criar xml - Versão de Impressão

Código PHP:
$turma = array(
               
                // cada aluno destingue-se pelo número de processo (chave)
                // e tem um array de disciplinas para fazer....
                '12121010' => array(
       
                                    // cada disciplina tem um array de módulos ou períodos...
                                    // com a respectiva nota
                                    'PSI' => array(
                                                    'nome' => 'Programação de Sistemas de Incêndio',
                                                    'modulos' = array(
                                                                        'M17-C'=> 'm)',
                                                                        'M14'=> '10',
                                                                        'M15'=> '10'
                                                                     )
                                                 ),
                                   
                                    'Por' => array(
                                                    'nome' => 'Português',
                                                    'modulos' = array(
                                                                        'M1'=> 'm)',
                                                                        'M2'=> '10',
                                                                        'M3'=> '10'
                                                                     )
                                                 ),

                                   ),
                '141511210' => array( ... )
              );