Question

我遇到了标题中描述的问题。

我的数组需要arsort函数（我需要从高到低并保持键）。

但是在字母字符之前我需要数字。

示例：

["5","2","1","D","BC","A"]

标准 arsort（）：

["D","BC","A","5","2","1"]

我需要：

["5","2","1","D","BC","A"]

我认为我必须使用其他功能，而不是使用其他功能，或者自己动手。

有人可以帮助我吗？

Answer 1

正如我在评论中建议的那样，如果你的键不要将数字和字母字符混合在一起，你可以转换数字键，缩短数组，然后将其转换回来：

<?php

$array = ["5","2","1","D","BC","A"];

$array2 = [];

foreach($array as $value) {
    if(is_numeric ($value)){
        $array2[] = intval($value);
    } else {
        $array2[] = $value;
    }
}

arsort($array2);

$endArray = [];
foreach($array2 as $value) {
    if(is_int($value)){
        $endArray[] = "$value";
    } else {
        $endArray[] = $value;
    }
}

var_dump($endArray);

https://3v4l.org/ZF3gI

Answer 2

$array = array("3", "1", "10","5","A","B","Z","C");
sort($array, SORT_NATURAL);

var_dump($array);

array(8) {
  [0]=>
  string(1) "1"
  [1]=>
  string(1) "3"
  [2]=>
  string(1) "5"
  [3]=>
  string(2) "10"
  [4]=>
  string(1) "A"
  [5]=>
  string(1) "B"
  [6]=>
  string(1) "C"
  [7]=>
  string(1) "Z"
}

按保留键的值（降序）自然排序：

$array = array("10"=>"3", "a"=>"1", 2=>"10","3"=>"5", "1"=>"A","20"=>"B","5"=>"Z","123"=>"C");
natsort($array);
$array = array_reverse($array, true);
var_dump($array);

array(8) {
  [0]=>
  string(1) "Z"
  [1]=>
  string(1) "C"
  [2]=>
  string(1) "B"
  [3]=>
  string(1) "A"
  [4]=>
  string(2) "10"
  [5]=>
  string(1) "5"
  [6]=>
  string(1) "3"
  ["a"]=>
  string(1) "1"
}

它应该有效，除非你想要一个不同的排序标准，那么你应该更好地解释它。

$array = array(6=>"115-0001 LMH", 7=>"158-0154 FGM", 8=>"116-0115 Korea", 9=>"VG1305154454", 0=>"VGE54815313", "10"=>"3", "a"=>"1", 2=>"10","3"=>"5", "1"=>"A","20"=>"B","5"=>"Z","123"=>"C");
natsort($array);
$array = array_reverse($array, true);
var_dump($array);

array(13) {
  [5]=>
  string(1) "Z"
  [0]=>
  string(11) "VGE54815313"
  [9]=>
  string(12) "VG1305154454"
  [123]=>
  string(1) "C"
  [20]=>
  string(1) "B"
  [1]=>
  string(1) "A"
  [7]=>
  string(12) "158-0154 FGM"
  [8]=>
  string(14) "116-0115 Korea"
  [6]=>
  string(12) "115-0001 LMH"
  [2]=>
  string(2) "10"
  [3]=>
  string(1) "5"
  [10]=>
  string(1) "3"
  ["a"]=>
  string(1) "1"
}

Answer 3

很抱歉第一次回答错误，现在 *已更新*

<?php
$arr = ["1","2","5","D","A","BC"];
$nums = [];
$chars = [];
foreach($arr as $v){
    if(is_numeric($v)){
        $nums[] = $v;
    }else{
        $chars[] = $v;
    }
}
rsort($nums);
arsort($chars);
$output = array_merge($nums, $chars);
print_r($output);
?>

在PhpFiddle.org

中试用

PHP - arsort（）但首先是

3 个答案: