PHP Cloud Functions + Cloud Logging SDK

deployment.sh

#!/bin/bash

PROJECT=$(gcloud config get-value project)
FUNCTION_NAME="${1:-ash-test}"
REGION="${2:-us-central1}"
ENTRYPOINT="${3:-helloHttp}"

gcloud functions deploy $FUNCTION_NAME \
  --runtime php74 \
  --trigger-http \
  --entry-point $ENTRYPOINT \
  --set-env-vars=REGION=$REGION,FUNCTION=$FUNCTION_NAME,PROJECT_ID=$PROJECT

index.php

<?php
use Psr\Http\Message\ServerRequestInterface;
use Google\Cloud\Logging\LoggingClient;

function helloHttp(ServerRequestInterface $request): string {
    $queryString = $request->getQueryParams();
    $name = $queryString['name'] ?? 'world';

    $logging = new LoggingClient();
    $logger = $logging->psrLogger('app', [
        'resource' => [
            'type' => 'cloud_function',
            'labels' => [
                'function_name' => $_ENV['FUNCTION'],
                'region' => $_ENV['REGION'],
            ],
        ],
        'labels' => [
            'execution_id' => $_ENV['HTTP_FUNCTION_EXECUTION_ID'],
        ]
    ]);

    // Fetch the Trace ID
    $traceContext = $_ENV['HTTP_X_CLOUD_TRACE_CONTEXT'] ?? '';
    $tradeID = explode("/", $traceContext)[0];
    
    // Configure tracing context for logging
    $loggerOptions = [
        "stackdriverOptions" => [
            "trace" => "projects/{$_ENV['PROJECT_ID']}/traces/{$tradeID}",
        ],
    ];

    $logger->error("hello world", $loggerOptions);

    return sprintf('Hello, %s!', $name);
}