Question

官方文档说DOMElement继承了方法cloneNode http://php.net/manual/en/class.domelement.php。如果我尝试克隆，它不起作用。如何将元素从一个DOMDocument复制到另一个DOMDocument？也就是说，我的头部错位，因此我以某种方式复制头部和身体，而不是以正确的顺序回应它们。

ob_start();
$viewData = $this->data; 
include_once( $this->viewTemplPath.$this->file );
$buffer = ob_get_clean();
$doc = new \DOMDocument();
$doc->loadHTML($buffer);

$head = $doc->getElementsByTagName('head')->item(0);
print_r('<br><br> 184 view.php head='); var_dump($head); 

$body = $doc->getElementsByTagName('body')->item(0);
print_r('<br><br> 188 view.php body='); var_dump($body); 

$docNew = new \DOMDocument();
$headNew = $head->cloneNone(true); // Fatal error: Call to undefined method DOMElement::cloneNone()
$docNew->appendChild($headNew);
$bodyNew = $body->cloneNone(true); // Fatal error: Call to undefined method DOMElement::cloneNone()
$docNew->appendChild($bodyNew);

echo $docNew->saveHTML();

Answer 1

为了克隆元素，解决方案是将要克隆的元素导入到Document中，然后将其作为子元素添加：http://php.net/manual/en/domdocument.importnode.php 这不是通过错误，而是回应新文档。但这并不能解决头部错位的问题。

ob_start();
$viewData = $this->data; 
include_once( $this->viewTemplPath.$this->file );
$buffer = ob_get_clean();
$doc = new \DOMDocument();
$doc->loadHTML($buffer);
$head = $doc->getElementsByTagName('head')->item(0);
$body = $doc->getElementsByTagName('body')->item(0);

$docNew = new \DOMDocument();
$headNew = $docNew->importNode($head, true); 
$docNew->appendChild($headNew);
$bodyNew = $docNew->importNode($body, true); 
$docNew->appendChild($bodyNew);

echo $docNew->saveHTML();

php，如何克隆DOMElement？

1 个答案: