Is there any tool for calculating bandwidth? I have a web page in PHP which is generating json every 10 seconds. I have a web server for PHP and they have given me 2GB (2000 MB) of bandwidth, so I want to know how much memory my page is consuming in 1 hit.
For example, if I have the URL and I hit that URL, is there a tool that will show me how much bandwidth I have used?
Feature you need is called profiling. There are some free profilers, and there are also paid.
From paid, you can consider using Blackfire. From free, you can try XHProf.