接口签名方法php

<?php
function generateSignature($params, $secretKey) {
    // 将参数按照键名排序
    ksort($params);
    
    // 拼接参数
    $str = '';
    foreach ($params as $key => $value) {
        $str .= "&$key=$value";
    }
    
    // 去掉开头的"&"
    $str = substr($str, 1);
    
    // 使用HMAC-SHA256算法生成签名
    $signature = hash_hmac('sha256', $str, $secretKey);
    
    return $signature;
}

// 示例参数
$params = [
    'user_id' => '12345',
    'timestamp' => time(),
    'nonce' => uniqid()
];

// 密钥
$secretKey = 'your_secret_key';

// 生成签名
$signature = generateSignature($params, $secretKey);

echo "Generated Signature: " . $signature;
?>