has() public method

Checks the existence of the node.
public has ( string $expression, string $type = Query::TYPE_CSS ) : boolean
$expression string XPath expression or CSS selector
$type string The type of the expression
return boolean
Example #1
0
 public function testHas()
 {
     $html = $this->loadFixture('posts.html');
     $document = new Document($html, false);
     $this->assertTrue($document->has('.posts'));
     $this->assertFalse($document->has('.fake'));
 }
Example #2
0
 /**
  * Checks that the node matches selector.
  * 
  * @param string $selector CSS selector
  * @param bool $strict
  *
  * @return bool
  */
 public function matches($selector, $strict = false)
 {
     if (!$strict) {
         // remove child nodes
         $node = $this->node->cloneNode();
         if (!$this->node instanceof \DOMElement) {
             throw new LogicException('Node must be an instance of DOMElement');
         }
         $innerHtml = $node->ownerDocument->saveXml($node, LIBXML_NOEMPTYTAG);
         $html = "<root>{$innerHtml}</root>";
         $selector = 'root > ' . trim($selector);
         $document = new Document($html);
         return $document->has($selector);
     }
     $segments = Query::getSegments($selector);
     if (!array_key_exists('tag', $segments)) {
         throw new RuntimeException(sprintf('Tag name must be specified in %s', $selector));
     }
     if ($segments['tag'] !== $this->tag and $segments['tag'] !== '*') {
         return false;
     }
     $segments['id'] = array_key_exists('id', $segments) ? $segments['id'] : null;
     if ($segments['id'] !== $this->getAttribute('id')) {
         return false;
     }
     $classes = $this->hasAttribute('class') ? explode(' ', trim($this->getAttribute('class'))) : [];
     $segments['classes'] = array_key_exists('classes', $segments) ? $segments['classes'] : [];
     $diff1 = array_diff($segments['classes'], $classes);
     $diff2 = array_diff($classes, $segments['classes']);
     if (count($diff1) > 0 or count($diff2) > 0) {
         return false;
     }
     $attributes = $this->attributes();
     unset($attributes['id']);
     unset($attributes['class']);
     $segments['attributes'] = array_key_exists('attributes', $segments) ? $segments['attributes'] : [];
     $diff1 = array_diff_assoc($segments['attributes'], $attributes);
     $diff2 = array_diff_assoc($attributes, $segments['attributes']);
     if (count($diff1) > 0 or count($diff2) > 0) {
         return false;
     }
     return true;
 }