function FilterHtml::filterElementAttributes
Same name in other branches
- 9 core/modules/filter/src/Plugin/Filter/FilterHtml.php \Drupal\filter\Plugin\Filter\FilterHtml::filterElementAttributes()
- 10 core/modules/filter/src/Plugin/Filter/FilterHtml.php \Drupal\filter\Plugin\Filter\FilterHtml::filterElementAttributes()
- 11.x core/modules/filter/src/Plugin/Filter/FilterHtml.php \Drupal\filter\Plugin\Filter\FilterHtml::filterElementAttributes()
Filters attributes on an element according to a list of allowed values.
Parameters
\DOMElement $element: The element to be processed.
array $allowed_attributes: The list of allowed attributes as an array of names and values.
1 call to FilterHtml::filterElementAttributes()
- FilterHtml::filterAttributes in core/
modules/ filter/ src/ Plugin/ Filter/ FilterHtml.php - Provides filtering of tag attributes into accepted HTML.
File
-
core/
modules/ filter/ src/ Plugin/ Filter/ FilterHtml.php, line 159
Class
- FilterHtml
- Provides a filter to limit allowed HTML tags.
Namespace
Drupal\filter\Plugin\FilterCode
protected function filterElementAttributes(\DOMElement $element, array $allowed_attributes) {
$modified_attributes = [];
foreach ($element->attributes as $name => $attribute) {
// Remove attributes not in the list of allowed attributes.
$allowed_value = $this->findAllowedValue($allowed_attributes, $name);
if (empty($allowed_value)) {
$modified_attributes[$name] = FALSE;
}
elseif ($allowed_value !== TRUE) {
// Check the list of allowed attribute values.
$attribute_values = preg_split('/\\s+/', $attribute->value, -1, PREG_SPLIT_NO_EMPTY);
$modified_attributes[$name] = [];
foreach ($attribute_values as $value) {
if ($this->findAllowedValue($allowed_value, $value)) {
$modified_attributes[$name][] = $value;
}
}
}
}
// If the $allowed_value was TRUE for an attribute name, it does not
// appear in this array so the value on the DOM element is left unchanged.
foreach ($modified_attributes as $name => $values) {
if ($values) {
$element->setAttribute($name, implode(' ', $values));
}
else {
$element->removeAttribute($name);
}
}
}
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