blackfire sub requests instrumentation.php

<?php

// composer require blackfire/php-sdk
// search for XXX in the snippet below

while (isset($_SERVER['HTTP_X_BLACKFIRE_QUERY'])) {
    $probe = \BlackfireProbe::getMainInstance();
    if (!$probe->disable()) {
        break;
    }
    global $blackfireBuild;

    $blackfireClient = new \Blackfire\Client(new \Blackfire\ClientConfiguration(
        /* XXX CLIENT ID */,
        /* XXX CLIENT TOKEN */
    ));

    if (null === $blackfireBuild) {
        $blackfireBuild = $blackfireClient->createBuild(/* XXX SERVER ID */, array(
            'title' => 'XXX BUILD NAME',
        ));

        parse_str($_SERVER['HTTP_X_BLACKFIRE_QUERY'], $parts);
        $agents = explode(',', $parts['agentIds']);

        $mainProfileConfig = new \Blackfire\Profile\Configuration();
        $mainProfileConfig->setTitle('Main Request');
        $mainProfileConfig->setUuid(str_replace('request-id-', '', end($agents)));
        $blackfireClient->addJobInBuild($mainProfileConfig, $blackfireBuild);

        register_shutdown_function(function() use ($probe, $blackfireClient, $blackfireBuild) {
            $probe->disable();
            $blackfireClient->endBuild($blackfireBuild);
            $probe->enable();
        });
    }

    $config = new \Blackfire\Profile\Configuration();
    $config->setSamples(1);
    $config->setBuild($blackfireBuild);
    $config->setTitle('Sub request to: XXX TARGET URL');

    $request = $blackfireClient->createRequest($config);

    // XXX ADD BLACKFIRE REQUEST HEADER
    // $headers['X-Blackfire-Query'] = $request->getToken();

    $probe->enable();
    break;
}