HttpMessage::fromEnv Create HttpMessage from environment &reftitle.description; static public HttpMessageHttpMessage::fromEnv intmessage_type stringclass_name"HttpMessage" Create an HttpMessage object from script environment. &reftitle.parameters; message_type The message type. See HttpMessage type constants. class_name a class extending HttpMessage &reftitle.returnvalues; Returns an HttpMessage object on success or NULL on failure. &reftitle.seealso; HttpMessage::factory.