numerically named member variables and objects

As far as I was aware, member variable and object names had to start with a non integer chracter, however I am utilising a JSON lib which is providing me with the following resultset. As you can see a member class member is numerically named and I am unable to address it in the usual way. Is there a way around this? Here's a snippet from a print_r() of the object

            [highlighting] => stdClass Object
                (
                    [000012192] => stdClass Object
                        (
                            [t_text] => Array
                                (
                                    [0] =>
                [advert]
                PRIORY PRESS LIMITED

THE FRIARY - <em>CARDIFF</em> TELEPHONE 3578

                                )

                        )

                    [000012193] => stdClass Object
                        (
                            [t_text] => Array
                                (
                                    [0] =>  Religion.

Low Performing Fees THE BOOK - 1/6 From the Publishers― PRIORY PRESS LIMITED The Friary - <em>Cardiff</em>

                                )

                        )

echo $this->results->highlighting->000012192->t_text[0]; results in [Wed Mar 11 11:32:57 2009] [error] [client xx.xx.xx.xx] PHP Parse error: syntax error, unexpected T_LNUMBER, expecting T_STRING or T_VARIABLE or '{' or '$' in /var/www/ccymod/application/views/scripts/browse/search.phtml on line 62 I'm stumped. Any ideas? -- Dan Field <dof@llgc.org.uk> Ffôn/Tel. +44 1970 632 582 Peiriannydd Meddalwedd Senior Software Engineer Llyfrgell Genedlaethol Cymru National Library of Wales