PHP NestedArray::keyExists方法代碼示例

 /**
  * {@inheritdoc}
  */
 public function getSetting($name)
 {
     if (is_array($name)) {
         if (NestedArray::keyExists($this->settings, $name)) {
             return NestedArray::getValue($this->settings, $name);
         } elseif ($plugin = $this->getPlugin()) {
             $defaults = $plugin->defaultSettings();
             return NestedArray::getValue($defaults, $name);
         }
     } else {
         if (isset($this->settings[$name])) {
             return $this->settings[$name];
         } elseif ($plugin = $this->getPlugin()) {
             $defaults = $plugin->defaultSettings();
             if (isset($defaults[$name])) {
                 return $defaults[$name];
             }
         }
     }
 }

//.........這裏部分代碼省略.........
     // not be processed. Forms that set #disabled=TRUE on an element do not
     // expect input for the element, and even forms submitted with
     // self::submitForm() must not be able to get around this. Forms that set
     // #access=FALSE on an element usually allow access for some users, so forms
     // submitted with self::submitForm() may bypass access restriction and be
     // treated as high-privilege users instead.
     $process_input = empty($element['#disabled']) && ($form_state->isProgrammed() && $form_state->isBypassingProgrammedAccessChecks() || $form_state->isProcessingInput() && (!isset($element['#access']) || $element['#access']));
     // Set the element's #value property.
     if (!isset($element['#value']) && !array_key_exists('#value', $element)) {
         // @todo Once all elements are converted to plugins in
         //   https://www.drupal.org/node/2311393, rely on
         //   $element['#value_callback'] directly.
         $value_callable = !empty($element['#value_callback']) ? $element['#value_callback'] : 'form_type_' . $element['#type'] . '_value';
         if (!is_callable($value_callable)) {
             $value_callable = '\\Drupal\\Core\\Render\\Element\\FormElement::valueCallback';
         }
         if ($process_input) {
             // Get the input for the current element. NULL values in the input need
             // to be explicitly distinguished from missing input. (see below)
             $input_exists = NULL;
             $input = NestedArray::getValue($form_state->getUserInput(), $element['#parents'], $input_exists);
             // For browser-submitted forms, the submitted values do not contain
             // values for certain elements (empty multiple select, unchecked
             // checkbox). During initial form processing, we add explicit NULL
             // values for such elements in FormState::$input. When rebuilding the
             // form, we can distinguish elements having NULL input from elements
             // that were not part of the initially submitted form and can therefore
             // use default values for the latter, if required. Programmatically
             // submitted forms can submit explicit NULL values when calling
             // self::submitForm() so we do not modify FormState::$input for them.
             if (!$input_exists && !$form_state->isRebuilding() && !$form_state->isProgrammed()) {
                 // Add the necessary parent keys to FormState::$input and sets the
                 // element's input value to NULL.
                 NestedArray::setValue($form_state->getUserInput(), $element['#parents'], NULL);
                 $input_exists = TRUE;
             }
             // If we have input for the current element, assign it to the #value
             // property, optionally filtered through $value_callback.
             if ($input_exists) {
                 // Skip all value callbacks except safe ones like text if the CSRF
                 // token was invalid.
                 if (!$form_state->hasInvalidToken() || $this->valueCallableIsSafe($value_callable)) {
                     $element['#value'] = call_user_func_array($value_callable, array(&$element, $input, &$form_state));
                 } else {
                     $input = NULL;
                 }
                 if (!isset($element['#value']) && isset($input)) {
                     $element['#value'] = $input;
                 }
             }
             // Mark all posted values for validation.
             if (isset($element['#value']) || !empty($element['#required'])) {
                 $element['#needs_validation'] = TRUE;
             }
         }
         // Load defaults.
         if (!isset($element['#value'])) {
             // Call #type_value without a second argument to request default_value
             // handling.
             $element['#value'] = call_user_func_array($value_callable, array(&$element, FALSE, &$form_state));
             // Final catch. If we haven't set a value yet, use the explicit default
             // value. Avoid image buttons (which come with garbage value), so we
             // only get value for the button actually clicked.
             if (!isset($element['#value']) && empty($element['#has_garbage_value'])) {
                 $element['#value'] = isset($element['#default_value']) ? $element['#default_value'] : '';
             }
         }
     }
     // Determine which element (if any) triggered the submission of the form and
     // keep track of all the clickable buttons in the form for
     // \Drupal\Core\Form\FormState::cleanValues(). Enforce the same input
     // processing restrictions as above.
     if ($process_input) {
         // Detect if the element triggered the submission via Ajax.
         if ($this->elementTriggeredScriptedSubmission($element, $form_state)) {
             $form_state->setTriggeringElement($element);
         }
         // If the form was submitted by the browser rather than via Ajax, then it
         // can only have been triggered by a button, and we need to determine
         // which button within the constraints of how browsers provide this
         // information.
         if (!empty($element['#is_button'])) {
             // All buttons in the form need to be tracked for
             // \Drupal\Core\Form\FormState::cleanValues() and for the
             // self::doBuildForm() code that handles a form submission containing no
             // button information in \Drupal::request()->request.
             $buttons = $form_state->getButtons();
             $buttons[] = $element;
             $form_state->setButtons($buttons);
             if ($this->buttonWasClicked($element, $form_state)) {
                 $form_state->setTriggeringElement($element);
             }
         }
     }
     // Set the element's value in $form_state->getValues(), but only, if its key
     // does not exist yet (a #value_callback may have already populated it).
     if (!NestedArray::keyExists($form_state->getValues(), $element['#parents'])) {
         $form_state->setValueForElement($element, $element['#value']);
     }
 }

