How transform a string into a variable name – PHP?

I have a php file ("gion.php") with inside an array:

 $gion = array('ok');

I want to include this file and print the array.

 $name_user = "gion";
 include "profili/".$name_user.".php";
 $file_profile= "$".$name_user;

 print_r($file_profile);

print_r doesn’t work because i suspect $file_profile is a string, so i can change it in a name variable ?

"$gion" (string) -> $gion (variable) 

thanks a lot

EDIT: i want to print array(‘ok’) and not "gion"

>Solution :

File: gion.php:

$gion = array('ok');

File: main.php (or whatever your filename is):

$name_user = "gion";
include "profili/" . $name_user . ".php";
$file_profile = ${$name_user};

print_r($file_profile);   // this also works: print_r($gion);

This will print:

Array
(
    [0] => ok
)