If I have a config.php file with variables in it like so...
config.php:
$cnf['dbhost'] = "0.0.0.0";
$cnf['dbuser'] = "mysqluser";
$cnf['dbpass'] = "mysqlpass";
How can I then access these variables from a class which is in another file, such as...
inc/db.class.php:
class db() {
function connect() {
mysql_connect($cnf['dbhost'], $cnf['dbuser'], $cnf['dbpass']);
}
}
$db = new db();
So, I can use the class in another file such as...
index.php:
<html>
<?php
include('config.php');
include('inc/db.class.php');
$db->connect();
?>
</html>
Include config file with include, require or require_once at the beginning of your db script. You will also need to specify $cnf as global in the function you want to use, otherwise you cannot access global variables:
include "../config.php";
class db() {
function connect() {
global $cnf;
mysql_connect($cnf['dbhost'], $cnf['dbuser'], $cnf['dbpass']);
}
}
$db = new db();
EDIT: On big project I prefer to use a boot.php where I include all the php files, so I wont need to include in every file everything I need. Having this, I just need to include the boot into the index.php and have to disposition all the definitions. It's slightly slower but really comfortable.
Just include config.php in your inc/db.class.php.
EDIT (answering the query asked in comment)
What you could do is have a init.php like the following,
include('config.php');
include('db.class.php');
include('file.php');
So your classes will be able to access variables from config.php. And now for your index.php you only need to include init.php and all your classes, config, etc. will be included.