Php coding help for beginner!?

I've a made a small file upload script using php. After a user has completed his upload he will recieve a direct link to that image like this http://somewebsite.com/images/user/abc.jpg.
But, I want the link to be shown in input box so that user can easily copy the link with one click. How do I make it.

I repeat,
I have $abcd = "http://somewebsite.com/link-to-image.jpg"
I want to display it in a input box, so that he/she will be able to copy the code with single click.
Thanks everyone in advance.
PS: Sorry, Bad English.