(PECL ev >= 0.2.0)
EvChild::set — Configures the watcher
public EvChild::set ( int $pid , bool $trace ) : void
pid
The same as for EvChild::__construct()
trace
The same as for EvChild::__construct()
No value is returned.
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https://www.php.net/manual/en/evchild.set.php