Help getting data from URL

[paulpage]

I'm looking for a way to take data from a URL, and then insert it into a HTML form.

For example, the URL is http://www.domain.com/help.php?username

The file help.php contains a HTML form, and I want take the username and set it as the default value for an input tag.

[Wien]

html part of help.php :

<input type="text" size="20" maxlength="40" value="<? echo $username ?>" name="FieldName"> 

but you must receive something like :
http://www.domain.com/help.php?username=harry

[paulpage]

Thanks, just what I was looking for.