此行将解析URL并填充 $ _ GET 数组URL参数：

This line will parse the URL and populate the $_GET array with the URL's parameters:

parse_str(substr(strrchr($_SERVER['REQUEST_URI'], "?"), 1), $_GET);

然后可以像访问数组一样访问它，例如：

It can then be accessed as you would normally access an array, for example:

$ref = $_GET['ref'];

您应设置 - application / config / config.php 如下：

You config - application/config/config.php - should be set as follows:

$config['uri_protocol'] = "PATH_INFO";