(PECL event >= 1.2.6-beta)
EventConfig::requireFeatures — Enters a required event method feature that the application demands
Enters a required event method feature that the application demands
feature
    
      Bitmask of required features. See
      
       EventConfig::FEATURE_* constants
     
Приклад #1 EventConfig::requireFeatures() example
<?php
$cfg = new EventConfig();
// Create event_base associated with the config
$base = new EventBase($cfg);
// Require FDS feature
if ($cfg->requireFeatures(EventConfig::FEATURE_FDS)) {
    echo "FDS feature is now required\n";
    $base = new EventBase($cfg);
    ($base->getFeatures() & EventConfig::FEATURE_FDS)
        and print "FDS - arbitrary file descriptor types, and not just sockets\n";
}
?>Поданий вище приклад виведе щось схоже на:
FDS feature is now required FDS - arbitrary file descriptor types, and not just sockets
