parse two variables to another

[nesurfer87]

basic question: if I have the following two variables, how can I make the variable $url = "http://www.example.com/directory"

$baseURL = "http://www.example.com";
$directory = "/directory"

thanks!

[PappaJohn]

$baseURL = "http://www.example.com";
$directory = "/directory"

$fullurl = $baseURL . $directory;

[nesurfer87]

much appreciated !