APPPATH codeigniter doesnt work on server

问题

I have a problem in codeigniter - after I upload it to the server I am requiring a file in a model from libraries folder

<?php
require_once(APPPATH.'libraries/MY_Model.php');
Class scroll_news_model extends MY_model
{
 public function __construct()
 {
    parent::__construct("scroll_news");
 }
}

this code was working fine in my localhost environment but I keep getting this error after I upload it:

Fatal error: require_once() [function.require]: Failed opening required 'application/libraries/MY_Model.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/arab2day/public_html/temp/arab2day/application/models/scroll_news_model.php on line 2

回答1:

If you are trying to extend the CI_Model class, MY_Model.php belongs in the /core directory rather than /libraries, and you don't need to include it - it will be loaded automatically when the base model class is loaded.

This is how extending core classes works, extending regular non-essential "libraries" is slightly different. Read more about it here:

http://codeigniter.com/user_guide/general/core_classes.html

As far as the literal problem goes, Lepidosteus makes a good point about case sensitivity and OS, I've run into this issue myself several times.

回答2:

Check the case of your file names; windows makes no difference between ABC.php and abc.php, but linux does.

来源：https://stackoverflow.com/questions/9242788/apppath-codeigniter-doesnt-work-on-server