重写规则htaccess-如何获取用法的查询字符串

http://mywebsite.com/cars/BMW/

http://mywebsite.com/List.php?categories=/cars/BMW/

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]*)/$ /List.php?categories=$1 [L]

RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{QUERY_STRING} ^categories=(.*)
RewriteRule .* /List.php?categories=$1 [L]

echo $_GET[\'categories\'];

/cars/BMW

$_GET[\'categories\']

explode()

/

if (isset($_GET[\'categories\']))
{
  $parts = explode(\"/\", $_GET[\'categories\']);
  $vehicle_type = $parts[0];
  $vehicle_make = $parts[1];

  echo $vehicle_type . \" \";
  echo $vehicle_make;
}