(No version information available, might only be in SVN)
OAuth::generateSignature — Generate a signature
$http_method
   , string $url
   [, mixed $extra_parameters
  ] )Generate a signature based on the final HTTP method, URL and a string/array of parameters.
http_method
    HTTP method for request
url
    URL for request
extra_parameters
    String or array of additional parameters.
   A string containing the generated signature or FALSE on failure