Newbie: Safe function call to a .inc file outside the web folder

[Graham Anderson <grahama@xxxxxxxx>]

I am relatively new to security....
Is the below reasonable safe ?

I have all of my main functions outside the web folder
I am including this function with every php script that accesses 
fonovisa.inc


function getBrain()
{
	$temp = explode('.', $_SERVER['SERVER_NAME']);  // returns 
'www.myserver.com'
	$size = count($temp);
	$server = $temp[$size -2]; // returns 'myserver'
	$brainPath = "/home/".$server."/includes/fonovisa.inc";

	require_once($brainPath);
}


is this ok ?
Any help is appreciated :)
g

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