php curl\u exec将响应返回为1

我试图使用curl,如下代码片段所示。我已经尝试了所有可以搜索类似问题的选项。已经添加了所有可用的setopt选项,但仍然得到1的响应。我正在尝试向服务器发送请求,并期待json响应。我错过了什么?

 $logger->info('url:'.$service_url);
    $curl = curl_init();
    $curl_post_data = array(
        'username' => 'user1',
        'password' => 'welcome'
    );
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_POSTFIELDS,$curl_post_data);
    curl_setopt($curl, CURLOPT_URL, $service_url);
    curl_setopt($curl, CURLOPT_HTTPGET, true);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl,CURLOPT_POST, 1);  
    curl_setopt($curl,CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($curl,CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($curl,CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl,CURLOPT_CONNECTTIMEOUT ,3);
    curl_setopt($curl,CURLOPT_TIMEOUT, 20);
    curl_setopt($curl, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Accept: application/json'
    ));

    $curl_response = curl_exec($curl);

    if ($curl_response === false) {
        $info = curl_getinfo($curl);
        curl_close($curl);
        die('error occured during curl exec. Additioanl info: ' . var_export($info));


    }
    curl_close($curl);
    $logger->info('curl_response 11:'.print_r($curl_response));
    $decoded = json_decode($curl_response,JSON_PRETTY_PRINT);
    if (isset($decoded->response->status) && $decoded->response->status == 'ERROR') {
        die('error occured: ' . $decoded->response->errormessage);

    }
    $logger->info('response ok!');
    $logger->info('decoded:'.print_r($decoded));

正如所建议的那样,只使用print\u r($curl\u response,true)记录响应,并使用print\u r($decoded['orderId')获取特定值。