(PECL pecl_http >= 0.23.0)
http_build_str — Build query string
$query
   [, string $prefix
   [, string $arg_separator = ini_get("arg_separator.output")
  ]] )Builds a query string from an array of query variables. In effect, this function is the opposite of parse_str().
query
     associative array of query string parameters
prefix
     top level prefix
arg_separator
     argument separator to use (by default the INI setting arg_separator.output will be used, or "&" if neither is set
   Returns the built query as string on success or FALSE on failure.