PHP - 合并两个对象数组，包括其他对象

Question

在我的 symfony 项目中，我需要能够在删除重复项的同时合并多个对象数组。例如 ：数组 1：Array(    [0] => Absence Object        (            [id] => 1            [type] => TypeConge Object ([id] => 4, [nom] => "Maladie")            [user] => User Object (......)            [debut] => 12-11-2019 00:00:00        )    [1] => Absence Object        (            [id] => 2            [type] => TypeConge Object ([id] => 5, [nom] => "CA")            [user] => User Object (......)            [debut] => 13-11-2019 00:00:00        )    [2] => Absence Object        (            [id] => 3            [type] => TypeConge Object ([id] => 4, [nom] => "Maladie")            [user] => User Object (......)            [debut] => 11-11-2019 00:00:00        )    )阵列 2：Array(    [0] => Absence Object        (            [id] => 1            [type] => TypeConge Object ([id] => 4, [nom] => "Maladie")            [user] => User Object (......)            [debut] => 12-11-2019 00:00:00        )    [1] => Absence Object        (            [id] => 8            [type] => TypeConge Object ([id] => 4, [nom] => "Maladie")            [user] => User Object (......)            [debut] => 17-11-2019 00:00:00        )    )输出：    Array(    [0] => Absence Object        (            [id] => 1            [type] => TypeConge Object ([id] => 4, [nom] => "Maladie")            [user] => User Object (......)            [debut] => 12-11-2019 00:00:00        )    [1] => Absence Object        (            [id] => 2            [type] => TypeConge Object ([id] => 5, [nom] => "CA")            [user] => User Object (......)            [debut] => 13-11-2019 00:00:00        )我使用这段代码来做到这一点：$demandes = $this->getDemandesValidateur($unUser, $search, $superValidation);$tabDemandes = array_merge($tabDemandes, $demandes);$tabDemandes = array_map("unserialize", array_unique(array_map("serialize", $tabDemandes)));但我的印象是，由于序列化和反序列化，它会导致错误。我得到了很好的决赛桌，但有些数据似乎无法使用。例如我不能打电话：$absence->getType()->getNom();它有时会返回 null。是因为我的代码吗？

Answer 1

根据 splash58 的评论，您可以使用array_column()然后合并数组，同时只保留第一项。可以在这里看到一个样本。

<?php

$records = array(

    array(

        'id' => 2135,

        'first_name' => 'John',

        'last_name' => 'Doe',

    ),

    array(

        'id' => 3245,

        'first_name' => 'Sally',

        'last_name' => 'Smith',

    ),

    array(

        'id' => 5342,

        'first_name' => 'Jane',

        'last_name' => 'Jones',

    ),

    array(

        'id' => 5623,

        'first_name' => 'Peter',

        'last_name' => 'Doe',

    )

);

$records2 = array(

    array(

        'id' => 2135,

        'first_name' => 'John',

        'last_name' => 'Doe',

    ),

    array(

        'id' => 3245,

        'first_name' => 'Sally',

        'last_name' => 'Smith',

    ),

    array(

        'id' => 5342,

        'first_name' => 'Jane',

        'last_name' => 'Jones',

    ),

    array(

        'id' => 5624,

        'first_name' => 'Peter',

        'last_name' => 'Doe',

    )

);

$first = array_column($records, null, 'id');

$second = array_column($records2, null, 'id');

$third = $first + $second;

// if you want to reset indexes

// $third = array_values($third);

echo print_r($third);

Answer 2

你可以这样做：

$result = [];

$array1 = [

  [

    "id" => 1,

    "other_data" => "text1"

  ],

  [

    "id" => 2,

    "other_data" => "text2"

  ],

  [

    "id" => 3,

    "other_data" => "text3"

  ],  

];

$array2 = [

  [

    "id" => 1,

    "other_data" => "text1"

  ],

  [

    "id" => 8,

    "other_data" => "text8"

  ],

];

$merge_array = function($array, $result) {

  foreach($array as $element) {

      $id = $element["id"]; //In your case it could be $element->getId()

      if(!isset($result[$id])) { 

         $result[$id] = $element;

      }

  }

  return $result;

};

$result = $merge_array($array1, $result);

$result = $merge_array($array2, $result);

print_r(array_values($result));