addServer(); $client->doBackground(new Task('sleep', '5')); $client->addTask(new Task('sleep', '5', function(JobResults $job) { echo "Task {$job->getId()} completed with data: {$job->getData()} \n"; })); $client->addTask(new Task('sleep', '5', function(JobResults $job) { echo "Task {$job->getId()} completed with data: {$job->getData()} \n"; })); $client->run();