DiDom\Element::first PHP Method

Element Class Documentation Usage Examples Of DiDom\Element::first 显示文件 Open project: imangazaliev/didom

first() public method

Searches for an node in the DOM tree and returns first element or null.

public first ( string $expression, string $type = Query::TYPE_CSS, boolean $wrapElement = true ) : Element \| DOMElement \| null
$expression	string	XPath expression or a CSS selector
$type	string	The type of the expression
$wrapElement	boolean	Returns \DiDom\Element if true, otherwise \DOMElement
return	Element \| DOMElement \| null

    public function first($expression, $type = Query::TYPE_CSS, $wrapElement = true)
    {
        return $this->toDocument()->first($expression, $type, $wrapElement);
    }

Usage Example

示例#1

显示文件

文件： ElementTest.php 项目： imangazaliev/didom

 public function testFirst()
 {
     $html = '<ul><li>One</li><li>Two</li><li>Three</li></ul>';
     $document = new Document($html, false);
     $list = $document->first('ul');
     $item = $list->getNode()->childNodes->item(0);
     $this->assertEquals($item, $list->first('li')->getNode());
     $list = new Element('ul');
     $this->assertNull($list->first('li'));
 }

Element

__construct

__get

__invoke

__isset

__set

__toString

__unset

appendChild

attr

attributes

child