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(PECL gearman >= 0.5.0)
GearmanClient::echo — Send data to all job servers to see if they echo it back [deprecated]
$workload
)The GearmanClient::echo() method is deprecated as of pecl/gearman 1.0.0. Use GearmanClient::ping() .
workload
Some arbitrary serialized data to be echo back
成功时返回 TRUE
, 或者在失败时返回 FALSE
。