Global PHP Database File - php

Question

I'm currently making a PHP script and I need some help. Firstly it allows the user to enter database information on a file called install.html which presents a form to the user. The form uses GET to then send that information to a second install file which creates the relevant tables, enters the information into the tables and then allows the user to carry on with the script.
However I was wondering. In the second install file I used:
$databaseServer = $_GET["databaseServer"];
in order to get the information that was entered into the form. Is there anyway I can then send these variables ($databaseServer, $databaseName, $databaseUser, $databasePassword) to another file called db.php that I will include on top of every file I write that requires an SQL connection. I have looked at GLOBAL variables but they didn't work properly. I could have been doing something wrong however.

Answer 1

You could save a configuration array to a file:
<?php
class Config
{
public $path;
public function __construct($path)
{
$this->path = $path;
}
public function store($config)
{
$dump = var_export($config, true);
$dump = '<?php return ' . $dump . ';';
file_put_contents($this->path, $dump);
}
public function retrieve()
{
return include $this->path;
}
}
// Build your config array
$config['database'] = $_GET['database'];
$config['username'] = $_GET['username'];
// Make sure your server can write to this path
$configurator = new Config(__DIR__ . '/config/config.php');
// Save your config
$configurator->store($config);
// Get your config later
$read_config = $configurator->retrieve();
// Check our config against the saved version
assert($config == $read_config);
var_dump($read_config);