PHP搶多維數組鍵值

Question

我有一個數組，看起來是這樣的：

Array 
(
    [100] => Array 
     (
      [room_id] => 100 
      [name] => Town Center 
     ) 

    [110] => Array 
     (
      [room_id] => 110 
      [name] => Coffee Shop 
      [pin_id] => 7146 
      [pin_x] => 570 
      [pin_y] => 150 
     ) 
) 

我在想，如果有，我能找到一個特定值的鍵的方式，如果「pin_id」價值在那裏。例如：

Array 
(
    [100] => Array 
     (
      [room_id] => 100 
      [name] => Town Center 
     ) 

    [110] => Array     <- I want to get this key "110"    
     (         
      [room_id] => 110   
      [name] => Coffee Shop  
      [pin_id] => 7146   <- Because "pin_id" is here 
      [pin_x] => 570 
      [pin_y] => 150 
     ) 
) 

Answer 1

您必須通過循環傳遞數組並使用array_key_exists。

function makeHappen($argument){ 
    //Array 
    foreach ($argument as $val) { 
     if(array_key_exists($val, $array)){ 
      //if key exists, do something 
     } 
    } 
} 
echo makeHappen('pin_id');