Creating install script form custom web app - php

Question

I'm looking for option to make install.php where user puts all needed data e.g. db host, db username, db pwd etc. Script must put it to php class called config.
public function __construct(){
$this->site_address = '';
$this->db_prefix = '';
$this->site_desc = '';
$this->site_title = '';
$this->hash = '';
$this->sidebar = false;
$this->db_host = '';
$this->db_name = '';
$this->db_pass = '';
$this->db_user = '';
$this->db_port = 3306;
$this->folder = NULL;
$this->mailserver = '';
$this->mailport = '';
$this->mailuser = '';
$this->mailpassword ='';
}
How to put data from form on install.php page to this class constructor?
I was thinking about getting content->find $this->db_host = and replace '' for '.$_POST['db_host'].' from form and then put content to file and save, but I don't know how exactly do that. Please help.

Answer 1

Simply add variable to your __construct()
public function __construct($site_address='',$db_prefix='',$site_desc='',$site_title='',$hash='',$sidebar=false){
$this->site_address = $site_address;
$this->db_prefix = $db_prefix;
$this->site_desc = $site_desc;
$this->site_title = $site_title;
$this->hash = $hash;
$this->sidebar = $sidebar;
// And so on
}
Then from your form you do a new yourAwesomeClassName('http://hello','$_POST['db_prefix']',...)
Don't forget few things:
Never trust user input
Sanitize/check all your data/inputed format before using them
Don't save passwords in plain text, at least hash them, better would be using a salt in addition to that of course.
Update according to comment
(The following may not be a good practice but I'm open to suggestions as this is part of my current work)
If you need to save your data I suggest you to have a generic file for example ...
Generic file
Source
class Database
{
/**
* Database host
* #var string Default: 'your-database-host'
*/
const DB_HOST = 'your-database-host';
/**
* Database name
* #var string Default: 'your-database-name'
*/
const DB_NAME = 'your-database-name';
// And so on
}
Then you need a function that writes your data
Write default data
Source
public static function writeDatabaseConfig($data)
{
if (is_array($data)) {
$root = static::getRoot();
$databaseFile = $root . 'App' . DIRECTORY_SEPARATOR . 'Config' . DIRECTORY_SEPARATOR . 'Database.php';
$currentFile = file_get_contents($databaseFile);
if (strpos($currentFile, 'your') !== false) {
$oldToNew = array(
'host' => 'your-database-host',
'name' => 'your-database-name',
);
foreach ($oldToNew as $key => $value) {
if (isset($data[$key])) {
$currentFile = str_replace($value, $data[$key], $currentFile);
}
}
if (file_put_contents($databaseFile, $currentFile)) {
return true;
}
return false;
}
return false;
}
return false;
}
At the end in your __construct() you only need to call writeDatabaseConfig() to write your data. Once done you can get your information by calling ConfigClass::DB_HOST for example ...