require_once的特性

$conf=require_once ‘conf.php‘;

 function get_config($key){      //$conf=require_once ‘conf.php‘;  不可取
   //  $config = call_user_func( function() { return require_once ‘conf.php‘; }); 匿名也不可取
  global $conf;
    return $conf[$key];
  }
echo get_Config(‘name‘);

echo get_Config(‘age‘);

conf.php文件return $config=array(                ‘name‘=>‘hk‘,                ‘age‘=>‘22‘               );