Expired timestamp, yours 1518536117, ours 1529457881
<hr />
OAuthRequest Object
(
    [parameters:protected] => Array
        (
            [bar] => baz
            [method] => foo%20bar
            [oauth_consumer_key] => key
            [oauth_nonce] => 1b2ed3b93e2b885e781f3450150947e0
            [oauth_signature] => 9J/uLGaKRGY8bNp67he09RrZq1g=
            [oauth_signature_method] => HMAC-SHA1
            [oauth_timestamp] => 1518536117
            [oauth_token] => accesskey
            [oauth_version] => 1.0
        )

    [http_method:protected] => GET
    [http_url:protected] => http://oauthbin.com:/v1/echo?bar=baz&method=foo%2520bar&oauth_consumer_key=key&oauth_nonce=1b2ed3b93e2b885e781f3450150947e0&oauth_signature=9J%2FuLGaKRGY8bNp67he09RrZq1g%3D&oauth_signature_method=HMAC-SHA1&oauth_timestamp=1518536117&oauth_token=accesskey&oauth_version=1.0
    [base_string] => 
)