<?php

/**
 * Copyright 2016 Seller Labs LLC
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

function snagshout_hash($secret_key, $body = '') {
  return hash_hmac(
    'sha512',
    $body . (new DateTime())->format('Y-m-d H'),
    $secret_key
  );
}

<?php

/**
 * Copyright 2016 Seller Labs LLC
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

function snagshout_hash($secret_key, $body = '') {
  return hash_hmac(
    'sha512',
    $body . gmdate('Y-m-d H'),
    $secret_key
  );
}

Use gmdate to ensure we are using UTC time
fix(core): Use gmdate to ensure we are using UTC time
