按键值对PHP中对象数组的数组进行排序

问题描述：

基本上我有如下设置:

Array ( 
[0] => Array ( [0] => stdClass Object ( [nid] => 1 [title] => title1 [uid] => 1 [parent] => 0 [weight] => -15 [name] => name1 [value] => 0 )
               [1] => stdClass Object ( [nid] => 2 [title] => title2 [uid] => 1 [parent] => 0 [weight] => -7 [name] => name2 [value] => 100 )
               [2] => stdClass Object ( [nid] => 3 [title] => title3 [uid] => 2 [parent] => 0 [weight] => -1 [name] => name3 [value] => 0 )
               [3] => stdClass Object ( [nid] => 4 [title] => title4 [uid] => 2 [parent] => 0 [weight] => 1 [name] => name4 [value] => 80 )
              )
  )

我需要的是一种通过对象中的 [value] 键对父数组中的所有数组进行排序的方法.我已经用 usort 和不同的方法尝试了大约 2 天，但我似乎无法理解它.[value] 键的范围是 0 到 100，我需要按降序排列所有数组(即:100 到 0).

What I need is a way to sort all the arrays inside the parent array by the [value] key in the Object. I've been trying for about 2 days now with usort and different methods but I just can't seem to get my head around it. The [value] key will range anywhere from 0 to 100 and I need all of the arrays sorted in decreasing order (IE: 100 down to 0).

答

使用 usort:

function cmp($a, $b) {
  if ($a->value == $b->value) {
    return 0;
  } else {
    return $a->value < $b->value ? 1 : -1; // reverse order
  }
}

usort($arr, 'cmp');

按键值对PHP中对象数组的数组进行排序

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