elmelegy

<?php
class con
{
    public $con;
    public function __construct(){
        $this->con = mysqli_connect('localhost', 'root', '', 'whatsapp');

        if($this->con){echo 'Connection <br/>';}else{echo 'Problem Connection <br/>';}

        if (mysqli_connect_errno())

elmelegy

<?php
// هذا الأمر ينجح
$dbNew = mysqli_connect('localhost','root','','whatsapp');
    $t = mysqli_query($dbNew,$r);

    if ($t) {
        echo 'ok';
    } else {
        echo 'no';
    }

elmelegy

<?php

class con
{
    public $con;
    public function __construct(){
        $con = mysqli_connect('localhost', 'root', '', 'whatsapp');

        if($con){echo 'Connection <br/>';}else{echo 'Problem Connection <br/>';}