如何在 PHP 中按值对对象数组集合进行排序

Question

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，我如何根据 的值对其结果进行排序col_order？结果应该是这样的：

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"
        }
}

我尝试过asort()在这里使用，但它似乎只支持关联数组。有什么办法可以解决这个问题吗？

Answer 1

您可以使用usort()

$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);

输出 ：

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)

但我建议您直接从 SQL 查询中对结果进行排序：

SELECT *
FROM yourTable
...
ORDER BY col_order ASC