no (see your other thread for an explanation why). and I recommend to never use require/include to import global variables. I have spent hours searching where such an included global variable originates.
however you can use require/include to define variables.
// define the variable
$skeleton = 'some value';
// note the return statement here!
// import the data
// again, note the return statement
return require 'skeleton.php';
// define the variable in the current script
$skeletonName = release();
echo "This is it!: " . $skeletonName; // This is it!: some value