PHP Crawler::form方法代碼示例

 /**
  * Returns a crawler Form object for the form pointed to by the
  * passed Crawler.
  *
  * The returned form is an independent Crawler created to take care
  * of the following issues currently experienced by Crawler's form
  * object:
  *  - input fields disabled at a higher level (e.g. by a surrounding
  *    fieldset) still return values
  *  - Codeception expects an empty value to match an unselected
  *    select box.
  *
  * The function clones the crawler's node and creates a new crawler
  * because it destroys or adds to the DOM for the form to achieve
  * the desired functionality.  Other functions simply querying the
  * DOM wouldn't expect them.
  *
  * @param Crawler $form the form
  * @param string $action the form's absolute URL action
  * @return Form
  */
 private function getFormFromCrawler(Crawler $form, $action)
 {
     $fakeDom = new \DOMDocument();
     $fakeDom->appendChild($fakeDom->importNode($form->getNode(0), true));
     $node = $fakeDom->documentElement;
     $cloned = new Crawler($node, $action);
     $shouldDisable = $cloned->filter('input:disabled:not([disabled]),select option:disabled,select optgroup:disabled option:not([disabled])');
     foreach ($shouldDisable as $field) {
         $field->parentNode->removeChild($field);
     }
     $selectNonMulti = $cloned->filterXPath('//select[not(@multiple) and not(option[@value=""])]');
     $opt = new \DOMElement('option');
     foreach ($selectNonMulti as $field) {
         $node = $field->insertBefore($opt, $field->firstChild);
         $node->setAttribute('value', '');
     }
     return $cloned->form();
 }

 /**
  * Returns form field from XPath query.
  *
  * @param   string  $xpath
  *
  * @return  Symfony\Component\DomCrawler\Field\FormField
  */
 private function getField($xpath)
 {
     if (!count($crawler = $this->getCrawler()->filterXPath($xpath))) {
         throw new ElementNotFoundException($this->session, 'form field', 'xpath', $xpath);
     }
     $fieldNode = $this->getCrawlerNode($crawler);
     $formNode = $fieldNode;
     do {
         // use the ancestor form element
         if (null === ($formNode = $formNode->parentNode)) {
             throw new ElementNotFoundException($this->session, 'the form field with xpath "' . $xpath . '" was found, but no form element surrounding that field could be found');
         }
     } while ('form' != $formNode->nodeName);
     // check if form already exists
     foreach ($this->forms as $form) {
         if ($formNode->getLineNo() === $form->getFormNode()->getLineNo()) {
             return $form[$fieldNode->getAttribute('name')];
         }
     }
     // find form button
     $buttonNode = $this->findFormButton($formNode);
     if (null === $buttonNode) {
         throw new ElementNotFoundException($this->session, 'form submit button for field with xpath "' . $xpath . '"');
     }
     $base = $this->client->getCrawler()->filter('base')->extract(array('href'));
     if (count($base)) {
         $base = current($base);
     } else {
         $base = NULL;
     }
     // init form
     $button = new Crawler($buttonNode, $this->client->getRequest()->getUri(), $base);
     $this->forms[] = $form = $button->form();
     return $form[$fieldNode->getAttribute('name')];
 }