array_unique(删掉相同值)

1：php数据

2:显示

Array
(
    [0] => 5
    [1] => 5
    [2] => 4
    [3] => 3
    [4] => 4
    [5] => 4
    [6] => 4
    [7] => 6
    [8] => 6
    [9] => 6
    [10] => 3
    [11] => 2
    [12] => 1
    [13] => 6
    [14] => 2
    [15] => 7
    [16] => 2
)

Array
(
    [0] => 5
    [2] => 4
    [3] => 3
    [7] => 6
    [11] => 2
    [12] => 1
    [15] => 7
)

5,4,3,6,2,1,7