举个例子,我目前的代码：

$array = array("A","BC","AA","C","BB","B");

function lensort($a,$b){
    return strlen($a)-strlen($b);
}

usort($array,'lensort');

print_r($array);

输出：

Array
(
    [0] => C
    [1] => A
    [2] => B
    [3] => BB
    [4] => AA
    [5] => BC
)

但是,我希望它按以下方式排序：

Array
(
    [0] => A
    [1] => B
    [2] => C
    [3] => AA
    [4] => BB
    [5] => BC
)