function oembed_cache_key in oEmbed 7

Helper function generates a cache key based on url and request parameters.

Parameters

$url:

array $parameters:

Return value

string

1 call to oembed_cache_key()

oembed_oembed_fetch in ./oembed.module

oEmbed fetcher and parser.

File

./oembed.module, line 260

Core functionality for oEmbed

Code

function oembed_cache_key($url, $parameters = array()) {
  $cache_keys = array();

  // Remove trailing slash to normalize URLs.
  $cache_keys[] = hash('sha256', substr($url, -1) == '/' ? substr($url, 0, -1) : $url);

  // Hash and serialize request parameters and display options.
  if (!empty($parameters)) {

    // Normalize the parameters and attributes for better cache performance.
    ksort($parameters);
    $parameters = array_filter($parameters);
    $cache_keys[] = hash('sha256', serialize($parameters));
  }
  $cache_key = implode(':', $cache_keys);
  return $cache_key;
}