PHP获取以字母递增为键值的数组。
/**
* 获取以字母递增为键值的数组
* @param bool $capitalization
* @param int $length
* @return array
*/
function getCharList($capitalization = true, $length = 26) {
$key = $capitalization ? 65/*大写字母*/ : 97/*小写字母*/;
$list = array();
for ($i = 1; $i <= $length; $i++) {
$list[] = chr($key);
$key++;
}
return $list;
}示例：
echo '<pre>';print_r(getCharList(false));打印结果如下：
Array
(
[0] => a
[1] => b
[2] => c
[3] => d
[4] => e
[5] => f
[6] => g
[7] => h
[8] => i
[9] => j
[10] => k
[11] => l
[12] => m
[13] => n
[14] => o
[15] => p
[16] => q
[17] => r
[18] => s
[19] => t
[20] => u
[21] => v
[22] => w
[23] => x
[24] => y
[25] => z
)