PHP | DOMElement removeAttribute()函数

DOMElement::removeAttribute()函数是PHP中的一个内置函数，用于从元素中删除具有特定名称的属性。

句法：

bool DOMElement::removeAttribute( string $name )

参数：此函数接受一个参数$name ，它包含属性的名称。

返回值：此函数在成功时返回 TRUE，在失败时返回 FALSE。

例外：如果节点是只读的，此函数会抛出 DOM_NO_MODIFICATION_ALLOWED_ERR。

下面的例子说明了PHP中的DOMElement::removeAttribute()函数：

示例 1：

loadXML("

    
        
 Geeksforgeeks 
        
 Second heading 
    
");
  
// Get the elements
$node = $dom->getElementsByTagName('h1')[0];
  
echo "Before the removal of attributes: 
";
  
// 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 "
After the removal of attributes: 
";
  
// 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;
?>

输出：

Before the removal of attributes:
id => my_id
After the removal of attributes:
=> // Empty value means attribute is removed

示例 2：

loadXML("

    
        
 
            Geeksforgeeks 
        
        
 Second heading 
    
");
   
// Get the elements
$node = $dom->getElementsByTagName('h1')[0];
   
echo "Before the removal of attributes: 
";
   
// Get the attribute count
$attributeCount = $node->attributes->count();
echo 'No of attributes => ' . $attributeCount;
   
// Remove the id attribute
$node->removeAttribute('id');
   
echo "
After the removal of attributes: 
";
   
// Get the attribute count
$attributeCount = $node->attributes->count();
echo 'No of attributes => ' . $attributeCount;
?>

输出：

Before the removal of attributes:
No of attributes => 3
After the removal of attributes:
No of attributes => 2

参考： https://www. PHP.net/manual/en/domelement.removeattribute。 PHP