PHP Using DOMXPath to strip tags and remove nodes
Question
I am trying to work with DOMDocument but I am encountering some problems. I have a string like this:
Some Content to keep
<span class="ice-cts-1 ice-del" data-changedata="" data-cid="5" data-time="1414514760583" data-userid="1" data-username="Site Administrator" undefined="Site Administrator">
This content should remain, but span around it should be stripped
</span>
Keep this content too
<span>
<span class="ice-cts-1 ice-ins" data-changedata="" data-cid="2" data-time="1414512278297" data-userid="1" data-username="Site Administrator" undefined="Site Administrator">
This whole node should be deleted
</span>
</span>
What I want to do is, if the span has a class like ice-del keep the inner content but remove the span tags. If it has ice-ins , remove the whole node.
If it is just an empty span <span></span> remove it as well. This is the code I have:
//this get the above mentioned string
$getVal = $array['body'][0][$a];
$dom = new DOMDocument;
$dom->loadHTML($getVal );
$xPath = new DOMXPath($dom);
$delNodes = $xPath->query('//span[@class="ice-cts-1 ice-del"]');
$insNodes = $xPath->query('//span[@class="ice-cts-1 ice-ins"]');
foreach($insNodes as $span){
//reject these changes, so remove whole node
$span->parentNode->removeChild($span);
}
foreach($delNodes as $span){
//accept these changes, so just strip out the tags but keep the content
}
$newString = $dom->saveHTML();
So, my code works to delete the entire span node, but how do I take a node and strip out it tags but keep its content?
Also, how would I just delete and empty span? I'm sure I could do this using regex or replace but I kind of want to do this using the dom.
thanks
2 answers
solution1
5 ACCPTED 2014-10-31 15:07:56
No, I wouldn't recommend regex, I strongly recommend build on what you have right now with the use of this beautiful HTML Parser. You could use ->replaceChild in this case:
$dom = new DOMDocument;
$dom->loadHTML($getVal);
$xPath = new DOMXPath($dom);
$spans = $xPath->query('//span');
foreach ($spans as $span) {
$class = $xPath->evaluate('string(./@class)', $span);
if(strpos($class, 'ice-ins') !== false || $class == '') {
$span->parentNode->removeChild($span);
} elseif(strpos($class, 'ice-del') !== false) {
$span->parentNode->replaceChild(new DOMText($span->nodeValue), $span);
}
}
$newString = $dom->saveHTML();
solution2
0 2018-09-22 16:10:40
More generic solution to delete any HTML tag from a DOM tree use this;
$dom = new DOMDocument;
$dom->loadHTML($getVal);
$xPath = new DOMXPath($dom);
$tagName = $xPath->query('//table'); //use what you want like div, span etc.
foreach ($tagName as $t) {
$t->parentNode->removeChild($span);
}
$newString = $dom->saveHTML();
Example html:
<html>
<head></head>
<body>
<table>
<tr><td>Hello world</td></tr>
</table>
</body>
</html>
Output after process;
<html>
<head></head>
<body></body>
</html>
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