PHP：通過多維數組並獲取搜索元素的密鑰數組

Question

我試圖在多維數組中獲取搜索元素的密鑰數組。例如，我最初的數組是：

$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; 

如果我試着去理解 '分離' 利用這個功能鍵鍵的排列：

$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' 
] 

沒事！

但是，當我嘗試獲取'Juicemaker'或'Iron'或'Product'鍵的數組時。它不工作，因爲我不能老是元素之後叫我getArrayOfkeys（）函數：

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

1. 我怎樣才能上述元素之後再打來？

我想獲取'Juicemaker'鑰匙['Kitchen', 'Blue things One', 'Juicemaker']。

對於'產品'鍵['Kitchen','Product']。

對於 '鐵' 鍵['Kitchen', 'Blue things','Iron']

我的功能似乎對我很未優化，幫助我，請與優化。

Answer 1

請試試這個功能：

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

我希望這會幫助你。