PHP:遍历多维数组并获得搜索元素键的键数组

Question

我试图在多维数组中获得搜索元素的键的数组。例如，我的初始数组是:

$f['Kitchen']['Dishes']['Mantovarka']=3;
$f['Kitchen']['Dishes']['Castrool']=91;
$f['Kitchen']['Dishes']['Separator']=10;
$f['Kitchen']['Product']=18;
$f['Kitchen']['Textile']=19;
$f['Kitchen']['Blue things One']['Juicemaker']=25;
$f['Kitchen']['Blue things One']['Freegener']=13;
$f['Kitchen']['Blue things']['Microwave']=4;
$f['Kitchen']['Blue things']['Iron']=24;

如果我尝试用这个函数获得'Separator'键的键数组:

$index=0; $array =[];
function getArrayOfkeys($needle, $haystack,$original,$array,$index) {
    $index++;
    $exists = false;
    if(is_array($haystack)){
        foreach ($haystack as $key => $val) {
            $array[$index]=$key;
            if($key == $needle){
                $exists = true;
                break;
            }elseif(is_array($val)){
                return getArrayOfkeys($needle, $val,$original,$array,$index);
            }
        }
    }else{
        $index--;
    }
    if($exists==true){
        return $array;
    }
    else{
        // I need here logic!!!    
    }
}

它返回我:

[
    1 => 'Kitchen'
    2 => 'Dishes'
    3 => 'Separator'
]

it is fine!

但是当我试图获得'榨汁机'或'铁'或'产品'的键数组时。它不工作，因为我不能在元素后调用我的getArrayOfkeys()函数:

$f['Kitchen']['Dishes']['Separator']=10;

1. 如何在上述元素之后再次调用?

我想获得"榨汁机"钥匙['Kitchen', 'Blue things One', 'Juicemaker']。

对于'Product'键['Kitchen','Product']。

For 'Iron' key ['Kitchen', 'Blue things','Iron']

我的功能对我来说似乎非常未优化，请帮助我，优化它。

Answer 1

请尝试此功能:

function findKeyPath($arr, $key, $path = '') {
    foreach($arr as $k => $value) {
        if(is_array($arr[$k])) {
            $ret = findKeyPath($arr[$k], $key, $path.$k.',');
            if(is_array($ret)) {
                return $ret;
            }
        }else if($k == $key) {
            return explode(',', $path.$key);
        }
    }
    return null;
}
print_r(findKeyPath($f, 'Juicemaker'));
//Output: Array ( [0] => Kitchen [1] => Blue things One2 [2] => Juicemaker )

演示:

https://3v4l.org/YJD7q