php - 配列をキー値でソートし、キーを表示します

Question

私はこの配列を持っています

Array (
    [0] => Array
        (
            [id] => 61
            [testo] => articolo di maggio
            [data] => 2013-05-03
            [orario] => 00:00:00
            [nome_files] => fabmad_1920x1200.jpg
            [pubblicato] => 1
        )

    [1] => Array
        (
            [id] => 58
            [testo] => 
            [data] => 2013-06-03
            [orario] => 00:00:00
            [nome_files] => 20130603100647_da_installare.rtf
            [pubblicato] => 1
        )

    [2] => Array
        (
            [id] => 59
            [testo] => Demo
            [data] => 2013-06-03
            [orario] => 00:00:00
            [nome_files] => eye_drops_water_2.jpg
            [pubblicato] => 1
        )


)

「データ」でソートしたい。「データ」と各データの要素を表示したい...