PHP curl POST请求

function curlQytl($url,$data,$type = 'form',$token=null){

    if($type=='form'){
        $headers = array(
            'Content-Type: application/x-www-form-urlencoded'
        );
    }else{
        $headers = array(
            'Content-Type: application/json',
            'Authorization: ' . $token['token_type'].' '.$token['access_token']// 第三方验证
        );
    }
    if(is_array($data)){
        $data = json_encode($data);
    }
    $curl = curl_init();
    //请求地址
    curl_setopt($curl, CURLOPT_URL, $url);
    //头部验证
    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    //头部验证
    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    //是否返回结果
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    //请求超时设置（单位秒，0不做限制）
//    curl_setopt($curl, CURLOPT_TIMEOUT, 0);
    curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10000);
    //https请求，（false为https）
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    //请求方式POST
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'POST');
    //参数设置
    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    //执行
    $response = curl_exec($curl);
    //关闭
    curl_close($curl);
    //返回
    return $response;
}

第一种type='form'参数 $data = 'username=[mrwang]&password=[123456]'; 不用括号