[PHP] PHP7에서 mysqli 사용하기

<?php
$conn = mysqli_connect("localhost","아이디","데이터베이스비번","데이터베이스명");
$query = "select * from member";
$result = mysqli_query($conn,$query);
$row = mysqli_fetch_array($result);

echo $row['출력한 컬럼의 값'];

mysqli_close($conn);
?>