如何生成这样一个php数组

[misaka去年夏天]

如何用php代码，生成这样的数组：
$arr = array(
array(
'A'=>0,
'B'=>0,
'C'=>0,
'D'=>0,
'E'=>0
),
array(
'A'=>1,
'B'=>0,
'C'=>0,
'D'=>0,
'E'=>0
)
.......
)


这个数组包含了A-E各为0为1的所有情况，用php写出这样的数组，应该怎么写？

[xuzuning]

$k = array('A', 'B', 'C', 'D', 'E');
for($i=0;$i<32; $i++) {
  $v = str_split(sprintf('%05b', $i));
  $a[] = array_combine($k, $v);
}
print_r($a);

Array
(
    [0] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 0
            [D] => 0
            [E] => 0
        )

    [1] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 0
            [D] => 0
            [E] => 1
        )

    [2] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 0
            [D] => 1
            [E] => 0
        )

    [3] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 0
            [D] => 1
            [E] => 1
        )

    [4] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 1
            [D] => 0
            [E] => 0
        )

    [5] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 1
            [D] => 0
            [E] => 1
        )

    [6] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 1
            [D] => 1
            [E] => 0
        )

    [7] => Array
        (
            [A] => 0
            [B] => 0
            [C] => 1
            [D] => 1
            [E] => 1
        )

    [8] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 0
            [D] => 0
            [E] => 0
        )

    [9] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 0
            [D] => 0
            [E] => 1
        )

    [10] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 0
            [D] => 1
            [E] => 0
        )

    [11] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 0
            [D] => 1
            [E] => 1
        )

    [12] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 1
            [D] => 0
            [E] => 0
        )

    [13] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 1
            [D] => 0
            [E] => 1
        )

    [14] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 1
            [D] => 1
            [E] => 0
        )

    [15] => Array
        (
            [A] => 0
            [B] => 1
            [C] => 1
            [D] => 1
            [E] => 1
        )

    [16] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 0
            [D] => 0
            [E] => 0
        )

    [17] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 0
            [D] => 0
            [E] => 1
        )

    [18] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 0
            [D] => 1
            [E] => 0
        )

    [19] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 0
            [D] => 1
            [E] => 1
        )

    [20] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 1
            [D] => 0
            [E] => 0
        )

    [21] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 1
            [D] => 0
            [E] => 1
        )

    [22] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 1
            [D] => 1
            [E] => 0
        )

    [23] => Array
        (
            [A] => 1
            [B] => 0
            [C] => 1
            [D] => 1
            [E] => 1
        )

    [24] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 0
            [D] => 0
            [E] => 0
        )

    [25] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 0
            [D] => 0
            [E] => 1
        )

    [26] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 0
            [D] => 1
            [E] => 0
        )

    [27] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 0
            [D] => 1
            [E] => 1
        )

    [28] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 1
            [D] => 0
            [E] => 0
        )

    [29] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 1
            [D] => 0
            [E] => 1
        )

    [30] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 1
            [D] => 1
            [E] => 0
        )

    [31] => Array
        (
            [A] => 1
            [B] => 1
            [C] => 1
            [D] => 1
            [E] => 1
        )

)