namespace ConnexControl;

use \PDO ;

class BDD
{

  private  $dbh;
  private  $host ;
  private  $dbname ;
  private  $username ;
  private  $password ;

  public function __construct($dbname, $host = "localhost",  $username = "root", $password = "root"){

      $this->dbname = $dbname;
      $this->host = $host;
      $this->username = $username;
      $this->password = $password;
  }

  public function getPDO(){
    try
    {
      $dbh = new PDO("mysql:dbname=$this->dbname;host=$this->host; charset=utf8", $this->username, $this->password);
      $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $this->dbh = $dbh;
    }
    catch (PDOException $e)
    {
      $msg = 'ERREUR PDO dans ' . $e->getFile() . ' L.' . $e->getLine() . ' : ' . $e->getMessage();
      die($msg);
    }
    return $this->dbh;
  } // fin getPDO

class BDD {
	PRIVATE PDO $dbh;
	private string $host = "localhost";
	private string $dbname = "";
	private string $username = "root";
	private string $password = "root";
	public function __construct(){
		try {
			$this->dbh = new PDO("mysql:host=$this->host;dbname=$this->dbname", $this->username, $this->password);
			$this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
		} catch(PDOException $e) {
			die('Connexion failed : '.$e->getMessage());
		}
	}
	public function getConnection(){
		return $this->dbh;
	}
}

$BDD = new BDD();
$dbh = $BDD->getConnection();

<?php

  function connexion() {

    $servername = "localhost";
    $username = "root";
    $password = "root";
    $dbname= "";

    try{
      $conn = new PDO("mysql:host=$servername;dbname=$dbname;charset=utf8", $username, $password);
echo "connexion effectué";
      return $conn;


    } catch(PDOException $e) {
      echo "Connexion échouée: " . $e->getMessage();
        return false;
        exit();
    }
}

?>