change_permission.php

<?php 
//add this function to your page
//after creation of file run the function in order to change the permission

function insertPermission($service, $fileId, $value, $type, $role) {
  $newPermission = new Google_Service_Drive_Permission();
  $newPermission->setValue($value);
  $newPermission->setType($type);
  $newPermission->setRole($role);
  try {
    return $service->permissions->insert($fileId, $newPermission);
  } catch (Exception $e) {
    print "An error occurred: " . $e->getMessage();
  }
  return NULL;
}

$permission_data = insertPermission($service, $fileId, 'your email address', 'anyone', 'reader');









?>