Question

我有一个数组

[0] => ['name' => John, city => NY, street => WallStreet ..some anouther fields]
[1] => ['name' => Bill, city => FI, street => smstr..  some anouther fields]
[2] => ['name' => John, city => NY, street => WallStreet  ..some anouther fields]
[3] => ['name' => Bill, city => FI, street => smstr ..some anouther fields]
[4] => ['name' => 4, city => 4, street => 4 ..some anouther fields]

我需要对其进行排序，以便将所有重复名称的城市和街道字段放在数组顶部或按顺序排列

我想要什么

[] => ['name' => John, city => NY, street => WallStreet..some anouther fields]
[] => ['name' => John, city => NY, street => WallStreet ..some anouther fields]
[] => ['name' => Bill, city => FI, street => smstr  ..some anouther fields]
[] => ['name' => Bill, city => FI, street => smstr ..some anouther fields]
[] => ['name' => 4, city => 4, street => 4 ..some anouther fields]

我正在尝试使用usort

 usort($sorted, function($a, $b) {
            if ($a['name'] == $b['name'] &&
              $a['city'] == $b['city'] &&
              $a['street'] == $b['street']
            ){
                return 1;
            }
            else {
                return -1;
            }
        });

但它在php 5.3上不起作用，有人可以提出解决方案吗？

p / s我正在使用php 5.3 :(

Answer 1

您可以映射到一个插入值的数组，按降序排序并按该数组对原始数据进行排序：

array_multisort(array_map(function($v) {
                              return implode('-', $v);
                          }, $array), 
                SORT_DESC, $array);

要打破它并理解这些碎片：

// Build an array of the values in each sub array
// John-NY-WallStreet
$sorter = array_map(function($v) { return implode('-', $v); }, $array);
print_r($sorter);
// Sort that descending sorting the original array the same
array_multisort($sorter, SORT_DESC, $array);

这适用于数组中的所有元素。如果由于某种原因您只需要name，city和street，请将return替换为：

return $v['name'].'-'.$v['city'].'-'.$v['street'];

Usort按重复值排序多维数组

1 个答案: