php ci框架的使用问题

1.  多级目录路由

application\core\MY_Router.php

重写_validate_request方法

/**
* Validates the supplied segments. Attempts to determine the path to
* the controller.
*
* @access private
* @param array
* @return array
*/

function _validate_request($segments)
{


if (count($segments) == 0)
{
return $segments;
}
// Does the requested controller exist in the root folder?
if (file_exists(APPPATH.'controllers/'.ucfirst($segments[0]).'.php'))
{
return $segments;
}

// Is the controller in a sub-folder?
if (is_dir(APPPATH.'controllers/'.$segments[0]))
{
$temp = array('dir' => array(), 'path' => APPPATH.'controllers/');

foreach($segments as $k => $v)
{
$temp['path'] .= $v.'/';

if(is_dir($temp['path']))
{
$temp['dir'][] = $v;
unset($segments[$k]);
}
}

$this->set_directory(implode('/', $temp['dir']));
$segments = array_values($segments);
unset($temp);

if (count($segments) > 0)
{
// Does the requested controller exist in the sub-folder?
if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().ucfirst($segments[0]).'.php'))
{
if ( ! empty($this->routes['404_override']))
{
$x = explode('/', $this->routes['404_override']);

$this->set_directory('');
$this->set_class($x[0]);
$this->set_method(isset($x[1]) ? $x[1] : 'index');

return $x;
}
else
{
show_404($this->fetch_directory().$segments[0]);
}
}
}
else
{
// Is the method being specified in the route?
if (strpos($this->default_controller, '/') !== FALSE)
{
$x = explode('/', $this->default_controller);

$this->set_class($x[0]);
$this->set_method($x[1]);
}
else
{
$this->set_class($this->default_controller);
$this->set_method('index');
}

// Does the default controller exist in the sub-folder?
if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.'.php'))
{
$this->directory = '';
return array();
}

}

return $segments;
}


// If we've gotten this far it means that the URI does not correlate to a valid
// controller class. We will now see if there is an override
if ( ! empty($this->routes['404_override']))
{
$x = explode('/', $this->routes['404_override']);

$this->set_class($x[0]);
$this->set_method(isset($x[1]) ? $x[1] : 'index');

return $x;
}


// Nothing else to do at this point but show a 404
show_404($segments[0]);
}

 

 2.数据库的读写分离配置 

      1.将DB.php 在core下面重写

      https://github.com/lvren007/ci3db/blob/master/DB.php