目前,我的数组按字符串长度排序。但是,当字符串长度相等时,我如何按值排序?
例如,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($array);
输出:
Array
(
[0] => C
[1] => A
[2] => B
[3] => BB
[4] => AA
[5] => BC
)
但是,我希望按以下方式排序:
Array
(
[0] => A
[1] => B
[2] => C
[3] => AA
[4] => BB
[5] => BC
)
答案 0 :(得分:11)
将两项检查合并到比较器中:
function lensort($a,$b){
$la = strlen( $a); $lb = strlen( $b);
if( $la == $lb) {
return strcmp( $a, $b);
}
return $la - $lb;
}
你可以从this demo看到这打印:
Array
(
[0] => A
[1] => B
[2] => C
[3] => AA
[4] => BB
[5] => BC
)
答案 1 :(得分:0)
这是另一种方法:
$f = function ($s1, $s2) {
$n = strlen($s1) <=> strlen($s2);
if ($n != 0) {
return $n;
}
return $s1 <=> $s2;
};
usort($array, $f);