($user->uid == 1) {
  if (function_exists('apc_clear_cache')) {
    apc_clear_cache('opcode');
    drupal_set_message('APC cache cleared');
  }
  else {
    drupal_set_message('APC api not available');
  }
  drupal_deliver_page('');
}
else{
  drupal_deliver_page(MENU_ACCESS_DENIED);
}