Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
    [6] => 7
    [7] => 8
    [8] => 9
    [9] => 10
    [10] => 11
    [11] => 12
    [12] => 13
    [13] => 14
    [14] => 15
    [15] => 16
    [16] => 17
    [17] => 18
    [18] => 19
    [19] => 20
    [20] => 21
    [21] => 22
    [22] => 23
    [23] => 24
    [24] => 25
    [25] => 26
    [26] => 27
    [27] => 28
    [28] => 29
    [29] => 30
    [30] => 31
    [31] => 32
    [32] => 33
    [33] => 34
    [34] => 35
    [35] => 36
    [36] => 37
    [37] => 38
    [38] => 39
    [39] => 40
    [40] => 41
    [41] => 42
    [42] => 43
    [43] => 44
    [44] => 45
    [45] => 46
    [46] => 47
    [47] => 48
    [48] => 49
)
<pre> 
 Array
(
)
</pre><pre> 
 Array
(
    [0] => Array
        (
            [0] => 23
            [1] => 3
            [2] => 20
            [3] => 45
            [4] => 42
            [5] => 25
            [6] => 39
        )

    [1] => Array
        (
            [0] => 2
            [1] => 35
            [2] => 29
            [3] => 40
            [4] => 13
            [5] => 27
            [6] => 47
        )

    [2] => Array
        (
            [0] => 6
            [1] => 28
            [2] => 33
            [3] => 34
            [4] => 30
            [5] => 16
            [6] => 12
        )

    [3] => Array
        (
            [0] => 4
            [1] => 14
            [2] => 11
            [3] => 1
            [4] => 43
            [5] => 22
            [6] => 10
        )

    [4] => Array
        (
            [0] => 41
            [1] => 48
            [2] => 31
            [3] => 15
            [4] => 36
            [5] => 49
            [6] => 37
        )

    [5] => Array
        (
            [0] => 46
            [1] => 17
            [2] => 7
            [3] => 44
            [4] => 18
            [5] => 24
            [6] => 9
        )

    [6] => Array
        (
            [0] => 38
            [1] => 26
            [2] => 8
            [3] => 21
            [4] => 5
            [5] => 19
            [6] => 32
        )

)
</pre>