(PECL gearman >= 0.5.0)
GearmanClient::setWarningCallback — Set a callback for worker warnings
public GearmanClient::setWarningCallback ( callable $callback ) : bool
Sets a function to be called when a worker sends a warning. The callback should accept a single argument, a GearmanTask object.
callback
A function to call
Returns true
on success or false
on failure.
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https://www.php.net/manual/en/gearmanclient.setwarningcallback.php