问PHP日志出现Cannot use a scalar value as an array 错误警告？

$notValveForKey[$key]='app='.APP_NAME.'&mod='.MODULE_NAME.'&act='.ACTION_NAME;

function L($key,$data = array()){

    $key = strtoupper($key);

     if(!isset($GLOBALS['_lang'][$key])){

         $notValveForKey = F('notValveForKey', '', DATA_PATH.'/develop');

         if($notValveForKey==false){

           $notValveForKey = array();

         }

         if(!isset($notValveForKey[$key])){

           *$notValveForKey[$key] = '?app='.APP_NAME.'&mod='.MODULE_NAME.'&act='.ACTION_NAME;*

         }

         F('notValveForKey', $notValveForKey, DATA_PATH.'/develop');

          return $key;

     }

     if(empty($data)){

          return $GLOBALS['_lang'][$key];

     }

     $replace = array_keys($data);

     foreach($replace as &$v){

        $v = "{".$v."}";

     }

     return str_replace($replace,$data,$GLOBALS['_lang'][$key]);

}