使用php curl函数处理弹出登录窗口（netgear路由器）

Question

I've figured out how to use the php curl functions to automatically log into 2 different radios but am having trouble with netgear routers.

The problem is that its login screen consists of a popup window where you enter user/pass and I can't figure out how to process it with the php curl functions.
I tried adding
curl_setopt($ch, CURLOPT_USERPWD, "username:password");
as suggested in an answer to this question post, but it just returned an "invalid login" screen (before, it would just hang at this point so I suppose it is an improvement).

I also tried adding both
curl_setopt($curl_conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
and
curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
before it and turning CURLOPT_FOLLOWLOCATION on and off but same result.

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $LoginPage);//IP Address followed by :8080
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($curl_conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, $Username . ":" . $Password);
$data = curl_exec($ch);

Update(2018/2/5):
The following gave me part of the settings page for the router! I'll probably have to mess with the html/javascript to get the rest...

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);//10 seconds
    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);//kept trying options till it worked
    curl_setopt($ch, CURLOPT_USERPWD, "$Username:$Password");        
    $result = curl_exec($ch);        
    //$resultStatus = curl_getinfo($ch); 
    //print 'ResultStatus:'.print_r($resultStatus) . "<br>"; 
    curl_close($ch);  
    echo($result);

Answer 1

Borrowing from this answer, a header needs to be set. Instead of:

curl_setopt($curl_conn, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERPWD, $Username . ":" . $Password);

use these options:

$headers = array(
    'Content-Type:application/json',
    'Authorization: Basic '. base64_encode("$Username:$Password")
);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

And the option to verify peer's SSL certificate might also need to be set to false:

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);