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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>DB</title>
</head>
<body>


<?php

    $host = 'localhost';
    $user = 'root';
    $pass = 'верный';
    $db_name ='test_db' ;
    $table = 'people';

    $link = mysqli_connect($host, $user, $pass, $db_name);

    $query = "SELECT*FROM $table WHERE id>0";

    mysqli_connect($host, $user, $pass, $db_name) or die (mysqli_error($link));
    mysqli_query($link, $query);
    $res = mysqli_connect($link, $query) or die(mysqli_error($link));
    $data = mysqli_fetch_assoc($res);
    var_dump($data);

    ?>

</html>