<?php
namespace app\api\controller;
class Kuaishou
{
    // md5 签名
    public static function md5Sign($param,$signSecret)
    {
        $param = [
            'appkey'=> '',
            'timestamp'=> '',
            'access_token'=> '',
            'version'=> 1,
            'param'=> json_encode(['user_id'=>1,'order_num'=>'123456']),
            'method' => 'MD5',
        ];
        $paramStr = '';
        ksort($param);
        foreach ($param as $kk=>$vv) {
            if($vv != null && 'null' != $vv)
            {
                $paramStr .=$kk.'='.$vv.'&';
            }
        }
        $unSignParaString = '';
        if(strlen($paramStr)> 0) $unSignParaString = substr($paramStr,0,strlen($paramStr) - 1);
        return  md5($unSignParaString.'&signSecret='.$signSecret);
    }
    // 2.HMAC_SHA256(官方推荐)
    public static function HMAC_SHA256Sign($param,$signSecret){
        $paramStr = "";
        ksort($param);
        foreach ($param as $kk=>$vv){
            if (null != $vv && "null" != $vv) {
                $paramStr .= $kk . "=" . $vv . "&";
            }
        }
        $unSignParaString = '';
        if (strlen($paramStr) > 0) {
            $unSignParaString = substr($paramStr, 0, strlen($paramStr) - 1);
        }
        $unSignParaString = $unSignParaString."&signSecret=" . $signSecret;
        $signStr = base64_encode(
            hash_hmac(
                'sha256',
                $unSignParaString,
                $signSecret,
                true
            )
        );
        return $signStr;
    }

}