php - 使用 mysqli 类在 PHP 中返回 MySQL 查询

Question

我似乎正在连接到 MySQL 数据库，但无法使用 mysqli 类返回查询。我已经做了一些搜索，我编写的代码应该返回结果，但我遗漏了一些东西。

   <?php

set_include_path('/Applications/MAMP/db/mysql57');

$host = "127.0.0.1";
$user = "admin";
$password = " ";
$bookDatbase = "Books";

$mysqli = new mysqli($host,$user, $password, $bookDatabase);

if ($mysqli->connect_errno) {
    printf("Connect failed: %s\n", $mysqli->connect_error);
    exit();
}

$result = $mysqli->query("SELECT Title FROM Book");

echo $result;

Answer 1

$conn = new mysqli("localhost","username","password","Books");

$result = $conn->query("SELECT Title FROM Book");

if(mysqli_error($conn)){
    echo mysqli_error($conn);
}
else{

    $titles = [];

    while ($r = mysqli_fetch_assoc($result)){
        $titles[] = $r;
    }

    echo "<pre>";
    print_r($titles);
    echo "</pre>";
}