Gimana cara mengatur path location menggunakan curl?

Hi sobat koding, Saya ingin mencoba menyimpan image ke sebuah folder pada localhost project menggunakan fungsi curl.. tapi masih bermasalah dengan penulisan path-nya.

Berikut warning yang muncul di browser:

Warning: fopen(localhost/webcam-master/webcamImage/gambar.jpg): failed to open stream: No such file or directory in C:\xampp\htdocs\webcam-master\home_ipcamera.php on line 18 X_x

Thanks :)

Source Code

<?php
require_once( dirname( __FILE__ ) . '/connectionClass.php' );

//Camera
$url ="http://192.168.1.11/cgi-bin/viewer/gambar.jpg";

//$image_link = "http://images5.fanpop.com/image/photos/31100000/random-random-31108109-500-502.jpg";//Direct link to image
$split_image = pathinfo($url);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL , $url);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.A.B.C Safari/525.13");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response= curl_exec ($ch);
curl_close($ch);
$file_name = "localhost/webcam-master/webcamImage/".$split_image['filename'].".".$split_image['extension'];
$file = fopen($file_name , 'w') or die("X_x");
fwrite($file, $response);
fclose($file);
?>