Description:
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addtask cant pass the reference parameter of the context 

can't return context

Test script:
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$client = new GearmanClient();
$client->addServer();

# set a function to be called when the work is complete
$client->setCompleteCallback("reverse_complete");

# Add some tasks for a placeholder of where to put the results
$results = array();
$client->addTask("reverse", "Hello World!", &$results, "t1");
$client->addTask("reverse", "!dlroW olleH", &$results, "t2");

$client->runTasks();

# The results should now be filled in from the callbacks
foreach ($results as $id => $result)
   echo $id . ": " . $result['handle'] . ", " . $result['data'] . "\n";


function reverse_complete($task, $results)
{
   $results[$task->unique()] = array("handle"=>$task->jobHandle(), "data"=>$task->data());
}


Expected result:
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t2: H.foo:21, Hello World!
t1: H:foo:22, !dlroW olleH

Actual result:
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empty