如何选择一个数组项是否存在于其他多维数组中

Question

我有一个问题，我想查看一个多维数组的值（id_person）是否存在于其他多维数组中。 （id_person 是我想在这两个数组中比较的值 - Eddie Taylor: id_person 302 和 Jack Jones: id_person 311 exists in second array ）。我希望有人可以帮助我。非常感谢。

Array one: ($homesquad)

array(4) {
  [0]=>
  array(9) {
    ["id"]=>
    string(3) "277"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(1) "8"
    ["id_person"]=>
    string(3) "306"
    ["name"]=>
    string(10) "Mark Jones"
    ["type"]=>
    string(1) "2"
    ["captain"]=>
    string(1) "0"
    ["pos"]=>
    string(1) "1"
  }
  [1]=>
  array(9) {
    ["id"]=>
    string(3) "282"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(2) "11"
    ["id_person"]=>
    string(3) "311"
    ["name"]=>
    string(10) "Jack Jones"
    ["type"]=>
    string(1) "2"
    ["captain"]=>
    string(1) "0"
    ["pos"]=>
    string(1) "4"
  }
  [2]=>
  array(9) {
    ["id"]=>
    string(3) "273"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(1) "4"
    ["id_person"]=>
    string(3) "302"
    ["name"]=>
    string(12) "Eddie Taylor"
    ["type"]=>
    string(1) "2"
    ["captain"]=>
    string(1) "0"
    ["pos"]=>
    string(1) "6"
  }
  [3]=>
  array(9) {
    ["id"]=>
    string(3) "270"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(1) "2"
    ["id_person"]=>
    string(3) "299"
    ["name"]=>
    string(13) "Jonas Haverla"
    ["type"]=>
    string(1) "2"
    ["captain"]=>
    string(1) "0"
    ["pos"]=>
    string(2) "10"
  }
}

Array two ($homeabsences)

array(5) {
  [0]=>
  array(7) {
    ["id"]=>
    string(3) "265"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(1) "1"
    ["id_person"]=>
    string(3) "294"
    ["name"]=>
    string(13) "Harry Jackson"
    ["type"]=>
    string(1) "1"
  }
  [1]=>
  array(7) {
    ["id"]=>
    string(3) "269"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(1) "2"
    ["id_person"]=>
    string(3) "311"
    ["name"]=>
    string(10) "Jack Jones"
    ["type"]=>
    string(1) "1"
  }
  [2]=>
  array(7) {
    ["id"]=>
    string(3) "288"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(2) "14"
    ["id_person"]=>
    string(3) "302"
    ["name"]=>
    string(12) "Eddie Taylor"
    ["type"]=>
    string(1) "1"
  }
  [3]=>
  array(7) {
    ["id"]=>
    string(3) "286"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(2) "14"
    ["id_person"]=>
    string(3) "315"
    ["name"]=>
    string(12) "Terry Barnes"
    ["type"]=>
    string(1) "2"
  }
  [4]=>
  array(7) {
    ["id"]=>
    string(3) "277"
    ["id_club"]=>
    string(2) "44"
    ["id_season"]=>
    string(1) "2"
    ["position"]=>
    string(1) "8"
    ["id_person"]=>
    string(3) "366"
    ["name"]=>
    string(14) "Jerry O'Donald"
    ["type"]=>
    string(1) "7"
  }
}

我当前的（更新的）代码（不起作用）：

{foreach item=player from=$homesquad}
{if $player.pos == $count}  (filtering the first array based on pos value)

{if in_array("id_person",$homeabsences)}
Do X.
{else}
Do Y.
{/if}
{/if}
{/foreach}

Answer 1

使用 PHP 函数 array_intersect 获取在第一个数组和第二个数组中找到的值。试试这个代码：

<?php

//First array
$homesquad = array(
    array(
        "id" => "270",
        "id_club" => "44",
        "id_season" => "2",
        "position" => "8",
        "id_person" => "306",
        "name" => "Mark Jones",
        "type" => "2",
        "captain" => "0",
        "pos" => "1"
    ),
    array(
        "id" => "273",
        "id_club" => "44",
        "id_season" => "2",
        "position" => "4",
        "id_person" => "302",
        "name" => "Eddie Taylor",
        "type" => "2",
        "captain" => "0",
        "pos" => "6"
    )
);

//Second array
$homeabsences = array(
    array(
        "id" => "277",
        "id_club" => "44",
        "id_season" => "2",
        "position" => "8",
        "id_person" => "366",
        "name" => "Jerry O'Donald",
        "type" => "2",
        "captain" => "0",
        "pos" => "1"
    ),
    array(
        "id" => "273",
        "id_club" => "44",
        "id_season" => "2",
        "position" => "4",
        "id_person" => "302",
        "name" => "Eddie Taylor",
        "type" => "2",
        "captain" => "0",
        "pos" => "6"
    )
);

//get intersection between $homesquad and $homeabsences
$id_persons =  array_intersect(
    array_column($homesquad, 'id_person'), 
    array_column($homeabsences, 'id_person')
);

if($id_persons)
    print_r($id_persons); //this will display the intersection of two arrays
else
    echo "no matches"
?>

Answer 2

要在数组中查找 id_person 的所有值，请使用 array_column 函数。然后你可以发现它是否重叠：

array_intersect(
    array_column($homesquad, 'id_person'), 
    array_column($homeabsences, 'id_person')
)

或者对于单个值

in_array($player['id_person'], array_column($homeabsences, 'id_person'))