如何检查 php 中的两个数组

Question

这里我在结构下面有两个数组

$a = [
    "100" => ["name" => "1 A"],
    "200" => ["name" => "1 B"],
    "300" => ["name" => "1 C"],
    "400" => ["name" => "1 D"],
];

$b = [
    "user1" => ["100" , "200"],
    "user2" => ["100" , "300"],
    "user3" => ["100" , "200","400"],
];

现在让我们以 $b user1 的值为 100 和 200 为例，现在要检查 $a 的值 100 表示名称，200 表示名称？

根据我的数组记录，100 表示值是 "name" => "1 A" & 200 是 "name" => "1 B"

My expected answer

Array
(
    [user1] => Array
        (
            [0] => 1 A
            [1] => 1 B
        )

    [user2] => Array
        (
            [0] => 1 A
            [1] => 1 C
        )

    [user3] => Array
        (
            [0] => 1 A
            [1] => 1 B
            [2] => 1 D
        )

)

Answer 1

您可以使用foreach

$r = [];
foreach($activeGroups as $k => $v){
  foreach($v as $ik => $iv){
    $r[$k][] = $teacherActiveGroupNameData[$iv]['name'];
  } 
}

https://3v4l.org/vnUtc

Answer 2

array_walk() and array_map() 可能会对您有所帮助。 array_walk() 是对 $activeGroups 数组进行迭代，array_map() 是从 $teacherActiveGroupNameData 数组中提取名称。

array_walk($activeGroups, function (&$val) use ($teacherActiveGroupNameData) {
    $val = array_map(function ($val) use ($teacherActiveGroupNameData) {
        return $teacherActiveGroupNameData[$val]['name'];
    }, $val);
});

echo '<pre>', print_r($activeGroups);

工作demo。

如何检查 php 中的两个数组

How to check two array in php

php

php-7