範例 #1 基本的 Gearman 用戶端和 worker，背景
這個範例展示了一個非常簡單的客戶端和工作端。客戶端將一個字串作為背景作業發送到作業伺服器，而工作端則反轉該字串。請注意，由於工作是以非同步方式執行的，因此客戶端不會等待作業完成即會退出（因此客戶端永遠不會收到結果）。
<?php
# 建立我們的客戶端物件
$gmclient= new GearmanClient();
# 加入預設伺服器 (localhost)
$gmclient->addServer();
# 在背景執行反轉客戶端
$job_handle = $gmclient->doBackground("reverse", "this is a test");
if ($gmclient->returnCode() != GEARMAN_SUCCESS)
{
echo "bad return code\n";
exit;
}
echo "done!\n";
?><?php
echo "Starting\n";
# Create our worker object.
$gmworker= new GearmanWorker();
# Add default server (localhost).
$gmworker->addServer();
# Register function "reverse" with the server. Change the worker function to
# "reverse_fn_fast" for a faster worker with no output.
$gmworker->addFunction("reverse", "reverse_fn");
print "Waiting for job...\n";
while($gmworker->work())
{
if ($gmworker->returnCode() != GEARMAN_SUCCESS)
{
echo "return_code: " . $gmworker->returnCode() . "\n";
break;
}
}
function reverse_fn($job)
{
echo "Received job: " . $job->handle() . "\n";
$workload = $job->workload();
$workload_size = $job->workloadSize();
echo "Workload: $workload ($workload_size)\n";
# This status loop is not needed, just showing how it works
for ($x= 0; $x < $workload_size; $x++)
{
echo "Sending status: " . ($x + 1) . "/$workload_size complete\n";
$job->sendStatus($x, $workload_size);
sleep(1);
}
$result= strrev($workload);
echo "Result: $result\n";
# Return what we want to send back to the client.
return $result;
}
# A much simpler and less verbose version of the above function would be:
function reverse_fn_fast($job)
{
return strrev($job->workload());
}
?>上述範例將輸出類似以下的內容
% php reverse_worker.php Starting Waiting for job... Received job: H:foo.local:41 Workload: this is a test (14) 1/14 complete 2/14 complete 3/14 complete 4/14 complete 5/14 complete 6/14 complete 7/14 complete 8/14 complete 9/14 complete 10/14 complete 11/14 complete 12/14 complete 13/14 complete 14/14 complete Result: tset a si siht
% php reverse_client_bg.php done!