lib/Beberlei/AzureBlobStorage/SharedAccessSignature.php
public function signRequestHeaders(
		$httpVerb = 'GET',
		$path = '/',
		$query = array(),
		$headers = null,
		$forTableStorage = false,
		$resourceType = Storage::RESOURCE_UNKNOWN,
		$requiredPermission = CredentialsAbstract::PERMISSION_READ,
		$rawData = null
	) {
	    return $headers;
	}
public function signRequestHeaders(
		$httpVerb = 'GET',
		$path = '/',
		$query = array(),
		$headers = null,
		$forTableStorage = false,
		$resourceType = Storage::RESOURCE_UNKNOWN,
		$requiredPermission = CredentialsAbstract::PERMISSION_READ,
		$rawData = null
	) {
	    return $headers;
	}
Sign request with credentials

@param string $httpVerb HTTP verb the request will use
@param string $path Path for the request
@param array $query Query arguments for the request (key/value pairs)
@param array $headers x-ms headers to add
@param boolean $forTableStorage Is the request for table storage?
@param string $resourceType Resource type
@param string $requiredPermission Required permission
@param mixed  $rawData Raw post data
@return array Array of headers