Online PHP editor | output for 5DREG

@ 2021-12-24T08:00:44Z

<?php

$values = [
    [
        'id' => '2',
        'category_id' => 'A',
    ], [
        'id' => '30',
        'category_id' => 'A',
    ], [
        'id' => '12',
        'category_id' => 'B',
    ], [
        'id' => '8',
        'category_id' => 'B',
    ], [
        'id' => '10',
        'category_id' => 'C',
    ], [
        'id' => '329',
        'category_id' => 'D',
    ], [
        'id' => '89',
        'category_id' => 'E',
    ], [
        'id' => '79',
        'category_id' => 'E',
    ], [
        'id' => '58',
        'category_id' => 'A',
    ], [
        'id' => '219',
        'category_id' => 'B',
    ], [
        'id' => '44',
        'category_id' => 'B',
    ], [
        'id' => '3219',
        'category_id' => 'B',
    ], [
        'id' => '231',
        'category_id' => 'B',
    ], [
        'id' => '43210',
        'category_id' => 'F',
    ]
];

// 一次元配列にする
$categoryIds = array_column($values, 'category_id');
// 処理済みの category_id を格納する変数
$sorted = [];
// 残っている category_id が一種類のみかどうかを判定する変数
$hasOneSubject = false;

$sorting = function ($categoryIds) use (&$sorting, &$sorted, &$hasOneCategory) {
    // 重複を削除した category_id
    $uniqueCategory = array_unique($categoryIds);
    // 使用済みの category_id を格納しておく変数
    $used = [];

    foreach ($categoryIds as $index => $id) {
        // 処理済みの配列から一番最後を取得
        $lastKey = array_key_last($sorted);
        // 残りの category_id が一種類しかない場合を除き、直近の配列が同じ場合はskip。
        if (isset($sorted[$lastKey]) && $sorted[$lastKey] === $id && !$hasOneCategory) {
            continue;
        }
        // category_id を全種類使い切った場合は使用済みをリセットする
        if (count($uniqueCategory) === count(array_unique($used))) {
            $used = [];
        }
        // 既に同一の category_id を処理済みの場合はskip
        if (in_array($id, $used)) {
            continue;
        }
        $sorted[$index] = $id;
        $used[] = $id;
    }

    // 残りの配列
    $diff = array_diff_assoc($categoryIds, $sorted);
    // 残りの配列が一種類かどうか
    $hasOneCategory = count(array_unique($diff)) === 1;

    // 残っている配列がある場合は再帰処理を実施
    if (count($diff) > 0) {
        return $sorting($diff);
    }
    return $sorted;
};

$sortedValues = [];
// 二次元配列次元配列として入れ直す
foreach ($sorting($categoryIds) as $key => $value) {
    $sortedValues[$key] = $values[$key];
}
var_dump($sortedValues);

Output for 7.3.13 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(14) { [0]=> array(2) { ["id"]=> string(1) "2" ["category_id"]=> string(1) "A" } [2]=> array(2) { ["id"]=> string(2) "12" ["category_id"]=> string(1) "B" } [4]=> array(2) { ["id"]=> string(2) "10" ["category_id"]=> string(1) "C" } [5]=> array(2) { ["id"]=> string(3) "329" ["category_id"]=> string(1) "D" } [6]=> array(2) { ["id"]=> string(2) "89" ["category_id"]=> string(1) "E" } [13]=> array(2) { ["id"]=> string(5) "43210" ["category_id"]=> string(1) "F" } [1]=> array(2) { ["id"]=> string(2) "30" ["category_id"]=> string(1) "A" } [3]=> array(2) { ["id"]=> string(1) "8" ["category_id"]=> string(1) "B" } [7]=> array(2) { ["id"]=> string(2) "79" ["category_id"]=> string(1) "E" } [8]=> array(2) { ["id"]=> string(2) "58" ["category_id"]=> string(1) "A" } [9]=> array(2) { ["id"]=> string(3) "219" ["category_id"]=> string(1) "B" } [10]=> array(2) { ["id"]=> string(2) "44" ["category_id"]=> string(1) "B" } [11]=> array(2) { ["id"]=> string(4) "3219" ["category_id"]=> string(1) "B" } [12]=> array(2) { ["id"]=> string(3) "231" ["category_id"]=> string(1) "B" } }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(14) { [0]=> array(2) { ["id"]=> string(1) "2" ["category_id"]=> string(1) "A" } [2]=> array(2) { ["id"]=> string(2) "12" ["category_id"]=> string(1) "B" } [4]=> array(2) { ["id"]=> string(2) "10" ["category_id"]=> string(1) "C" } [5]=> array(2) { ["id"]=> string(3) "329" ["category_id"]=> string(1) "D" } [6]=> array(2) { ["id"]=> string(2) "89" ["category_id"]=> string(1) "E" } [13]=> array(2) { ["id"]=> string(5) "43210" ["category_id"]=> string(1) "F" } [1]=> array(2) { ["id"]=> string(2) "30" ["category_id"]=> string(1) "A" } [3]=> array(2) { ["id"]=> string(1) "8" ["category_id"]=> string(1) "B" } [7]=> array(2) { ["id"]=> string(2) "79" ["category_id"]=> string(1) "E" } [8]=> array(2) { ["id"]=> string(2) "58" ["category_id"]=> string(1) "A" } [9]=> array(2) { ["id"]=> string(3) "219" ["category_id"]=> string(1) "B" } [10]=> array(2) { ["id"]=> string(2) "44" ["category_id"]=> string(1) "B" } [11]=> array(2) { ["id"]=> string(4) "3219" ["category_id"]=> string(1) "B" } [12]=> array(2) { ["id"]=> string(3) "231" ["category_id"]=> string(1) "B" } }

preferences:dark modelive preview