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Router类的_set_routing方法
PHP复制代码
function _set_routing ()
{
// Are query strings enabled in the config file? Normally CI doesn't utilize query strings
// since URI segments are more search-engine friendly, but they can optionally be used.
// If this feature is enabled, we will gather the directory/class/method a little differently
$segments = array();
if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
{
if (isset($_GET[$this->config->item('directory_trigger')]))
{
$this->set_directory(trim($this->uri->_filter_uri ($_GET[$this->config->item('directory_trigger')])));
$segments[] = $this->fetch_directory();
}
if (isset($_GET[$this->config->item('controller_trigger')]))
{
$this->set_class(trim($this->uri->_filter_uri ($_GET[$this->config->item('controller_trigger')])));
$segments[] = $this->fetch_class();
}
if (isset($_GET[$this->config->item('function_trigger')]))
{
$this->set_method(trim($this->uri->_filter_uri ($_GET[$this->config->item('function_trigger')])));
$segments[] = $this->fetch_method();
}
}
// Load the routes.php file.
if (defined('ENVIRONMENT') AND is_file(APPPATH .'config/'.ENVIRONMENT .'/routes.php'))
{
include(APPPATH .'config/'.ENVIRONMENT .'/routes.php');
}
elseif (is_file(APPPATH .'config/routes.php'))
{
include(APPPATH .'config/routes.php');
}
$this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
unset($route);
// Set the default controller so we can display it in the event
// the URI doesn't correlated to a valid controller.
$this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);
// Were there any query string segments? If so, we'll validate them and bail out since we're done.
if (count($segments) > 0)
{
return $this->_validate_request ($segments);
}
// Fetch the complete URI string
$this->uri->_fetch_uri_string ();
// Is there a URI string? If not, the default controller specified in the "routes" file will be shown.
if ($this->uri->uri_string == '')
{
return $this->_set_default_controller ();
}
// Do we need to remove the URL suffix?
$this->uri->_remove_url_suffix ();
// Compile the segments into an array
$this->uri->_explode_segments ();
// Parse any custom routing that may exist
$this->_parse_routes ();
// Re-index the segment array so that it starts with 1 rather than 0
$this->uri->_reindex_segments ();
}
复制代码
它先判断了$this->config->item('enable_query_strings') === TRUE的时候才获取并过滤$_GET[$this->config->item('directory_trigger')];过滤调用了URI类的_filter_uri方法($this->uri->_filter_uri),但是这个方法在过滤的时候又必须满足$this->config->item('enable_query_strings') == FALSE,这不是和最开始的为TRUE相反了吗?这是为什么?
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