PHP - 從JSON打印對象鍵

Question

對不起，我有一個愚蠢的問題，我知道，但我有麻煩，我無法從這個數組打印國家

$array = json_decode('[ 
    { 
     "Afghanistan": { 
      "lang": "en", 
      "browser_code": [] 
     } 
    }, 
    { 
     "Albania": { 
      "lang": "en", 
      "browser_code": [] 
     } 
    }, 
    { 
     "Algeria": { 
      "lang": "en", 
      "browser_code": [] 
     } 
    } 
]'); 

我嘗試：

foreach($array as $key){ 
foreach($key as $k){ 
    echo $k; 
} 
} 

我tryed在使用foreach(){}環路許多方面，但我與邏輯的麻煩，我只是要打印出：

Afghanistan, Algeria, Algeria 

任何線索？

Answer 1

$arrJson = json_decode('[ 
    { 
     "Afghanistan": { 
      "lang": "en", 
      "browser_code": [] 
     } 
    }, 
    { 
     "Albania": { 
      "lang": "en", 
      "browser_code": [] 
     } 
    }, 
    { 
     "Algeria": { 
      "lang": "en", 
      "browser_code": [] 
     } 
    } 
]'); 
foreach($arrJson as $key=>$val){ 
    foreach($val as $k=>$v){ 
    echo $k." , "; 
    } 
} 

Live demo

Answer 2

試試這個：

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