project/app/Service/EncryptService.php

<?php

namespace App\Service;

class EncryptService extends Service{

    //加密
    public static function sign($data){
        $str = [];
        ksort($data);
        foreach ($data as $k=>$v){
            $str[] = $k.'='.trim($v);
        }

        $vaild = implode(',',$str).'doTAKtnpiG';
        file_put_contents('sign.txt',$vaild.PHP_EOL,8);
        file_put_contents('sign.txt',md5($vaild).PHP_EOL,8);

        return md5($vaild);
    }
}