public static function Html::cleanCssIdentifier in Zircon Profile 8

Same name and namespace in other branches

8.0 core/lib/Drupal/Component/Utility/Html.php \Drupal\Component\Utility\Html::cleanCssIdentifier()

Prepares a string for use as a CSS identifier (element, class, or ID name).

http://www.w3.org/TR/CSS21/syndata.html#characters shows the syntax for valid CSS identifiers (including element names, classes, and IDs in selectors.)

Parameters

string $identifier: The identifier to clean.

array $filter: An array of string replacements to use on the identifier.

Return value

string The cleaned identifier.

17 calls to Html::cleanCssIdentifier()

ExposedFormTest::getExpectedExposedFormId in core/modules/views/src/Tests/Plugin/ExposedFormTest.php: Returns a views exposed form ID.
FieldPluginBase::elementClasses in core/modules/views/src/Plugin/views/field/FieldPluginBase.php: Returns the class of the field.
FieldPluginBase::elementLabelClasses in core/modules/views/src/Plugin/views/field/FieldPluginBase.php: Returns the class of the field's label.
FieldPluginBase::elementWrapperClasses in core/modules/views/src/Plugin/views/field/FieldPluginBase.php: Returns the class of the field's wrapper.
Grid::getCustomClass in core/modules/views/src/Plugin/views/style/Grid.php: Return the token-replaced row or column classes for the specified result.

... See full list

File

core/lib/Drupal/Component/Utility/Html.php, line 78: Contains \Drupal\Component\Utility\Html.

Class

Html: Provides DOMDocument helpers for parsing and serializing HTML strings.

Namespace

Drupal\Component\Utility

Code

public static function cleanCssIdentifier($identifier, array $filter = array(
  ' ' => '-',
  '_' => '-',
  '/' => '-',
  '[' => '-',
  ']' => '',
)) {

  // We could also use strtr() here but its much slower than str_replace(). In
  // order to keep '__' to stay '__' we first replace it with a different
  // placeholder after checking that it is not defined as a filter.
  $double_underscore_replacements = 0;
  if (!isset($filter['__'])) {
    $identifier = str_replace('__', '##', $identifier, $double_underscore_replacements);
  }
  $identifier = str_replace(array_keys($filter), array_values($filter), $identifier);

  // Replace temporary placeholder '##' with '__' only if the original
  // $identifier contained '__'.
  if ($double_underscore_replacements > 0) {
    $identifier = str_replace('##', '__', $identifier);
  }

  // Valid characters in a CSS identifier are:
  // - the hyphen (U+002D)
  // - a-z (U+0030 - U+0039)
  // - A-Z (U+0041 - U+005A)
  // - the underscore (U+005F)
  // - 0-9 (U+0061 - U+007A)
  // - ISO 10646 characters U+00A1 and higher
  // We strip out any character not in the above list.
  $identifier = preg_replace('/[^\\x{002D}\\x{0030}-\\x{0039}\\x{0041}-\\x{005A}\\x{005F}\\x{0061}-\\x{007A}\\x{00A1}-\\x{FFFF}]/u', '', $identifier);

  // Identifiers cannot start with a digit, two hyphens, or a hyphen followed by a digit.
  $identifier = preg_replace(array(
    '/^[0-9]/',
    '/^(-[0-9])|^(--)/',
  ), array(
    '_',
    '__',
  ), $identifier);
  return $identifier;
}

You are here