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Expose the _X_AMZN_TRACE_ID variable in PHP-FPM too #2192

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Merged
mnapoli merged 1 commit into from
Sep 27, 2026
Merged

Expose the _X_AMZN_TRACE_ID variable in PHP-FPM too #2192

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2 changes: 1 addition & 1 deletion docs/runtimes/fpm-runtime.mdx
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Expand Up @@ -70,7 +70,7 @@ Here is an example to retrieve it:
$lambdaContext = json_decode($_SERVER['LAMBDA_INVOCATION_CONTEXT'], true);
```

The request ID of the invocation is also available directly in `$_SERVER['LAMBDA_REQUEST_ID']`, like in [the other runtimes](./runtimes-details.mdx#environment-variables).
The request ID of the invocation is also available directly in `$_SERVER['LAMBDA_REQUEST_ID']`, and the X-Ray trace ID in `$_SERVER['_X_AMZN_TRACE_ID']`, like in [the other runtimes](./runtimes-details.mdx#environment-variables).

### Request context

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3 changes: 2 additions & 1 deletion src/FpmRuntime/FpmHandler.php
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Expand Up @@ -253,8 +253,9 @@ private function eventToFastCgiRequest(HttpRequestEvent $event, Context $context
$request->setCustomVar('PATH_INFO', $event->getPath());
$request->setCustomVar('QUERY_STRING', $event->getQueryString());
$request->setCustomVar('LAMBDA_INVOCATION_CONTEXT', json_encode($context, JSON_THROW_ON_ERROR));
// Same variable as in the other runtimes, see LambdaRuntime::processNextEvent()
// Same variables as in the other runtimes, see LambdaRuntime::processNextEvent()
$request->setCustomVar('LAMBDA_REQUEST_ID', $context->getAwsRequestId());
$request->setCustomVar('_X_AMZN_TRACE_ID', $context->getTraceId());
$request->setCustomVar('LAMBDA_REQUEST_CONTEXT', json_encode($event->getRequestContext(), JSON_THROW_ON_ERROR));

$contentType = $event->getContentType();
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1 change: 1 addition & 0 deletions tests/FpmRuntime/FpmHandlerTest.php
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Expand Up @@ -1326,6 +1326,7 @@ private function assertCommonServerVariables(array $response, array $expectedGlo
'GATEWAY_INTERFACE' => 'FastCGI/1.0',
'FCGI_ROLE' => 'RESPONDER',
'LAMBDA_REQUEST_ID' => 'abc',
'_X_AMZN_TRACE_ID' => 'abc',
];

// Allow to override some keys
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