Get file content from URL

Question

When I use this URL: https://chart.googleapis.com/chart?cht=p3&chs=250x100&chd=t:60,40&chl=Hello|World&chof=json I am prompted to download this text file with JSON content.  I want to create a PHP page. that when I call this PHP page, it should call the above URL and get content(JSON format) from the file and show it on screen.

How can I do this?