(PECL ev >= 0.2.0)
EvSignal::__construct — Constructs EvPeriodic watcher object
$signum
   
   , 
    callable
     $callback
   
   [, 
    mixed
     $data
     = NULL
   
   [, 
    int
     $priority
     = 0
   
  ]] )Constructs EvPeriodic watcher object and starts it automatically. For a stopped periodic watcher consider using EvSignal::createStopped() method.
signum
    Signal number. See constants exported by pcntl extension. See also signal(7) man page.
callback
    See Watcher callbacks .
data
    Custom data associated with the watcher.
priority
    Returns EvSignal object on success.
Example #1 Handle SIGTERM signal
<?php
$w = new EvSignal(SIGTERM, function ($watcher) {
    echo "SIGTERM received\n";
    $watcher->stop();
});
Ev::run();
?>