Is it possible to delete element from loaded DOM without creating a new one? For example something like this:
$dom = new DOMDocument('1.0', 'utf-8');
$dom->loadHTML($html);
foreach($dom->getElementsByTagName('a') as $href)
if($href->nodeValue == 'First')
//delete
You remove the node by telling the parent node to remove the child:
$href->parentNode->removeChild($href);
See DOMNode::$parentNodeDocs and DOMNode::removeChild()Docs.
See as well:
How to remove attributes using PHP DOMDocument?
How to remove an HTML element using the DOMDocument class
This took me a while to figure out, so here's some clarification:
If you're deleting elements from within a loop (as in the OP's example), you need to loop backwards
$elements = $completePage->getElementsByTagName('a');
for ($i = $elements->length; --$i >= 0; ) {
$href = $elements->item($i);
$href->parentNode->removeChild($href);
}
DOMNodeList documentation: You can modify, and even delete, nodes from a DOMNodeList if you iterate backwards
Easily:
$href->parentNode->removeChild($href);
I know this has already been answered but I wanted to add to it.
In case someone faces the same problem I have faced.
Looping through the domnode list and removing items directly can cause issues.
I just read this and based on that I created a method in my own code base which works:https://www.php.net/manual/en/domnode.removechild.php
Here is what I would do:
$links = $dom->getElementsByTagName('a');
$links_to_remove = [];
foreach($links as $link){
$links_to_remove[] = $link;
}
foreach($links_to_remove as $link){
$link->parentNode->removeChild($link);
}
$dom->saveHTML();
for remove tag or somthing.
removeChild($element->id());
full example:
$dom = new Dom;
$dom->loadFromUrl('URL');
$html = $dom->find('main')[0];
$html2 = $html->find('p')[0];
$span = $html2->find('span')[0];
$html2->removeChild($span->id());
echo $html2;
Related
I am using DomDocument to pull content from a specific div on a page.
I would then like to replace all instances of links with a path equal to http://example.com/test/ with http://example.com/test.php.
$url = "http://pugetsoundbasketball.com/stackoverflow_sample.php";
$doc = new DomDocument('1.0', 'UTF-8');
$doc->loadHtml(file_get_contents($url));
$div = $doc->getElementById('upcoming_league_dates');
foreach ($div->getElementsByTagName('a') as $item) {
$item->setAttribute('href', 'http://example.com/test.php');
}
echo $doc->saveHTML($div);
As you can see in the example above, str_replace causes problems after I target the upcoming_league_dates div with getElementById. I understand this but unfortunately I don't know where to go from here!
I've tried several different ways including executing the str_replace above the getElementById function (I figured I could replace the strings first and then target the specific div), with no luck.
What am I missing here?
EDIT: UPDATED CODE TO SHOW WORKING SOLUTION
You can't just use str_replace on that node. You need to access it properly first. Thru the DOMElement class you can use the method ->setAttribute() and make the replacement.
Example:
$url = "http://pugetsoundbasketball.com/stackoverflow_sample.php";
$dom = new DOMDocument('1.0', 'UTF-8');
$dom->loadHTMLFile($url);
$xpath = new DOMXpath($dom); // use xpath
$needle = 'http://example.com/test/';
$replacement = 'http://example.com/test.php';
// target the link
$links = $xpath->query("//div[#id='upcoming_league_dates']/a[contains(#href, '$needle')]");
foreach($links as $anchor) {
// replacement of those href values
$anchor->setAttribute('href', $replacement);
}
echo $dom->saveHTML();
Update: After your revision, your code is now working anyway. This is just to answer your logic replacement (ala str_replace search/replace) on your previous question.
This question use PHP, but the problems and algorithms are valid for many other Libxml2 and W3C DOM implementations.
Core problem: there are no $node->replaceThisBy($otherNode). There are only "replace text" (using nodeValue property) and the replaceChild() method — not obviuos neither simple to use.
In the code below, only the second loop works, but I need copy nodes from one DOM tree (simulated by a clone) to another one.
$doc = new DOMDocument('1.0', 'UTF-8');
$doc->load($fileXML);
$xp = new DOMXpath($doc);
$lst = $xp->query("//td");
$z = clone $lst->item(2); // a big and complex node
// needs clone to freeze the node content (before change it also).
// does NOT work:
foreach ($lst as $node)
$node = $z; // no error messages!
//error: $node->parentNode->replaceChild($z,$node);
// This works though:
foreach ($lst as $node)
$node->nodeValue = $z->nodeValue;
Similar questions:
PHP DOM replace element with a new element
PHP DOMDocument question: how to replace text of a node?
nodeValue property, changes only text-value. To change all tags and contents, need a lot more instructions -- DomDocument is not friendly (!) ... Need to import a clone, and clone in the loop: solved!
$doc = new DOMDocument('1.0', 'UTF-8');
$doc->loadXML($xmlFrag);
$xp = new DOMXpath($doc);
$lst = $xp->query("//p");
$import = $doc->importNode( $lst->item(1)->cloneNode(true) , TRUE);
foreach ($lst as $node) {
$tmp = clone $import; // clone because if same, ignores loop.
