PHP and MySQL Database Connection Using OOP Approach

I this tutorial article I would like to share with you a code on how to connect PHP and MySQL database using mysqli object-oriented programming connection.

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Program Listing

connectdb.php

<?php

    $host="localhost";
    $username="root";
    $password="12345";
    $database="payroll";

    $conn=new mysqli ($host,$username,$password,$database);
    if ($conn->connect_error)
    {
        die ("failed to connect".$conn->connect_error);
    }

?>