How does PHP connect to Baidu's natural language sentiment analysis interface?

How does PHP connect to Baidu’s natural language sentiment analysis interface?

Baidu Natural Language Processing (NLP) provides a powerful sentiment analysis interface that can help us determine emotional tendencies based on text content and conduct sentiment analysis. This article will introduce how to use PHP to connect to Baidu's natural language sentiment analysis interface and provide code examples.

First, we need to register an account on the Baidu Developer Platform and create an application to obtain the corresponding API Key and Secret Key. Next, we need to install the baidu-aip SDK.

composer require baidu-aip/php-sdk

Next, create a sentiment_analysis.php file and introduce Baidu AI SDK:

require_once 'vendor/autoload.php';

use AipNlpAipNlp;

// 在百度AI开发者平台创建应用后获取到的API Key和Secret Key
const APP_ID = 'your_app_id';
const API_KEY = 'your_api_key';
const SECRET_KEY = 'your_secret_key';

$client = new AipNlp(APP_ID, API_KEY, SECRET_KEY);

Next, we can write a function to call the sentiment analysis interface . Here is an example function:

function analyzeSentiment($text) {
    global $client;

    $result = $client->sentimentClassify($text);

    if(isset($result['items'])) {
        // 获取情感分析结果
        $sentiments = $result['items'][0]['sentiment'];

        switch($sentiments) {
            case 0:
                $sentiment = "负面";
                break;
            case 1:
                $sentiment = "中性";
                break;
            case 2:
                $sentiment = "正面";
                break;
            default:
                $sentiment = "未知";
                break;
        }

        return $sentiment;
    }

    return "未知";
}

Next, we can test the above function in the main function. Here is an example:

$text = "今天天气真好！";

$sentiment = analyzeSentiment($text);

echo "文本：".$text."<br/>";
echo "情感分析结果：".$sentiment."<br/>";

Finally, we can run the PHP file in the command line and view the output. If everything goes well, you will see the following output:

文本：今天天气真好！
情感分析结果：正面

Through the above steps, we successfully used PHP to connect to Baidu's natural language sentiment analysis interface and conducted a simple sentiment analysis.

Summary:
This article introduces how to use PHP to connect to Baidu's natural language sentiment analysis interface, and provides relevant code examples. By using Baidu AI SDK and related functions, we can easily perform sentiment analysis in our PHP applications. This feature can help us better understand users’ emotional tendencies and make more targeted decisions.

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