我怎么然后通过PHP的价值排序字符串长度的数组

我怎么然后通过PHP的价值排序字符串长度的数组

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问题描述

目前,我有我的数组通过字符串长度排序。但是,当字符串长度相等,我怎么排序的价值?

作为一个例子,我现在的code:

  $阵列=阵列(A,BC,AA,C,BB,B);功能lensort($ A,$ B){
    返回的strlen($ A)-strlen($ B);
}usort($阵列,'lensort');的print_r($数组);

输出:

 阵列

    [0] => C
    [1] =>一个
    [2] =>乙
    [3] => BB
    [4] => AA
    [5] =>公元前

不过,我想它由以下代替排序:

 阵列

    [0] =>一个
    [1] =>乙
    [2] => C
    [3] => AA
    [4] => BB
    [5] =>公元前


解决方案

二者结合检查到你的比较:

 函数lensort($ A,$ B){
    $ LA = strlen的($ A); $磅= strlen的($ B);
    如果($ LA == $磅){
        返回STRCMP($ A,$ B);
    }
    回拉$ - $磅;
}

您可以从,这将显示:

 阵列

    [0] =>一个
    [1] =>乙
    [2] => C
    [3] => AA
    [4] => BB
    [5] =>公元前

Currently, I have my array sorting by string length. But, when the string lengths are equal, how do I sort by value?

As an example, my current code:

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

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

usort($array,'lensort');

print_r($array);

Outputs:

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

But, I'd like it to sort by the following instead:

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

Incorporate both checks into your comparator:

function lensort($a,$b){
    $la = strlen( $a); $lb = strlen( $b);
    if( $la == $lb) {
        return strcmp( $a, $b);
    }
    return $la - $lb;
}

You can see from this demo that this prints:

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

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08-20 23:30