How do I instrument Correlation IDs with OpenTelemetry?

Instrumenting Correlation IDs with OpenTelemetry is essential for tracking requests across various microservices and understanding request flow in distributed systems. Below is an example in PHP demonstrating how to set up and use Correlation IDs with OpenTelemetry.


        startSpan('handleRequest');
            $span->setAttribute('correlation_id', $requestId);
            
            // Business logic goes here
            
            $span->end();
        }

        // Simulating a web request with a correlation ID
        $correlationId = uniqid('correlation_id_', true);
        handleRequest($correlationId);
        ?>