<?php
  class DB{
            private $host = 'localhost';
            private $username = 'root';
            private $password = '';
            private $database = 'toutiyai';
            private $db;

            public function __construct($host=null, $username=null, $password=null, $database=null)
            {
                if($host!= null)
                {
                    $this->host = $host;
                    $this->username = $username;
                    $this->password = $password;
                    $this->database = $database;
                }
                try{
                $this->db = new PDO('mysql:host='.$this->host.' ;dbname='.$this->database, $this->username,
                                    $this->password, array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES UTF8'));
                }catch(PDOException $e){
                    die('<h1>impossible de se connecter a la base de donnee</h1>');
                }
            }


          }

?>