PHP 개발에서 Baidu Wenxinyiyan의 문장 분류 표시를 구현하는 방법은 무엇입니까?

CREATE TABLE `categories` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

CREATE TABLE `sentences` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `content` varchar(255) NOT NULL,
  `category_id` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  CONSTRAINT `fk_sentences_categories` FOREIGN KEY (`category_id`) REFERENCES `categories` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;

INSERT INTO `categories` (`name`) VALUES ('爱情');
INSERT INTO `categories` (`name`) VALUES ('友情');
INSERT INTO `categories` (`name`) VALUES ('励志');

INSERT INTO `sentences` (`content`, `category_id`) VALUES ('爱情句子1', 1);
INSERT INTO `sentences` (`content`, `category_id`) VALUES ('爱情句子2', 1);
INSERT INTO `sentences` (`content`, `category_id`) VALUES ('友情句子1', 2);
INSERT INTO `sentences` (`content`, `category_id`) VALUES ('友情句子2', 2);
INSERT INTO `sentences` (`content`, `category_id`) VALUES ('励志句子1', 3);
INSERT INTO `sentences` (`content`, `category_id`) VALUES ('励志句子2', 3);

<?php

$host = 'localhost';
$db = 'your_database_name';
$user = 'your_username';
$password = 'your_password';

$dsn = "mysql:host=$host;dbname=$db;charset=utf8mb4";

try {
    $pdo = new PDO($dsn, $user, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
    echo 'Connection failed: ' . $e->getMessage();
    exit;
}

<?php

$sql = 'SELECT * FROM `categories`';
$categories = $pdo->query($sql)->fetchAll(PDO::FETCH_ASSOC);

foreach ($categories as $category) {
    echo '<h2>' . $category['name'] . '</h2>';
    
    $sql = 'SELECT * FROM `sentences` WHERE `category_id` = ' . $category['id'];
    $sentences = $pdo->query($sql)->fetchAll(PDO::FETCH_ASSOC);
    
    echo '<ul>';
    foreach ($sentences as $sentence) {
        echo '<li>' . $sentence['content'] . '</li>';
    }
    echo '</ul>';
}