README

This is a read-only subtree split of https://github.com/open-telemetry/opentelemetry-php-contrib.

OpenTelemetry HTTPlug async auto-instrumentation

Please read https://opentelemetry.io/docs/instrumentation/php/automatic/ for instructions on how to install and configure the extension and SDK.

Overview

Auto-instrumentation hooks are registered via composer, which will:

• create spans automatically for each async HTTP request that is sent
• add a traceparent header to the request to facilitate distributed tracing

Configuration

The extension can be disabled via runtime configuration:

OTEL_PHP_DISABLED_INSTRUMENTATIONS=http-async-client

Request headers can be added as span attributes, if the header's name is found in the php.ini variable: otel.instrumentation.http.request_headers