php - 将键添加到数组 PHP 中尚无键的值

Question

给定休闲数组$array:

Array
 (
  [1] => Array
    (
        [0] => 267
        [location_id_keep] => 261
    )
  [2] => Array
    (
        [0] => 266
        [location_id_keep] => 262
    )
  [3] => Array
    (
        [0] => 2669
        [1] => 2670
        [location_id_keep] => 2668
    )
  [4] => Array
    (
        [0] => 266
        [1] => 2670
        [location_id_keep] => 2668
    )
  )

我想向没有 [location_id_keep] 键的每个数组值添加休闲键:[location_id_delete] 以便我将获得此输出:

Array

(

[1] => Array
    (
        [location_id_delete] => 267
        [location_id_keep] => 261
    )

[2] => Array
    (
        [location_id_delete] => 266
        [location_id_keep] => 262
    )
[3] => Array
    (
        [location_id_delete] => [2669, 2670]
        [location_id_keep] => 2668
    )

[4] => Array
    (
        [location_id_delete] => [266, 2670]
        [location_id_keep] => 2668
    )
)

是否有任何方法可以在分配给没有键的现有值的数组中添加键？

Answer 1

这应该可行，但我建议您应该重建数据结构。 Demo

foreach($arrays as &$array){
    if($array["location_id_keep"]){
        $temp_array["location_id_keep"] = $array["location_id_keep"];
        unset($array["location_id_keep"]);
    }
    $count = count($array);
    if($count == 1) {
        $temp_array["location_id_delete"] = current($array);
    }elseif($count > 1){
        $temp_array["location_id_delete"] = array_values($array);
    }
    $array = $temp_array;
}