如何在PHP中按值对对象数组集合排序

如何在PHP中按值对对象数组集合排序,php,arrays,sorting,arraycollection,Php,Arrays,Sorting,Arraycollection,所以我从数据库中得到了这个结果: object(Illuminate\Support\Collection)#538 (1) { ["items":protected]=> array(3) { [0]=> object(stdClass)#536 (3) { ["col_header"]=> string(7) "other_1" ["col_order"]=>

所以我从数据库中得到了这个结果:

object(Illuminate\Support\Collection)#538 (1) {
  ["items":protected]=>
    array(3) {
        [0]=>
        object(stdClass)#536 (3) {
           ["col_header"]=>
           string(7) "other_1"
           ["col_order"]=>
           int(12)
           ["data"]=>
           string(13) "asdgasdgfasdg"
        }
        [1]=>
        object(stdClass)#545 (3) {
           ["col_header"]=>
           string(7) "other_2"
           ["col_order"]=>
           int(10)
           ["data"]=>
           string(10) "dfhgsdhgsd"
       }
       [2]=>
       object(stdClass)#533 (3) {
           ["col_header"]=>
           string(7) "other_3"
           ["col_order"]=>
           int(11)
           ["data"]=>
           string(1) "s"
       }
}
现在,如何根据
col\u order
的值对其结果进行排序?结果如下:

object(Illuminate\Support\Collection)#538 (1) {
  ["items":protected]=>
    array(3) {
        [0]=>
        object(stdClass)#545 (3) {
           ["col_header"]=>
           string(7) "other_2"
           ["col_order"]=>
           int(10)
           ["data"]=>
           string(10) "dfhgsdhgsd"
        }
        [1]=>
        object(stdClass)#533 (3) {
           ["col_header"]=>
           string(7) "other_3"
           ["col_order"]=>
           int(11)
           ["data"]=>
           string(1) "s"
        }
        [2]=>
        object(stdClass)#536 (3) {
           ["col_header"]=>
           string(7) "other_1"
           ["col_order"]=>
           int(12)
           ["data"]=>
           string(13) "asdgasdgfasdg"
        }
}
我尝试在这里使用
asort()
,但它似乎只支持关联数组。有什么方法可以把这个排序出来吗?

答案是-它通过用户定义的比较函数进行排序。将以下代码段中的
a
替换为
col\u顺序

<?php

$class1 = new stdClass();
$class1->a = 1;
$class2 = new stdClass();
$class2->a = 2;
$class3 = new stdClass();
$class3->a = 3;

$input = [$class3,$class2,$class1];

var_dump($input);

usort($input, function($a, $b) {
      if ($a->a == $b->a) {
        return 0;
    }
    return ($a->a < $b->a) ? -1 : 1;
});

var_dump($input);
您可以使用

但我建议您直接从SQL查询对结果进行排序:

SELECT *
FROM yourTable
...
ORDER BY col_order ASC

您想知道为什么不在查询中使用orderBy吗?因为我以为你在使用laravel elquent,所以你可以在你的电脑上使用orderBy(“col_order”)query@MD.JubairMizan谢谢你的邀请。我还没想到呢!它解决了我的问题,将在我未来的场景中使用答案,函数体可以是php7中带有spaceship操作符的一行:
return$a->a$b->a@FilipHalaxa谢谢,我会把它添加到我的答案中。
$test = array(array("col_header" => "other_1",
                    "col_order" => 12,
                    "data" => "asdgasdgfasdg"),
              array("col_header" => "other_2",
                    "col_order" => 10,
                    "data" => "dfhgsdhgsd"),
              array("col_header" => "other_3",
                    "col_order" => 11,
                    "data" => "s"));

usort($test, function($a, $b)
             {
                 if ($a["col_order"] == $b["col_order"])
                     return (0);
                 return (($a["col_order"] < $b["col_order"]) ? -1 : 1);
             });

var_dump($test);
array (size=3)
  0 => 
    array (size=3)
      'col_header' => string 'other_2' (length=7)
      'col_order' => int 10
      'data' => string 'dfhgsdhgsd' (length=10)
  1 => 
    array (size=3)
      'col_header' => string 'other_3' (length=7)
      'col_order' => int 11
      'data' => string 's' (length=1)
  2 => 
    array (size=3)
      'col_header' => string 'other_1' (length=7)
      'col_order' => int 12
      'data' => string 'asdgasdgfasdg' (length=13)
SELECT *
FROM yourTable
...
ORDER BY col_order ASC