如何通过键的值对带有stdClass对象的多维数组进行排序? [英] How do I sort a multidimensional array with stdClass Objects by values of a key?

问题描述

是的，我已经搜索并尝试了许多技术，但是似乎没有任何效果.这是我的数组:

Yes, I have searched and tried many techniques, but nothing seems to work. Here is my array:

Array
(
    [0] => stdClass Object
        (
            [id] => 119
            [name] => Business3
            [start_date] => 1338789600
            [end_date] => 1354604400
        )

    [1] => stdClass Object
        (
            [id] => 153
            [name] => Business1
            [start_date] => 1338962400
            [end_date] => 1370498400
        )

    [2] => stdClass Object
        (
            [id] => 135
            [name] => Business2  
            [start_date] => 1339653600
            [end_date] => 1356937200
        )
)

我基本上想按名称键对此进行排序，但是我在Stackoverflow上尝试过的每个功能似乎都无法正常工作，因为我得到了一个没有错误的空白页面.

I basically want to sort this by the name key, but every function I've tried on Stackoverflow doesn't seem to work, as in, I get a blank page with no error.

我尝试过:

function array_sort_by_column(&$arr, $col, $dir = SORT_ASC) {
    $sort_col = array();
    foreach ($arr as $key=> $row) {
        $sort_col[$key] = $row[$col];
    }

    array_multisort($sort_col, $dir, $arr);
}

array_sort_by_column(json_decode(json_encode($businesses), true), 'name');

但这没用.

有什么想法吗?

推荐答案

您几乎是对的，但是$row[$col]试图像数组一样访问对象.您需要类似$row->{$col}的名称.这是一个更简单的工作示例:

You're almost right, but $row[$col] tries to access the objects like an array. You want something like $row->{$col} instead. Here's a simpler, working example:

$db = array(
  0 => (object) array('name' => 'Business3'),
  1 => (object) array('name' => 'Business2'),
  2 => (object) array('name' => 'Business1')
);

$col  = 'name';
$sort = array();
foreach ($db as $i => $obj) {
  $sort[$i] = $obj->{$col};
}

$sorted_db = array_multisort($sort, SORT_ASC, $db);

print_r($db);

输出:

Array
(
    [0] => stdClass Object
        (
            [name] => Business1
        )

    [1] => stdClass Object
        (
            [name] => Business2
        )

    [2] => stdClass Object
        (
            [name] => Business3
        )

)

这篇关于如何通过键的值对带有stdClass对象的多维数组进行排序?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！