<?php

class DBConnect {

    private static $instance;
    private $DB_USER;
    private $DB_PASS;
    private $DB_HOST;
    private $DB_CONNECTION;

    private function __contruct(){

        // Trace de débug
        echo "Debug : Instanciation de la classe ".__CLASS__ ;

        // Connexion à la BDD lors de l'instanciation de la classe
        $this->$DB_CONNECTION = $this->connect($this->$DB_HOST, $this->$DB_USER, $this->$DB_PASS);

    }

    private static function getInstance(){
        if( !isset(self::instance)){
            self::$instance = new DBConnect();
        }
        return self::$instance;
    }

    private function connect($username, $host, $password){
        return mysql_connect($username, $host, $password) or die("Echec de la connexion !");
    }

}