(PECL gearman >= 0.5.0)
GearmanWorker::work — Wait for and perform jobs
   Waits for a job to be assigned and then calls the appropriate callback function.
   Issues an E_WARNING with the last Gearman error if the return
   code is not one of GEARMAN_SUCCESS, GEARMAN_IO_WAIT,
   or GEARMAN_WORK_FAIL.
  
This function has no parameters.
   Returns TRUE on success or FALSE on failure.
  
Example #1 GearmanWorker::work() example
<?php
# create the worker
$worker = new GearmanWorker(); 
# add the default job server (localhost)
$worker->addServer(); 
# add the reverse function
$worker->addFunction("reverse", "my_reverse_function"); 
# start te worker listening for job submissions
while ($worker->work()); 
 
function my_reverse_function($job) 
{ 
  return strrev($job->workload()); 
}
?>