Description:
------------
---
From manual page: http://www.php.net/function.intval
---

Why not to add pass-by-reference option?

That would be such a beautiful thing:

intval(&$var);
strval(&$var);

and so on...

Test script:
---------------
$var = "123";

intval(&$var);

var_dump($var); //int(123)

Expected result:
----------------
int(123)