Domdocument AppendChid

Question

我正在使用这个例程：

    $dom = new DomDocument();
    @$dom->loadHTML('<?xml encoding="UTF-8">' . $row['body']);
    $xpath = new DOMXPath($dom);
    $as = $dom->getElementsBytagName('a');
    //if anchor exists
    if($as->length)
    {
        foreach ($as as $a)
        {
            //get parrent af anchor 
            $a_parent = $a->parentNode;
            //create h4 element
            $h4 = $dom->createElement('h4');
            //append a to h4
            $h4->appendChild($a);
            //append h4 to anchor parent
            $a_parent->appendChild($h4);    
        }
        $body = $dom->saveHTML();

要查找html字符串中的所有a标记，请执行以下操作：

<p>Lorem Ipsum is simply dummy text of the printing and 
typesetting<a href="#">foo</a> industry.</p>

并用h4标签包装a标签。当我执行myscript时，结果是错误的，输出是：

<p>Lorem Ipsum is simply dummy text of the printing and
typesetting industry.<h4><a href="#">foo</a></h4></p>

但我想要这样的格式：

<p>Lorem Ipsum is simply dummy text of the printing
and typesetting<h4><a href="#">foo</a></h4> industry.</p>

有什么建议请提出来。

Answer 1

您是否尝试过使用replaceChild()？在这里，您的代码被修改了。无法尝试，但应该可以工作。

   $dom = new DomDocument();
    @$dom->loadHTML('<?xml encoding="UTF-8">' . $row['body']);
    $xpath = new DOMXPath($dom);
    $as = $dom->getElementsBytagName('a');
    //if anchor exists
    if($as->length)
    {
        foreach ($as as $a)
        {
            //get parrent af anchor 
            $a_parent = $a->parentNode;
            //create h4 element
            $h4 = $dom->createElement('h4');
            //append a to h4
            $clone = $a->cloneNode();
            $h4->appendChild($clone);
            //append h4 to anchor parent
            $a_parent->replaceChild($h4, $a);
        }
        $body = $dom->saveHTML();