DOMDocument::saveXML 返回值为空字符串
PHP手册中的的实例：
<br> $doc = new DOMDocument('1.0');<br> // we want a nice output<br> $doc->formatOutput = true;<br><br> $root = $doc->createElement('book');<br> $root = $doc->appendChild($root);<br><br> $title = $doc->createElement('title');<br> $title = $root->appendChild($title);<br><br> $text = $doc->createTextNode('This is the title');<br> $text = $title->appendChild($text);<br><br> <br> echo "Saving all the document:\n";<br> <br> $xmlContent = $doc->saveXML();<br> <br> var_dump($xmlContent);<br>打印出的结果是：
saving all the document: string(72) " "
为什么没有打印出完整的xml？请各位前辈指点，thanks!
PHP saveXML