 /**
  * Tests if destination property exists.
  *
  * @param array|string $property
  *   An array of properties on the destination.
  *
  * @return bool
  *   TRUE if the destination property exists.
  */
 public function hasDestinationProperty($property)
 {
     return NestedArray::keyExists($this->destination, explode(static::PROPERTY_SEPARATOR, $property));
 }

 /**
  * Handles validation errors for forms with limited validation.
  *
  * If validation errors are limited then remove any non validated form values,
  * so that only values that passed validation are left for submit callbacks.
  *
  * @param array $form
  *   An associative array containing the structure of the form.
  * @param \Drupal\Core\Form\FormStateInterface $form_state
  *   The current state of the form.
  * @param string $form_id
  *   The unique string identifying the form.
  */
 protected function handleErrorsWithLimitedValidation(&$form, FormStateInterface &$form_state, $form_id)
 {
     // If validation errors are limited then remove any non validated form values,
     // so that only values that passed validation are left for submit callbacks.
     $triggering_element = $form_state->getTriggeringElement();
     if (isset($triggering_element['#limit_validation_errors']) && $triggering_element['#limit_validation_errors'] !== FALSE) {
         $values = array();
         foreach ($triggering_element['#limit_validation_errors'] as $section) {
             // If the section exists within $form_state->getValues(), even if the
             // value is NULL, copy it to $values.
             $section_exists = NULL;
             $value = NestedArray::getValue($form_state->getValues(), $section, $section_exists);
             if ($section_exists) {
                 NestedArray::setValue($values, $section, $value);
             }
         }
         // A button's #value does not require validation, so for convenience we
         // allow the value of the clicked button to be retained in its normal
         // $form_state->getValues() locations, even if these locations are not
         // included in #limit_validation_errors.
         if (!empty($triggering_element['#is_button'])) {
             $button_value = $triggering_element['#value'];
             // Like all input controls, the button value may be in the location
             // dictated by #parents. If it is, copy it to $values, but do not
             // override what may already be in $values.
             $parents = $triggering_element['#parents'];
             if (!NestedArray::keyExists($values, $parents) && NestedArray::getValue($form_state->getValues(), $parents) === $button_value) {
                 NestedArray::setValue($values, $parents, $button_value);
             }
             // Additionally, self::doBuildForm() places the button value in
             // $form_state->getValue(BUTTON_NAME). If it's still there, after
             // validation handlers have run, copy it to $values, but do not override
             // what may already be in $values.
             $name = $triggering_element['#name'];
             if (!isset($values[$name]) && $form_state->getValue($name) === $button_value) {
                 $values[$name] = $button_value;
             }
         }
         $form_state->setValues($values);
     }
 }

 /**
  * Tests existence of array key.
  */
 public function testKeyExists()
 {
     // Verify that existing key is found.
     $this->assertTrue(NestedArray::keyExists($this->form, $this->parents), 'Nested key found.');
     // Verify that non-existing keys are not found.
     $parents = $this->parents;
     $parents[] = 'foo';
     $this->assertFalse(NestedArray::keyExists($this->form, $parents), 'Non-existing nested key not found.');
 }

 public function has($property)
 {
     return NestedArray::keyExists($this->data, $this->toKey($property));
 }