URL routing in PHP Codeigniter
Try this code it might help you :
Here dashboard is the name of controller
//this will route as localhost/appFolder/admin/index $route['admin'] = 'dashboard'; // for your index page//this will route as localhost/appFolder/admin/method_name $route['admin/(:any)'] = 'dashboard/$1';//this will route as localhost/appFolder/admin/method_name/param1$route['admin/(:any)/(:any)'] = 'dashboard/$1/$2';Link the route Like
// for your index page<a href="<?php echo base_url('admin/index'); ?>"></a>// for your other pages<a href="<?php echo base_url('admin/method_name'); ?>"></a>To link the other controller defined just like
<a href="<?php echo base_url('otherControllerName/method_name'); ?>"></a>
school is your ci root, so if you define $route['/school/admin/students'], it will seek school class with admin function, that never exist, instead of admin route.
you should read the documentations first before make any step, https://www.codeigniter.com/userguide3/general/routing.html