Changing a variable function to a global function

Hey guys,

I have read the codex guides and i am still a little confused on changing my variable function to have global output

[code title=””]function getPricebs($url) {
$decode = file_get_contents($url);
return json_decode($decode, true);
}

$btcbsUSD = getPricebs(‘https://www.bitstamp.net/api/ticker/’);
$btcbsPrice = $btcbsUSD[“last”];
$btcbsVol = $btcbsUSD[“volume”]; // added line for volume here
$btcbsDisplay = round($btcbsPrice, 2);
$btcbsVol = round($btcbsVol, 2);[/code]

This code is grabbing rates from a table. I’d like the outputs $btcbsDisplay and $btcbsVol to be global so I can access them from any page with a quick reference to the variable…. It seems reletively easy, as the guide suggest to define the variables outside the function but i am not exactly sure which ones i need to define for my case.

Thank you!