PHP code example of moolex / opentracing

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

moolex / opentracing example snippets

    use OpenTracing\GlobalTracer;
    use AnOpenTracingImplementation\MyTracer;
    
    GlobalTracer::set(new MyTracer());

    use OpenTracing\Formats;
    use OpenTracing\GlobalTracer;

    ...

    $spanContext = GlobalTracer::get()->extract(
        Formats\HTTP_HEADERS,
        $request->getHeaders()
    );
    
    function doSomething(SpanContext $spanContext, ...) {
        ...
        
        $span = GlobalTracer::get()->startSpan('my_span', [
        	'child_of' => $spanContext,
        ]);
        
        ...
        
        $span->log([
            'event' => 'soft error',
            'type' => 'cache timeout',
            'waiter.millis' => 1500,
        ])
        
        $span->finish();
    }

    $span = $tracer->startSpan('my_span');
    ...
    $span->finish();

    function xyz(Span $parentSpan, ...) {
        ...
        $span = GlobalTracer::get()->startSpan(
        	'my_span',
        	[
        		'child_of' => $parentSpan,
        	]
        );
        
        $span->finish();
        ...
    }

    use OpenTracing\GlobalTracer;
    use OpenTracing\Formats;
    
    ...
    
    $tracer = GlobalTracer::get(); 
    
    $spanContext = $tracer->extract(
        Formats\HTTP_HEADERS,
        $request->getHeaders()
    );
    
    try {
        $span = $tracer->startSpan('my_span', ['child_of' => $spanContext]);

        $client = new GuzzleHttp\Client;
        
        $headers = [];
        
        $tracer->inject(
            $span->getContext(),
            Formats\HTTP_HEADERS,
            $headers
        );
        
        $request = new \GuzzleHttp\Psr7\Request('GET', 'http://myservice', $headers);
        $client->send($request);
        ...
    } catch (\Exception $e) {
        ...
    }
    ...        

    use OpenTracing\GlobalTracer;
    use OpenTracing\Formats;
    
    $request = Request::createFromGlobals();
    $tracer = GlobalTracer::get();
    $spanContext = $tracer->extract(Formats\HTTP_HEADERS, $request->getHeaders());
    $tracer->startSpan('my_span', [
        'child_of' => $spanContext,
    ]); 

use OpenTracing\GlobalTracer;

// Do application work, buffer spans in memory
$application->run();

fastcgi_finish_request();

$tracer = GlobalTracer::get();
$tracer->flush(); // release buffer to backend

$span = $tracer->createSpan('my_span', [
    'child_of' => $spanContext,
    'tags' => ['foo' => 'bar'],
    'start_time' => time(),
]);