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   // Create a new DOMDocument $dom = new DOMDocument();   // Load the XML $dom->loadXML("<?xml version=\"1.0\"?> <root>     <html>         <h1 id=\"my_id\"> Geeksforneveropen </h1>         <h2> Second heading </h2>     </html> </root>");   // Get the elements $node = $dom->getElementsByTagName('h1')[0];   echo "Before the removal of attributes: <br>";   // Get the attribute name and value $attribute = $node->attributes->item(0); $attribute_name = $attribute->name; $attribute_value = $attribute->value;   echo $attribute_name . ' => '; echo $attribute_value;   // Get the attribute to remove $oldnode = $node->getAttributeNode('id');   // Remove the id attribute $node->removeAttributeNode($oldnode);   echo "<br>After the removal of attributes: <br>";   // Get the attribute name and value $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   // Create a new DOMDocument $dom = new DOMDocument();   // Load the XML $dom->loadXML("<?xml version=\"1.0\"?> <root>     <html>         <h1 id=\"my_id\" style=\"color:green;\"           class=\"my_class\"> Geeksforneveropen </h1>         <h2> Second heading </h2>     </html> </root>");   // Get the elements $node = $dom->getElementsByTagName('h1')[0];   echo "Before the removal of attributes: <br>";   // Get the attribute to remove $oldnode = $node->getAttributeNode('id');   // Get the attribute count $attributeCount = $node->attributes->count(); echo 'No of attributes => ' . $attributeCount;   // Remove the id attribute $node->removeAttributeNode($oldnode);   echo "<br>After the removal of attributes: <br>";   // Get the attribute count $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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