判断指指定值输出！该如何解决

$n=$_GET['che'];
define("A", $n);
if(A==star){echo '1';}
else if(A==movie){echo '9';}
else if(A==tv){echo '10';}
else if(A==yue){echo '10';}
else if(A==zongyi){echo '12';}
else if(A==news){echo '15';}
else if(A==yanchu){echo '13';}
else if(A==fashion){echo '20';}
else if(A==astro){echo '23';}

在这里弄个  统一的值

$dict = array(
  'star' => '1',
  'movie' => '9',
  'tv' => '10',
  'yue' => '10',
  'zongyi' => '12',
  'news' => '15',
  'yanchu' => '13',
  'fashion' => '20',
  'astro' => '23',
);
echo isset($dict[$_GET['che']]) ? $dict[$_GET['che']] : ''