$node->parentNode->replaceChild($tmp,$node);
}
print $doc->saveXML();
I'm using DOMDocument to retrieve on a HTML page a special div.
I just want to retrive the content of this div, without the div tag.
For example :
$dom = new DOMDocument;
$dom->loadHTML($webtext['content']);
$main = $dom->getElementById('inter');
$dom->saveHTML()
Here, i have the result :
<div id="inter">
//SOME THINGS IN MY DIV
</div>
And i just want to have :
//SOME THINGS IN MY DIV
Ideas ? Thanks !
I'm going to go with simple does it. You already have:
$dom = new DOMDocument;
$dom->loadHTML($webtext['content']);
$main = $dom->getElementById('inter');
$dom->saveHTML();
Now, DOMDocument::getElementById() returns one DOMElement which extends DOMNode which has the public stringnodeValue. Since you don't specify if you are expecting anything but text within that div, I'm going to assume that you want anything that may be stored in there as plain text. For that, we are going to remove $dom->saveHTML();, and instead replace it with:
$divString = $main->nodeValue;
With that, $divString will contain //SOME THINGS IN MY DIV, which, from your example, is the desired output.
If, however, you want the HTML of the inside of it and not just a String representation - replace it with the following instead:
$divString = "";
foreach($main->childNodes as $c)
$divString .= $c->ownerDocument->saveXML($c);
What that does is takes advantage of the inherited DOMNode::childNodes which contains a DOMNodeList each containing its own DOMNode (for reference, see above), and we loop through each one getting the ownerDocument which is a DOMDocument and we call the DOMDocument::saveXML() function. The reason we pass the current $c node in to the function is to prevent an entire valid document from being outputted, and because the ownerDocument is what we are looping through - we need to get one child at a time, with no children left behind. (sorry, it's late, couldn't resist.)
Now, after either option, you can do with $divString what you will. I hope this has helped explain the process to you and hopefully you walk away with a better understanding of what is going on instead of rote copying of code just because it works. ^^
you can use my custom function to remove extra div from content
$html_string = '<div id="inter">
SOME THINGS IN MY DIV
</div>';
// custom function
function DOMgetinnerHTML($element)
{
$innerHTML = "";
$children = $element->childNodes;
foreach ($children as $child)
{
$tmp_dom = new DOMDocument();
$tmp_dom->appendChild($tmp_dom->importNode($child, true));
$innerHTML.=trim($tmp_dom->saveHTML());
}
return $innerHTML;
}
your code will like
$dom = new DOMDocument;
$dom->loadHTML($html_string);
$divs = $dom->getElementsByTagName('div');
$innerHTML_contents = DOMgetinnerHTML($divs->item(0));
echo $innerHTML_contents
and your output will be
SOME THINGS IN MY DIV
you can use xpath
$xpath = new DOMXPath($xml);
foreach($xpath->query('//div[#id="inter"]/*') as $node)
{
$node->nodeValue
}
or simplu you can edit your code. see here
$main = $dom->getElementById('inter');
echo $main->nodeValue
I think this gets the first element called <gallery>
$gallery = $objDOM->getElementsByTagName('gallery')->item(0);
I'm trying to get <gallery name="Third">
I think I need something equivalent to:
$gallery = $objDOM->getElementsByTagName('gallery[#name="Third"]')->item;
Thanks, Andy
This is only possible with DOMXPath, e.g.
$xp = new DOMXPath($yourDOMDocument);
$nodes = $xp->query('//gallery[#name="Third"]');
or by iterating over the node list after the call to getElementsByTagName with
foreach ($objDOM->getElementsByTagName('gallery') as $gallery) {
if($gallery->getAttribute('name') === 'Third') {
// do something
}
}
As the name suggests getElementsByTagName() only accepts tag names. Try XPath instead
$xpath = new DOMXPath ($objDOM);
$nodeList = $xpath->query('gallery[#name="Third"]');
$gallery = $nodeList->item(0);
Dont tested it, so there may be errors, typos or something.
I am loading HTML into DOM and then querying it using XPath in PHP. My current problem is how do I find out how many matches have been made, and once that is ascertained, how do I access them?
I currently have this dirty solution:
$i = 0;
foreach($nodes as $node) {
echo $dom->savexml($nodes->item($i));
$i++;
}
Is there a cleaner solution to find the number of nodes, I have tried count(), but that does not work.
You haven't posted any code related to $nodes so I assume you are using DOMXPath and query(), or at the very least, you have a DOMNodeList.
DOMXPath::query() returns a DOMNodeList, which has a length member. You can access it via (given your code):
$nodes->length
If you just want to know the count, you can also use DOMXPath::evaluate.
Example from PHP Manual:
$doc = new DOMDocument;
$doc->load('book.xml');
$xpath = new DOMXPath($doc);
$tbody = $doc->getElementsByTagName('tbody')->item(0);
// our query is relative to the tbody node
$query = 'count(row/entry[. = "en"])';
$entries = $xpath->evaluate($query, $tbody);
echo "There are $entries english books\n";