Get data from the MySQL. PHP OOP and functional example

OOP example:

//create a connection
$conn = mysqli_connect('localhost', 'root', 'password', 'testdb');

//write our SQL query to a variable $sql
$sql = "SELECT * FROM Users";

if($result = $conn->query($sql)){//connect to the base

    foreach($result as $row){//iterate elements
        $userid = $row["id"];
        $username = $row["name"];
        $userage = $row["age"];
    }
}

Get data from the database by functional method:

$conn = mysqli_connect('localhost', 'root', 'password', 'testdb');

$sql = "SELECT * FROM Users";

if($result = mysqli_query($conn, $sql)){

    foreach($result as $row){
         
        $userid = $row["id"];
        $username = $row["name"];
        $userage = $row["age"];
    }
}