php - 创建具有多个属性的节点

Question

我想创建一个节点脚本并为其设置多个属性

这就是我想做的事情:

$script_insta_node = $dom->createElement('script');
$script_insta_node->setAttribute('async defer src', $instagram_js_path);

问题是我只能定义一个属性。

Answer 1

你能做的就是扩展 DOMElement (定义属性修改器方法的类)，然后将它们注册到 DOMDocument .

如果您想要更奇特一点，您也可以扩展 DOMDocument，默认情况下合并此行为，例如在您自己的命名空间 Dom 中；

Dom\Element:

namespace Dom;

class Element
  extends \DOMElement
{
  // I think something like this would make
  // a little more sense than your original example
  // that would probably set all attributes to the same value
  public function setAttributes( array $attributes ) {
    foreach( $attributes as $name => $value ) {
      $this->setAttribute( $name, $value );
    }
  }
}

Dom\文档:

namespace Dom;

class Document
  extends \DOMDocument
{
  public function __construct( $version = '1.0', $encoding = null ) {
    parent::__construct( $version, $encoding );

    // we register our custom DOMElement class
    // you can do this for all DOM classes
    // that are derivatives of DOMNode
    $this->registerNodeClass( 'DOMElement', 'Dom\Element' );
  }
}

使用示例:

$doc = new Dom\Document;
$scriptElement = $doc->createElement( 'script' );
$scriptElement->setAttributes( array(
  'defer' => '',
  'async' => '',
  'src'   => $instagram_js_path
) );