Structure artobj :
Array
(
    [nom_T] => TwhaOrgSel
    [contenu] => TLV
    [92] => Array
        (
            [nom_T] => T1
            [contenu] => TLV
            [2] => Array
                (
                    [nom_T] => T2
                    [contenu] => TLV
                    [1] => Array
                        (
                            [nom_T] => T3nd
                            [contenu] => V
                            [nom_V] => IDUS_NUM
                            [format] => 3
                        )

                    [2] => Array
                        (
                            [nom_T] => T3aid_bss
                            [contenu] => V
                            [nom_V] => AID
                            [format] => 3
                            [V] => Array
                                (
                                    [nom_V] => AID
                                    [format] => 3
                                )

                        )

                    [3] => Array
                        (
                            [nom_T] => T3code_prest
                            [contenu] => V
                            [nom_V] => CODPRES
                            [format] => 3
                        )

                    [4] => Array
                        (
                            [nom_T] => T3type_pres
                            [contenu] => V
                            [nom_V] => TYPPRES
                            [format] => 3
                        )

                    [5] => Array
                        (
                            [nom_T] => T3code_debcred
                            [contenu] => V
                            [nom_V] => DEBCRED
                            [format] => 3
                        )

                    [6] => Array
                        (
                            [nom_T] => T3date_pres
                            [contenu] => V
                            [nom_V] => DATE_PREST
                            [format] => 3
                        )

                    [7] => Array
                        (
                            [nom_T] => T3montant_ht
                            [contenu] => V
                            [nom_V] => MONTANTHT
                            [format] => 3
                        )

                    [8] => Array
                        (
                            [nom_T] => T3code_devise
                            [contenu] => V
                            [nom_V] => DEVISE
                            [format] => 3
                        )

                    [9] => Array
                        (
                            [nom_T] => T3heure_prest
                            [contenu] => V
                            [nom_V] => HEUREPREST
                            [format] => 3
                        )

                    [16] => Array
                        (
                            [nom_T] => T3debut_abont
                            [contenu] => V
                            [nom_V] => DEBABO
                            [format] => 3
                        )

                    [17] => Array
                        (
                            [nom_T] => T3fin_abont
                            [contenu] => V
                            [nom_V] => FINABO
                            [format] => 3
                        )

                    [18] => Array
                        (
                            [nom_T] => T3libel_compl
                            [contenu] => V
                            [nom_V] => LibComp
                            [format] => 3
                        )

                    [19] => Array
                        (
                            [nom_T] => T3serv_ip_fti
                            [contenu] => V
                            [nom_V] => SerIpFti
                            [format] => 3
                        )

                    [20] => Array
                        (
                            [nom_T] => T3timezone
                            [contenu] => V
                            [nom_V] => TimeZone
                            [format] => 3
                        )

                    [126] => Array
                        (
                            [contenu] => TLV
                            [16] => Array
                                (
                                    [nom_T] => T4date
                                    [contenu] => V
                                    [nom_V] => DATE_ASC
                                    [format] => 26
                                )

                        )

                )

        )

)

Exemple : 
$t[92][2][126][16] TLV =Array
(
    [nom_T] => T4date
    [contenu] => V
    [nom_V] => DATE_ASC
    [format] => 26
)