Need Help With URL

I have this code so far

	<td>Referral:(optional)</td>
<td><input id='referral' type='text' name='6' value='{$_SERVER['REQUEST_URI']}' class='input'></td>
	

PHP:

And I want the value to show the Referral Username.
Right now i get this in the textbox which is normal

/register.php/USERNAME.html

how would i get the value of the textbox to show just the USERNAME and ignore /register.php/ and .html

 

$var = $_SERVER['REQUEST_URI'];
	$var = explode("/", $var);
	$var = explode(".html", $var[2]);
	echo $var[0];

PHP:

But wouldn't it be easier to use GET? register.php?ref=USERNAME

 

but how would i use the GET?
sorry im not strong with php

 

h*tp://www.w3schools.com/PHP/php_get.asp
register.php?ref=USERNAME, you can call ref anything you want, and the variable would be $_GET['ref'] or anything you want to use.

 

thanks for the help i fixed it