ezcWorkflowExecution::start PHP Method

    public function start($parentId = null)
    {
        if ($this->workflow === null) {
            throw new ezcWorkflowExecutionException('No workflow has been set up for execution.');
        }
        $this->cancelled = false;
        $this->ended = false;
        $this->resumed = false;
        $this->suspended = false;
        $this->doStart($parentId);
        $this->loadFromVariableHandlers();
        foreach ($this->plugins as $plugin) {
            $plugin->afterExecutionStarted($this);
        }
        // Start workflow execution by activating the start node.
        $this->workflow->startNode->activate($this);
        // Continue workflow execution until there are no more
        // activated nodes.
        $this->execute();
        // Return execution ID if the workflow has been suspended.
        if ($this->isSuspended()) {
            return (int) $this->id;
        }
    }