使用 domelement 中的所有子节点更改节点值

Question

I have html code something like this:

<p><i>i_text</i>,p_text</p>

i_text ,p_text

i want change all node values in this domelement and keep all tags

i_changed_text ,p_changed_text

my attempts)

$html = '<p><i>i_text</i> p_text</p>';

$dom = new DOMDocument();
$dom->loadHTML($html);
$dom->preserveWhiteSpace = false;
$dom->validateOnParse = true;
$elements = $dom->getElementsByTagName('*');
foreach ($elements as $element) {
        $element->nodeValue = str_replace('_','_changed_',$element->nodeValue);
}
echo($dom->saveHTML());

output

i_changed_text,p_changed_text

this code return correct text but don't save childnodes

$html = '<p><i>i_text</i>,p_text</p>'; $dom = new DOMDocument(); $dom->loadXML($html); $dom->preserveWhiteSpace = false; $dom->validateOnParse = true; $elements = $dom->getElementsByTagName('*'); $elem = $dom->createElement('dfn', 'tag'); $attr = $dom->createAttribute('text'); $attr->value = 'element'; $elem->appendChild($attr); $elements = $dom->getElementsByTagName('*'); foreach ($elements as $element) { while ($element->hasChildnodes()) { $element = $element->childNodes->item(0); } $changed_value = str_replace('_','_changed_',$element->nodeValue); $element->nodeValue = str_replace("tag", $dom->saveXML($elem), $changed_value); } echo ($dom->saveXML());

output

i_changed_text ,p_text

this code save and change values in childnodes but don't change text in parentnode

Answer 1

my solution)

i_text ,p_text ,another one_text

$html = '<p><i>i_text</i>,p_text<b>,a_text</b>,another one_text</p>';
$dom = new DOMDocument();
$dom->loadXML($html);
$dom->preserveWhiteSpace = false;
$dom->validateOnParse = true;
$elements = $dom->getElementsByTagName('*');

foreach ($elements as $element) {
    if($element->hasChildnodes()==true && $element->parentNode->nodeName == '#document'){
        foreach($element->childNodes as $element_child){
            $element_child->nodeValue = str_replace('_','_changed_', $element_child->nodeValue);
        }
    }
}
echo ($dom->saveXML());

output

i_changed_text ,p_changed_text ,another one_changed_text