The DOMElement::removeAttributeNS() function is an inbuilt function in PHP which is used to remove the attribute with a specific local name in a specific namespace from the element.
Syntax:
bool DOMElement::removeAttributeNS( string $namespaceURI, string $localName )
Parameters: This function accepts two parameters as mentioned above and described below:
- $namespaceURI: It specifies the namespace URI.
- $localName: It specifies the local name.
Return Value: This function returns TRUE on success or FALSE on failure.
Exceptions: This function throws DOM_NO_MODIFICATION_ALLOWED_ERR when the node is read-only.
Below examples illustrate the DOMElement::removeAttributeNS() function in PHP:
Example 1:
<?php // Create a new DOMDocument $dom = new DOMDocument();
// Load the XML $dom ->loadXML("<?xml version=\"1.0\"?>
<root> <html xmlns:x=\"my_namespace\">
<x:h1 x:id=\"my_id\"> Geeksforgeeks </x:h1>
<x:h2> Second heading </x:h2>
</html>
<html xmlns:y=\"another_namespace\">
<y:h1 id=\"my_new_id\"> Random text </y:h1>
<y:h2> Another heading </y:h2>
</html>
</root>"); // Get the elements $nodes = $dom ->getElementsByTagName( 'h1' );
echo "Before the removal of attributes: <br>" ;
foreach ( $nodes as $node ) {
// 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 . '<br>' ;
// Remove the id attribute
$node ->removeAttributeNS( 'my_namespace' , 'id' );
} echo "<br>After the removal of attributes: <br>" ;
foreach ( $nodes as $node ) {
// 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 . '<br>' ;
} ?> |
Output:
Before the removal of attributes: id => my_id id => my_new_id After the removal of attributes: => // Empty string means attribute is removed id => my_new_id
Example 2:
<?php // Create a new DOMDocument $dom = new DOMDocument();
// Load the XML $dom ->loadXML("<?xml version=\"1.0\"?>
<root> <html xmlns:x=\"my_namespace\">
<x:h1 x:id=\"my_id\">
Geeksforgeeks
</x:h1>
<x:h2> Second heading </x:h2>
</html>
<html xmlns:y=\"another_namespace\">
<y:h1 y:id=\"my_new_id\"
y:style=\"color: blue;\">
Random text
</y:h1>
<y:h2> Another heading </y:h2>
</html>
</root>"); // Get the elements $node = $dom ->getElementsByTagName( 'h1' )[1];
echo "Before the removal of attributes: <br>" ;
// Get the attribute count $attributeCount = $node ->attributes-> count ();
echo 'No of attributes => ' . $attributeCount ;
// Remove the id attribute $node ->removeAttributeNS( 'another_namespace' , 'id' );
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 => 2 After the removal of attributes: No of attributes => 1
Reference: https://www.php.net/manual/en/domelement.removeattributens.php