使用PHP在服务器上读取文件

I am working on PHP. I want to read a file from a server. For example. My file is on 192.168.0.1:/myfolder/myfile.txt. And i wan to display all the files content on PHP page, The problem is how to open the file on the server. i am using

$file = fopen("192.168.0.1:/myfolder/myfile.txt","r") or exit("Unable to open the file!");

But this is not working. I get error.

PHP warning: Unable to open the file.

I also allowed couple of option in php.ini. But nothing works.