appengine/standard/logging/index.php

<?php

/**
 * Copyright 2018 Google Inc.
 *
 * 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.
 */
require __DIR__ . '/vendor/autoload.php';

use Google\Cloud\Logging\LoggingClient;

// Create a PSR-3-Compatible logger
$logger = LoggingClient::psrBatchLogger('app');

// Log messages with varying log levels.
$logger->info('This will show up as log level INFO');
$logger->warning('This will show up as log level WARNING');
$logger->error('This will show up as log level ERROR');

// Create the proper filter to view the logs in Stackdriver
$projectId = getenv('GOOGLE_CLOUD_PROJECT');
$moduleId = getenv('GAE_SERVICE');
$versionId = getenv('GAE_VERSION');

$resource = sprintf(
    'gae_app/module_id/%s/version_id/%s',
    $moduleId,
    $versionId
);
$logName = sprintf('projects/%s/logs/app', $projectId);

$url = sprintf(
    'https://console.cloud.google.com/logs/viewer?resource=%s&logName=%s',
    urlencode($resource),
    urlencode($logName)
);

?>

<p>Logged INFO, WARNING, and ERROR log levels. Visit the URL below to see them:</p>

<p><a href="<?= $url ?>"><?= $url ?></a></p>

<?php phpinfo() ?>