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PHP Tutorial: Step-by-Step Guide to Implement Baidu Face Recognition

gitbox 2025-06-15

1. Introduction

Face recognition is a key technology in computer vision that enables identifying individuals by comparing face images. Baidu AI Open Platform offers powerful and easy-to-use face recognition APIs. Developers can leverage PHP to call these APIs and build a variety of face recognition applications.

2. Preparation

Before starting, you need to complete several preparation steps: register a Baidu AI Open Platform account, create a face recognition application to obtain API Key and Secret Key, and set up the PHP development environment.

2.1 Register a Baidu AI Open Platform Account

Visit Baidu AI’s official website, click the “Register” button, fill in the required information, and complete the registration process to log in.

2.2 Create a Face Recognition Application

After logging in, go to the console, select the “Face Recognition” module, and create a new application by providing the app name and description. Once created, you will receive an API Key and Secret Key. Save these credentials securely for later use.

2.3 Install PHP Development Environment

To call Baidu’s face recognition API, you need to set up a PHP environment. You can use Apache or Nginx as the web server along with the PHP interpreter. Refer to the relevant documentation for detailed installation steps.

3. Calling Baidu Face Recognition API

Now, let’s demonstrate how to use PHP code to call Baidu’s face recognition API to perform face detection.

3.1 Include the SDK

require_once 'AipFace.php';

3.2 Set API Key and Secret Key

$app_id = 'YOUR_APP_ID';
$api_key = 'YOUR_API_KEY';
$secret_key = 'YOUR_SECRET_KEY';

3.3 Create AipFace Instance

$client = new AipFace($app_id, $api_key, $secret_key);

3.4 Call the Face Detection API

$image = file_get_contents('face.jpg');
$result = $client->detect($image);
if ($result['error_code'] === 0) {
    // Face detection succeeded
    $face_num = $result['result']['face_num'];
    echo "Detected {$face_num} face(s)";
} else {
    // Face detection failed
    $error_msg = $result['error_msg'];
    echo "Face detection failed: {$error_msg}";
}

4. Conclusion

This article has introduced how to use PHP to call Baidu’s face recognition API for face detection and identification. With the examples provided, developers can quickly understand how to integrate Baidu’s face recognition interface and build intelligent face recognition applications.

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