CodeIgniter allows the controller to support the Router class library of multiple levels of subdirectories

My_router.php put in the System/application/libraries directory, you can let CI controller support multilevel subdirectory.
In this way, you can place more levels of directory in the System/application/controllers directory, Access is index.php/directory 1/Directory 2/Directory 3/Controller/method/Parameters
Please note that you do not need load, because this class is automatically load by the system.

my_router.php Code

<?phpif( !defined(' BasePath '))Exit(' No Direct script access allowed ');/** * Custom Routing class * * Let CI controller support multilevel directory * * @author sohocn.net * @copyright copyright©2012-2018 www.sohocn.net all Righ TS reserved. * @created 2012-12-13 * @updated 2012-12-13 * @version 1.0*/ classMy_routerextendsci_router{/** Set The directory name * * @access public * @param string * @return void*/    functionSet_directory ($dir)    {        $this->directory =$dir.‘ /‘; }     /** * 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 $segments; }         //Does The requested controller exist in the root folder?        if(file_exists(APPPATH. ' Controllers/'.$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/'.$this->fetch_directory ().$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 $segments; }          //If we ' ve gotten this far it means, the URI does not correlate to a valid//controller class. We 'll now see if there are an override        if( !Empty($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 $x; }          //Nothing else to does at this point but show a 404show_404 ($segments[0]); }}//END my_router Class 

CodeIgniter allows the controller to support the Router class library of multiple levels of subdirectories