(PECL gearman >= 0.6.0)
GearmanJob::sendWarning — Send a warning
public GearmanJob::sendWarning ( string $warning ) : bool
Sends a warning for this job while it is running.
warning
A warning message.
Returns true
on success or false
on failure.
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https://www.php.net/manual/en/gearmanjob.sendwarning.php