如何获取php中第一次出现的array_walk_recursive的值

Question

I have a deep multidimensional array that I am needing to extract the value of a specific key. I have found that the array_walk_recursive function will be my best option. I only need the first occurrence.

My array looks like this - (except much more complicated)

Array (
    [vehicle info] => Array (
        [one] => Array (
            [submodel] => LX
            [engine] => 2.3
        )
        [two] => Array (
            [color] => blue
            [year] => 2007
            [wheels] => 4
        )
        [three] => Array (
            [submodel] => LX
            [make] => Ford
            [model] => F-150
            [offroad] => No
        )
    )
)

The issue here is, submodel is in both one and three. Additionally, the array is not consistent, so I must use array_walk_recursive to search through it for the matching key, then return the value for that key.

Here is my current code -

array_walk_recursive ($array, (function ($item, $key) {
    $wanted = "submodel";
    if ($key === $wanted) {
        echo ("$key is $item");
    }
}));

The above returns submodel is LXsubmodel is LX.

Bonus Question!! How can I search for multiple keys and return the first corresponding value for each of those? I was thinking putting all wanted keys in an array, then do a foreach loop, but don't quite know how to structure this. I am new to php.

Answer 1

Code:

$array=['vehicle info'=>[
        'one'=>['submodel'=>'LX','engine'=>2.3],
        'two'=>['color'=>'blue','year'=>2007,'wheels'=>4],
        'three'=>['submodel'=>'LX','make'=>'Ford','model'=>'F-150','offroad'=>'No']
    ]
];

$find=['submodel','offroad'];

array_walk_recursive($array,function($v,$k)use($find,&$result){
    if(in_array($k,$find) && !isset($result[$k])){
        $result[$k]="$k is $v";
    }
});
var_export($result);

Output:

array (
  'submodel' => 'submodel is LX',
  'offroad' => 'offroad is No',
)