PHP | DOMElement removeAttributeNode() Function
Last Updated :
05 Mar, 2020
The DOMElement::removeAttributeNode() function is an inbuilt function in PHP which is used to remove attribute from element.
Syntax:
bool DOMElement::removeAttributeNode( DOMAttr $oldnode )
Parameters: This function accepts a single parameter $oldnode which holds the attribute that to be removed.
Return Value: This function returns TRUE on success or FALSE on failure.
Exceptions: This function throws DOM_NO_MODIFICATION_ALLOWED_ERR, if the node is read-only and DOM_NOT_FOUND_ERROR if $oldnode is not a attribute of element.
Below given programs illustrate the DOMElement::removeAttributeNode() function in PHP:
Program 1:
<?php
$dom = new DOMDocument();
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
<html>
<h1 id=\"my_id\"> Geeksforgeeks </h1>
<h2> Second heading </h2>
</html>
</root>");
$node = $dom->getElementsByTagName('h1')[0];
echo "Before the removal of attributes: <br>";
$attribute = $node->attributes->item(0);
$attribute_name = $attribute->name;
$attribute_value = $attribute->value;
echo $attribute_name . ' => ';
echo $attribute_value;
$oldnode = $node->getAttributeNode('id');
$node->removeAttributeNode($oldnode);
echo "<br>After the removal of attributes: <br>";
$attribute = $node->attributes->item(0);
$attribute_name = $attribute->name . ' => ';
$attribute_value = $attribute->value;
echo $attribute_name;
echo $attribute_value;
?>
|
Output:
Before the removal of attributes:
id => my_id
After the removal of attributes:
=> // Empty string means attribute is removed
Program 2:
<?php
$dom = new DOMDocument();
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
<html>
<h1 id=\"my_id\" style=\"color:green;\"
class=\"my_class\"> Geeksforgeeks </h1>
<h2> Second heading </h2>
</html>
</root>");
$node = $dom->getElementsByTagName('h1')[0];
echo "Before the removal of attributes: <br>";
$oldnode = $node->getAttributeNode('id');
$attributeCount = $node->attributes->count();
echo 'No of attributes => ' . $attributeCount;
$node->removeAttributeNode($oldnode);
echo "<br>After the removal of attributes: <br>";
$attributeCount = $node->attributes->count();
echo 'No of attributes => ' . $attributeCount;
?>
|
Output:
Before the removal of attributes:
No of attributes => 3
After the removal of attributes:
No of attributes => 2
Reference: https://www.php.net/manual/en/domelement.removeattributenode.php
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