trouble in removing the meta tag using php DOM api

Question

$html = new DOMDocument();
           $html->loadHTMLFile($filename);

           $meta = $html->getElementsByTagName(\"meta\");


           foreach($meta as $old         


        

Answer 1

When you use foreach to iterate over the DOMNodeList and remove an element, you are changing the DOMNodeList content, so nodes will be skipped. You have to iterate backwards:

$nodes = $dom->getElementsByTagName('meta');
for ($i = $nodes->length - 1; $i >= 0; $i--) {
    $nodes->item($i)->parentNode->removeChild($nodes->item($i));
}

Answer 2

You're looping over the array and removing from it at the same time.

Unfortunately, this means that every time you remove a child inside the loop, the next loop iteration skips a node. foreach is not "clever enough" in conjunction with DOMDocument to do this intelligently.

Instead of foreach, use indexes:

$meta = $html->getElementsByTagName("meta");
for ($i = $meta->length - 1; $i >= 0; $i--) { // `foreach` breaks the `removeChild`
   $child = $meta->item($i);
   $child->parentNode->removeChild($child);
}