linux 500内部服务器错误的php rsa签名错误。但在窗户上还可以

Question

    $RSA = new \Crypt_RSA();
    $RSA->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);
    $RSA->setSignatureMode(CRYPT_RSA_SIGNATURE_PKCS1);

    $result = $RSA->loadKey($merchantPrivateKey); ///0  391
    $query = array('a'=>12,'b'=>23);
    $sign = base64_encode($RSA->sign(join('', $query)));
    var_dump($sign);

签名方法出现错误，php错误日志允许内存大小为52222