How to trim current filename of page from URL? - php

Question

I have a method, it looks like this:
private function setURL()
{
$pageURL = 'http';
if(isset($_SERVER["HTTPS"]) && $_SERVER['HTTPS'] == "on")
{
$pageURL .= "s";
}
$pageURL .= "://";
if($_SERVER["SERVER_PORT"] != "80")
{
$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
}
else
{
$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
}
if(substr($pageURL, -4) == ".php")
{
// damn. this is harder to recover from.
$len = strlen(basename(__FILE__, '.php'));
$len = strlen($pageURL) - $len;
$pageURL = substr($pageURL, 0, $len);
}
if(substr($pageURL, -1) != "/")
{
$pageURL .= "/";
}
$this->url = $pageURL;
}
If a user doesn't enter a filename, the URL returned is as expected, http://localhost/zenbb2. If the user does, however, the URL returned is wrong in some way, no matter what permutation I try to perform. For instance, this code returns http://localhost when visiting http://localhost/zenbb2/index.php, but http://localhost/zenbb2 when visiting that URL.
Edit The contents of my .htaccess file are:
Options -indexes
RewriteEngine on
Also, I mean the current URL as in, if I were visiting http://localhost/zenbb2/index.php, it would trim the index.php from the URL so I can use it in various places in my code. Ideally, in the end, I could use it like this:
$url = 'http://localhost/zenbb2';
echo "<link rel=\"{$url}/sample.css\" />"; // http://localhost/zenbb2/sample.css

Answer 1

You can use dirname to achieve this:
$ php -a
> $url = 'http://localhost/zenbb2/index.php';
> echo dirname($url);
http://localhost/zenbb2
Edit:
dirname always strips the last part of the string so use care to ensure you don't strip too much off but it can be useful when traversing URL or directory paths.

Answer 2

A better solution is to create a php file config.php then specify constants within it, after that, include the file everytime you want to use the URL. This solution is also implemented in well-known frameworks such as Codeigniter.
This approach is better, and frankly, more stable. For example, if you have a php file in a sub-directory (/zenbb2/sub/file.php) the URL directory would be zenbb2/sub, which, obviously, isn't what you're looking for, and your static files will return 404, since they don't exist there.

Answer 3

Try this one
$url = $_SERVER['REQUEST_URI'];
echo basename($url);
This should give index.php from http://localhost/zenbb2/index.php