PHP实现签名

<?php
declare(strict_types=1);

function signature(array $params, string $body, string $clientSecret): string
{
    ksort($params);
    $stringToBeSigned = $clientSecret;
    foreach ($params as $key => $value) {
        $stringToBeSigned .= $key . $value;
    }
    unset($key, $value);
    $stringToBeSigned .= $body;
    $stringToBeSigned .= $clientSecret;
    return md5($stringToBeSigned);
}

$clientId = "clientId";
$clientSecret = "clientSecret";

$params = [
    "Accept" => "application/json",
    "Content-Type" => "application/json",
    "Method" => "taobao.tbk.tpwd.create",
    "Timestamp" => time()
];

$body = json_encode([
    "url" => "https://s.click.taobao.com/FUYXmNu"
]);

$params["Authorization"] = "Basic " . base64_encode($clientId . ":" . signature($params, $body, $clientSecret));


$headers = [];
foreach ($params as $name => $value) {
    $headers[] = $name . ": " . $value;
}

$options = [
    CURLOPT_URL => "https://union.lottefuture.com/gateway",
    CURLOPT_HTTPHEADER => $headers,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => $body,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_SSL_VERIFYHOST => false
];

$handle = curl_init();
curl_setopt_array($handle, $options);
$response = curl_exec($handle);
$info = curl_getinfo($handle);
if ($response === false) exit(curl_error($handle));
curl_close($handle);

$response = json_decode($response, true);
if ($info["http_code"] != 200) exit($response["message"]);

var_dump($response);