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(PECL gearman >= 0.5.0)
GearmanClient::setCompleteCallback — Set a function to be called on task completion
$callback
)Use to set a function to be called when a task is completed. The callback function should accept a single argument, a GearmanTask object.
callback
A function to be called
成功时返回 TRUE
, 或者在失败时返回 FALSE
。
[#1] Justas Butkus [2011-08-18 06:59:06]
One shall note, that callback function MUST either return a valid Gearman status code, or return nothing (do not return).
I.e. these are valid complete callbacks:
<?php
function goodCallbackOne(GearmanTask $task)
{
print_r($task);
}
?>
<?php
function goodCallbackTwo(GearmanTask $task)
{
print_r($task);
return GEARMAN_SUCCESS;
}
?>
While following is NOT, unless you want your client code to fail with Gearman error 'german wait:no active file descriptors':
<?php
function badCallbackTwo(GearmanTask $task)
{
print_r($task);
return true;
}
?>