php - PHP [数组键]：将“0”转换为“A”，“1”转换为“B”......（因此“89”将成为“IJ”）函数

Question

假设我有一个这样的数组：

$array = array
("this","is","me","and","I","am","an","array","hello","beautiful","world");

如何创建一个将 0 转换为“A”、1 转换为“B”的函数......？ 使用Foreach还是...？

所以，而不是

 Array
(
    [0] => this
    [1] => is
    [2] => me
    [3] => and
    [4] => I
    [5] => am
    [6] => an
    [7] => array
    [8] => hello
    [9] => beautiful
    [10] => world
)

我会得到

 Array
(
    ['A'] => this
    ['B'] => is
    ['C'] => me
    ['D'] => and
    ['E'] => I
    ['F'] => am
    ['G'] => an
    ['H'] => array
    ['I'] => hello
    ['J'] => beautiful
    ['BA'] => world
)

Answer 1

function digits_to_letters($input) {
    return strtr($input, "0123456789", "ABCDEFGHIJ");
}

$result = array_flip(array_map("digits_to_letters", array_flip($original)));

（示例运行：http: //ideone.com/TQNYj）

---

如果您更喜欢foreach+ array_flip，array_map则可以改用它：

$result = array();
foreach($original as $k => $v) {
    $result[strtr($k, "0123456789", "ABCDEFGHIJ")] = $v;
}