如何在PHP中的现有数组中推送基于条件的值

Question

我有三个数组

1. 主题已选
2. 相关组
3. topicAssingned

$topicsSelected = [ "T-100","T-600"];

$relavantGroups = [
                    [ "id" => "G-001","name" => "3 A","active" => false ], 
                    ["id" => "G-002","name" => "3 B","active" => false]  
                  ];

$topicAssingned = [
    "G-001" => [
        "groupID" => "G-001",
        "groupName" => "3 A",
        "topics" => [
            "T-100" => [
                "topicID" => "T-100"
            ],
            "T-200" => [
                "topicID" => "T-200"
            ]
        ]
    ],
    "G-002" => [
        "groupID" => "G-002",
        "groupName" => "3 B",
        "topics" => [
            "T-400" => [
                "topicID" => "T-400"
            ],
            "T-500" => [
                "topicID" => "T-500"
            ]
        ]
    ],
];

$topicsSelected 数组值至少应该存在一个值 $topicAssingned 表示基于 groupID，我必须将一个值推送到 $relavantGroups 就像 disable : D 假设值不存在表示 禁用：A

预期输出：

[
     "id" => "G-001",
    "name" => "3 A",
    "active" => false,
    "disable" => "D"
],
[
     "id" => "G-002",
    "name" => "3 B",
    "active" => false,
    "disable" => "A"
]

Answer 1

<?php 

$topicsSelected = [ "T-100","T-600"];

$relavantGroups = [
    [ "id" => "G-001","name" => "3 A","active" => false ],
    ["id" => "G-002","name" => "3 B","active" => false]
];

$topicAssigned = [
    "G-001" => [
        "groupID" => "G-001",
        "groupName" => "3 A",
        "topics" => [
            "T-100" => [
                "topicID" => "T-100"
            ],
            "T-200" => [
                "topicID" => "T-200"
            ]
        ]
    ],
    "G-002" => [
        "groupID" => "G-002",
        "groupName" => "3 B",
        "topics" => [
            "T-400" => [
                "topicID" => "T-400"
            ],
            "T-500" => [
                "topicID" => "T-500"
            ]
        ]
    ],
];

$topic_selected_map = [];

foreach($topicsSelected as $each_topic){
    $topic_selected_map[$each_topic] = true;
}

$relevant_group_map = [];

foreach($relavantGroups as $each_group){
    $relevant_group_map[$each_group['id']] = $each_group;
}

$result = [];

foreach($topicAssigned as $each_assigned_topic){
    if(!isset($relevant_group_map[$each_assigned_topic['groupID']])) continue;

    $topics_not_found = true;
    foreach($each_assigned_topic['topics'] as $each_topic => $topic_details){
        if(isset($topic_selected_map[$each_topic])){
            $topics_not_found = false;
            break;
        }
    }

    $result[] = [
        'id' => $each_assigned_topic['groupID'],
        'name' => $each_assigned_topic['groupName'],
        'active' => $relevant_group_map[$each_assigned_topic['groupID']]['active'],
        'disable' => ($topics_not_found === true ? 'A' : 'D')
    ];
}


print_r($result);

输出：

Array
(
    [0] => Array
        (
            [id] => G-001
            [name] => 3 A
            [active] => false
            [disable] => D
        )

    [1] => Array
        (
            [id] => G-002
            [name] => 3 B
            [active] => false
            [disable] => A
        )

)

• 首先，制作$topicsSelected 值的映射（关联数组）。 $relavantGroups 也是如此。这是为了让检查更有效率。在Hash Table 上查看更多信息。

• 现在，遍历$topicAssigned，然后遍历其中每个组的topics。现在，使用简单的isset 函数检查$topicsSelected 中是否存在主题。如果是，我们禁用它们，否则我们不禁用。

Answer 2

你问的不是很清楚，代码有点奇怪，但我会试一试。 首先修复您的数组声明 - 您应该使用 => 而不是 :;

您必须迭代 $relavantGroups 并为每个元素迭代 $topicAssingned 数组。然后进行简单的比较，看看Id 组是否存在，就完成了！

这是我的解决方案（又快又脏）： You can see it here

foreach ($relavantGroups as &$g) {
    $found = false;
    foreach ($topicAssingned as $key => $assigned) {
        if ($key === $g["id"] && is_array($assigned["topics"])) {
            foreach ($assigned["topics"] as $topic) {
                if (in_array($topic["topicID"], $topicsSelected)) {
                    $found = true;
                    break;
                }
            }
        }
    }
    $g["disable"] = $found ? "D" : "A";
}
var_dump($relavantGroups);

更新了解决方案 - 请注意，我使用 in_array() 来确定 topicID 是否存在。这意味着$topicsSelected 数组中的任何值都会影响结果。

希望我能帮上忙。

这将输出（基于您的示例）：

array(2) {
  [0]=> array(4) {
    ["id"]=> string(5) "G-001"
    ["name"]=> string(3) "3 A"
    ["active"]=> bool(false)
    ["disable"]=> string(1) "D"
  }
  [1]=> array(4) {
    ["id"]=> string(5) "G-002"
    ["name"]=> string(3) "3 B"
    ["active"]=> bool(false)
    ["disable"]=> string(1) "A"
  }
}