基於鍵范圍的PHP SPLIT數組

Question

我有一個陣列。

Array
    (
        [initial] => MSS
        [hour] => 5.2
        [row_checker_1] => 1
        [project_name_1] => KGD001
        [project_shortcode_1] => KGD001
        [5_1] => 23
        [6_1] => 3.3
        [4_1] => 23.2
        [remarks_1] =>  on going
        [task_id] => 76
        [row_checker_2] => 2
        [project_name_2] => DG001
        [project_shortcode_2] => DG001
        [5_2] => 1.1
        [6_2] => 2.2
        [4_2] => 3.1
        [remarks_2] =>   on going
    )

現在我想拆分所有元素的上限范圍鍵是“project_shortcode_1”，而下限范圍鍵是remarks_1。

所以，新數組應該如下所示：

array
    (
        [5_1] => 23
        [6_1] => 3.3
        [4_1] => 23.2
    )

Answer 1

使用帶有標志ARRAY_FILTER_USE_KEY來使用數組鍵，並與獲取所需鍵所需的邏輯進行比較。 它適用於PHP 5.6。

$arr = array ( "initial" => "MSS",
        "hour" => 5.2,
        "row_checker_1" => 1,
        "project_name_1" => "KGD001",
        "project_shortcode_1" => "KGD001",
        "5_1" => 23,
        "6_1" => 3.3,
        "4_1" => 23.2,
        "remarks_1" =>  "on going",
        "task_id" => 76,
        "row_checker_2" => 2,
        "project_name_2" => "DG001",
        "project_shortcode_2" => "DG001",
        "5_2" => 1.1,
        "6_2" => 2.2,
        "4_2" => 3.1,
        "remarks_2" =>   "on going",
    );

// PHP > 5.6
$result = array_filter($arr, function($k){
    $var = explode('_', $k);
    return is_numeric($var[0]) && $var[1]==1;
}, ARRAY_FILTER_USE_KEY);

Answer 2

如果你需要的是一個包含所有范圍NUMBER_N的多維數組，那么使用類似的東西（從Dmitriy Demir答案擴展）：

$myArray = array(
    'initial' => 'MSS',
    'hour' => '5.2',
    'row_checker_1' => '1',
    'project_name_1' => 'KGD001',
    'project_shortcode_1' => 'KGD001',
    '5_1' => '23',
    '6_1' => '3.3',
    '4_1' => '23.2',
    'remarks_1' => 'on going',
    'task_id' => '76',
    'row_checker_2' => '2',
    'project_name_2' => 'DG001',
    'project_shortcode_2' => 'DG001',
    '5_2' => '1.1',
    '6_2' => '2.2',
    '4_2' => '3.1',
    'remarks_2' => 'on going'
);

function splitRange($a){
    $newArray = array();
    foreach ($a as $k => $v) {
        $rightFormat = preg_match('/^\d+_(\d+)$/', $k, $index);
        if ($rightFormat)
            $newArray[$index[1]][$k] = $v;
    }
    return $newArray;
}

print_r(splitRange($myArray));

結果將是這樣的：

    Array
(
    [1] => Array
        (
            [5_1] => 23
            [6_1] => 3.3
            [4_1] => 23.2
        )

    [2] => Array
        (
            [5_2] => 1.1
            [6_2] => 2.2
            [4_2] => 3.1
        )

)

感N從NUMBER_N陣列的索引。

Answer 3

由於您在評論中提到您希望獲得格式為NUMBER_1所有值，我認為您需要遍歷數組並使用regex檢查值名稱，然后將值添加到新數組中標准。 這是我將如何做到這一點：

$myArray = array(
    'initial' => 'MSS',
    'hour' => '5.2',
    'row_checker_1' => '1',
    'project_name_1' => 'KGD001',
    'project_shortcode_1' => 'KGD001',
    '5_1' => '23',
    '6_1' => '3.3',
    '4_1' => '23.2',
    'remarks_1' => 'on going',
    'task_id' => '76',
    'row_checker_2' => '2',
    'project_name_2' => 'DG001',
    'project_shortcode_2' => 'DG001',
    '5_2' => '1.1',
    '6_2a' => '2.2',
    '4_2' => '3.1',
    'remarks_2' => 'on going'
);

$newArray = array();
foreach ($myArray as $k => $v) {
    $rightFormat = preg_match('/^\d+_\d+$/', $k);
    if ($rightFormat)
        $newArray[$k] = $v;
}
print_r($newArray);

在這種情況下， print_r的結果將是：

數組（[5_1] => 23 [6_1] => 3.3 [4_1] => 23.2 [5_2] => 1.1 [6_2] => 2.2 [4_2] => 3.1）

如果下划線后的數字應始終為1，則將正則表達式從/^\\d+_\\d+$/更改為/^\\d+_1$/ 。

你可以玩，看看正則表達式如何在這里工作 。

PS：我已將所有值設置為字符串以方便使用。 隨意修改它。

Answer 4

基於正則表達式的解決方案似乎適合這個問題。

preg_grep（）是一個設計用於對數組中的每個值應用正則表達式過濾器的函數。 對於這種情況，我需要進行更多調整，因為必須過濾密鑰。

單線 ：

$output=array_intersect_key($input,array_flip(preg_grep("/^\d+_1$/",array_keys($input)))));
/* array (
      '5_1' => 23,
      '6_1' => 3.3,
      '4_1' => 23.2,
    )*/

這是一步一步的數組操作......

array_keys($input);  // create array with input keys as values
/* array (
      0 => 'initial',
      1 => 'hour',
      2 => 'row_checker_1',
      3 => 'project_name_1',
      4 => 'project_shortcode_1',
      5 => '5_1',
      6 => '6_1',
      7 => '4_1',
      8 => 'remarks_1',
      9 => 'task_id',
      10 => 'row_checker_2',
      11 => 'project_name_2',
      12 => 'project_shortcode_2',
      13 => '5_2',
      14 => '6_2',
      15 => '4_2',
      16 => 'remarks_2',
   ) */

preg_grep("/^\d+_1$/",array_keys($input));  // filter the input array using regex pattern
/* array (
      5 => '5_1',
      6 => '6_1',
      7 => '4_1',
   ) */

array_flip(preg_grep("/^\d+_1$/",array_keys($input))); // flip the filtered array
/* array (
      '5_1' => 5,
      '6_1' => 6,
      '4_1' => 7,
   )*/

array_intersect_key($input,array_flip(preg_grep("/^\d+_1$/",array_keys($input))));  // filter input by comparing keys against filtered array
/* array (
      '5_1' => 23,
      '6_1' => 3.3,
      '4_1' => 23.2,
   )*/