HandlerManager::addInvokeHandler PHP Method

    public function addInvokeHandler($handler)
    {
        if ($handler == null) {
            return;
        }
        $this->invokeHandlers[] = $handler;
        $next = $this->defaultInvokeHandler;
        for ($i = count($this->invokeHandlers) - 1; $i >= 0; --$i) {
            $next = $this->getNextInvokeHandler($next, $this->invokeHandlers[$i]);
        }
        $this->invokeHandler = $next;
        return $this;
    }