(PECL event >= 1.2.6-beta)
Event::signal — Constructs signal event object
Constructs signal event object. This is a straightforward method to create a signal event. Note, the generic Event::__construct() method can contruct signal event objects too.
The associated event base object.
The signal number.
The signal event callback. See Event callbacks .
Custom data. If specified, it will be passed to the callback when event triggers.
Returns Event object on success. Otherwise