PHP函数参数不能正常工作？

Question

I'm trying to set up a website using MVC, but I'm stuck at the very beginning.

In project0/application/controllers I have a pages.php file which looks like:

<?php

class Pages extends CI_Controller {

public function view($page = 'home')
{

if (!file_exists('application/views/pages/'.$page.'.php'))
{
    // Whoops, we don't have a page for that!
    show_404();
}

$data['title'] = ucfirst($page); // Capitalize the first letter

$this->load->view('templates/header', $data);
$this->load->view('pages/'.$page, $data);
$this->load->view('templates/footer', $data);

}
}

and in project0/application/views/pages two files named home.php and about.php, containing a "Hello world".

When I want to visit http://project0/index.php/pages/view/about , it gives me the 404 error: it seems the home.php or about.php files are not existing.

Can somebody help me out?

Answer 1

In your script, try a getcwd(); and then double check the results from that (your current working directory) against the relative path 'application/views/pages/'.$page.'.php' . I would guess that you're not looking for your page in the directory you think you are.

Answer 2

You just solved your own error. Your pages home.php and about.php are located in: project0/application/views

But the code you posted is looking for them in

project0/application/views/pages/

Answer 3

I think whether your code will work depends on your setup (server setup and where your actual script runs from), but you can use one of several methods to make it more foolproof.

You can use the getcwd() function:

if (!file_exists(getcwd().'application/views/pages/'.$page.'.php'))

Or you can define a permanent site path in your main config files, for instance:

$config['path'] = '/home/project0/';

...

if (!file_exists($config['path'].'application/views/pages/'.$page.'.php'))

Answer 4

尝试指定绝对路径，而不是相对的'application/views/pages/'.$page.'.php'它可能无法正常工作。

Answer 5

You are probably checking for the file in the wrong place, I believe file_exists is looking for that path relative to project0/application/controllers . Try this:

if (!file_exists('../views/pages/'.$page.'.php'))