guzzle: cURL error 35: Unknown SSL protocol error

Hi guys,

I have problems connecting with Guzzle through a proxy to any SSL site. If I try it with standard cURL in PHP it works fine, however, with Guzzle the connection fails and returns:

[GuzzleHttp\Exception\ConnectException]
cURL error 35: Unknown SSL protocol error in connection to api.ipify.org:443

The cURL code that works well:

    $options = array(
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_PROXY => '1.2.3.4:1234',
        CURLOPT_PROXYUSERPWD => "proxy:auth",
    );

    $ch      = curl_init( 'https://api.ipify.org?format=json' );
    curl_setopt_array( $ch, $options );
    $content = curl_exec( $ch );
    $err     = curl_errno( $ch );
    $errmsg  = curl_error( $ch );
    $header  = curl_getinfo( $ch );
    curl_close( $ch );

    $header['errno']   = $err;
    $header['errmsg']  = $errmsg;
    $header['content'] = $content;

    print_r($header);

The Guzzle code that fails:

    // http client
    $this->client = $client = new Client([
        'cookies' => true
    ]);

    $res = $this->client->request('GET', 'https://api.ipify.org?format=json', [
        'proxy' => 'https://proxy:auth@1.2.3.4:1234',
        'verify' => false,
        'curl' => [
            //CURLOPT_SSLVERSION => 3
            //CURLOPT_SSLVERSION => CURL_SSLVERSION_DEFAULT,
            CURLOPT_SSL_VERIFYPEER => false
        ],
    ]);

print_r($res);

Any ideas? I’m guessing it has something to do how Guzzle handles HTTP SSL requests, since it is also using cURL underlying, I am confused why this wouldn’t work.

Thanks