PHP의 얼굴 인식에 대한 초보자 가이드

$api_key = "your api_key";
$api_secret = "your api_secret";
$image_file = "test.jpg";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://api-cn.faceplusplus.com/facepp/v3/detect");
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, [
    "api_key" => $api_key,
    "api_secret" => $api_secret,
    "image_file" => new CURLFile($image_file),
    "return_attributes" => "gender,age"
]);
$result = curl_exec($ch);
curl_close($ch);

echo $result;

$result = json_decode($result, true);
if($result && isset($result["faces"])) {
    foreach($result["faces"] as $face) {
        print_r($face["attributes"]);
    }
}

//提取人脸特征值
function extract_feature($image_file) {
    $api_key = "your api_key";
    $api_secret = "your api_secret";

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "https://api-cn.faceplusplus.com/facepp/v3/face/analyze");
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, [
        "api_key" => $api_key,
        "api_secret" => $api_secret,
        "image_file" => new CURLFile($image_file),
        "return_landmark" => 1,
        "return_attributes" => "gender,age,smiling,headpose,eyestatus,ethnicity,beauty"
    ]);
    $result = curl_exec($ch);
    curl_close($ch);

    $result = json_decode($result, true);
    if($result && isset($result["faces"])) {
        foreach($result["faces"] as $face) {
            return $face["face_token"];
        }
    }
    return null;
}

//保存人脸特征值到数据库中
function save_feature($feature, $user_id) {
    $pdo = new PDO("mysql:host=localhost;dbname=test", "root", "123456");
    $stmt = $pdo->prepare("INSERT INTO face_feature(user_id, feature) VALUES(?, ?)");
    $stmt->bindValue(1, $user_id);
    $stmt->bindValue(2, $feature);
    $stmt->execute();
}

$image_file = "test.jpg";
$user_id = 1;

$feature = extract_feature($image_file);
if($feature) {
    save_feature($feature, $user_id);
}