chore(functions/log_helloworld): mention var_dump (#1218)
chore(functions/log_helloworld): mention var_dump (#1218)


GoogleCloudPlatform/php-docs-samples,GoogleCloudPlatform/php-docs-samples,GoogleCloudPlatform/php-docs-samples,GoogleCloudPlatform/php-docs-samples,GoogleCloudPlatform/php-docs-samples