public function QueryArgsCacheContext::getContext in Zircon Profile 8

Same name and namespace in other branches

1. 8.0 core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php \Drupal\Core\Cache\Context\QueryArgsCacheContext::getContext()

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.

Throws

\LogicException Thrown if the passed in parameter is invalid.

Overrides CalculatedCacheContextInterface::getContext

File

core/lib/Drupal/Core/Cache/Context/QueryArgsCacheContext.php, line 31

Contains \Drupal\Core\Cache\Context\QueryArgsCacheContext.

Class

QueryArgsCacheContext

Defines the QueryArgsCacheContext service, for "per query args" caching.

Namespace

Drupal\Core\Cache\Context

Code

public function getContext($query_arg = NULL) {
  if ($query_arg === NULL) {
    return $this->requestStack
      ->getCurrentRequest()
      ->getQueryString();
  }
  else {
    return $this->requestStack
      ->getCurrentRequest()->query
      ->get($query_arg);
  }
}