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(PECL event >= 1.2.6-beta)
Event::setTimer — Re-configures timer event
$base 
   ,   callable  $cb 
   [,   mixed  $arg 
  ] )Re-configures timer event. Note, this function doesn't invoke obsolete libevent's event_set . It calls event_assign instead.
base The event base to associate with.
cb The timer event callback. See Event callbacks .
arg Custom data. If specified, it will be passed to the callback when event triggers.
   Returns  TRUE  on success. Otherwise  FALSE .