(PECL ev >= 0.2.0)
EvLoop::child — Creates EvChild object associated with the current event loop
final public EvLoop::child ( string $pid , string $trace , string $callback [, string $data [, string $priority ]] ) : EvChild
Creates EvChild object associated with the current event loop.
All parameters have the same meaning as for EvChild::__construct()
Returns EvChild object on success.
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https://www.php.net/manual/en/evloop.child.php