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PHP | DOMElement removeAttribute() Function

  • Last Updated : 26 Feb, 2020

The DOMElement::removeAttribute() function is an inbuilt function in PHP which is used to remove a attribute with specific name from the element.

Syntax:

bool DOMElement::removeAttribute( string $name )

Parameters: This function accepts a single parameter $name which holds the name of the attribute.

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.



Below examples illustrate the DOMElement::removeAttribute() function in PHP:

Example 1:




<?php
  
// Create a new DOMDocument
$dom = new DOMDocument();
  
// Load the XML
$dom->loadXML("<?xml version=\"1.0\"?>
<root>
    <html>
        <h1 id=\"my_id\"> Geeksforgeeks </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;
  
// Remove the id attribute
$node->removeAttribute('id');
  
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 value means attribute is removed

Example 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\"> 
            Geeksforgeeks 
        </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 count
$attributeCount = $node->attributes->count();
echo 'No of attributes => ' . $attributeCount;
   
// Remove the id attribute
$node->removeAttribute('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 => 3
After the removal of attributes:
No of attributes => 2

Reference: https://www.php.net/manual/en/domelement.removeattribute.php




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