Returns the string representation of the cache context.

A cache context service's name is used as a token (placeholder) cache key, and is then replaced with the string returned by this method.

Parameters

string|null $parameter: The parameter, or NULL to indicate all possible parameter values.

Return value

string The string representation of the cache context. When $parameter is NULL, a value representing all possible parameters must be generated.

Overrides CalculatedCacheContextInterface::getContext

File

core/lib/Drupal/Core/Cache/Context/UserRolesCacheContext.php, line 29

Class

UserRolesCacheContext

Defines the UserRolesCacheContext service, for "per role" caching.

Namespace

Drupal\Core\Cache\Context

Code

public function getContext($role = NULL) {
  if ($role === NULL) {
    return implode(',', $this->user
      ->getRoles());
  }
  return in_array($role, $this->user
    ->getRoles(), TRUE) ? 'true' : 'false';
}

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