Description:
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Posting this so it ends up in the archive where others might find it ....  if 
your setCompleteCallback is not working this may be why.



I spent several hours friday trying to debug code that used to work and stopped 
when we updated the libgearman php library.  What I eventually found is that 
with extension 0.8.1 and libgearman 33 the setCompleteCallback() MUST happen 
*before * calling addTask().    This doesn't appear to have been the case with 
earlier libgearman versions



What we had was



$gmclient->addTask('foo','bar');

$gmclient->setCompleteCallback('foodone');

$gmclient->runTasks();



That does not work - however this does.



$gmclient->setCompleteCallback('foodone');

$gmclient->addTask('foo','bar');

$gmclient->runTasks();



Not helped by having an old version of libgearman on my dev box where it did 
work.