ezcWorkflowDefinitionStorageXml::saveToDocument PHP Method

    public function saveToDocument(ezcWorkflow $workflow, $workflowVersion)
    {
        $document = new DOMDocument('1.0', 'UTF-8');
        $document->formatOutput = true;
        $root = $document->createElement('workflow');
        $document->appendChild($root);
        $root->setAttribute('name', $workflow->name);
        $root->setAttribute('version', $workflowVersion);
        $nodes = $workflow->nodes;
        $numNodes = count($nodes);
        // Workaround for foreach() bug in PHP 5.2.1.
        // http://bugs.php.net/bug.php?id=40608
        $keys = array_keys($nodes);
        for ($i = 0; $i < $numNodes; $i++) {
            $id = $keys[$i];
            $node = $nodes[$id];
            $nodeClass = get_class($node);
            $xmlNode = $document->createElement('node');
            $xmlNode->setAttribute('id', $id);
            $xmlNode->setAttribute('type', str_replace('ezcWorkflowNode', '', get_class($node)));
            $node->configurationtoXML($xmlNode);
            $root->appendChild($xmlNode);
            $outNodes = $node->getOutNodes();
            $_keys = array_keys($outNodes);
            $numOutNodes = count($_keys);
            for ($j = 0; $j < $numOutNodes; $j++) {
                foreach ($nodes as $outNodeId => $_node) {
                    if ($_node === $outNodes[$_keys[$j]]) {
                        break;
                    }
                }
                $xmlOutNode = $document->createElement('outNode');
                $xmlOutNode->setAttribute('id', $outNodeId);
                if (is_subclass_of($nodeClass, 'ezcWorkflowNodeConditionalBranch') && ($condition = $node->getCondition($outNodes[$_keys[$j]]))) {
                    if (!$node->isElse($outNodes[$_keys[$j]])) {
                        $xmlCondition = self::conditionToXml($condition, $document);
                        $xmlCondition->appendChild($xmlOutNode);
                        $xmlNode->appendChild($xmlCondition);
                    } else {
                        $xmlElse = $xmlCondition->appendChild($document->createElement('else'));
                        $xmlElse->appendChild($xmlOutNode);
                    }
                } else {
                    $xmlNode->appendChild($xmlOutNode);
                }
            }
        }
        foreach ($workflow->getVariableHandlers() as $variable => $class) {
            $variableHandler = $root->appendChild($document->createElement('variableHandler'));
            $variableHandler->setAttribute('variable', $variable);
            $variableHandler->setAttribute('class', $class);
        }
        return $document;
    }