Sprintf duplicate value

Question

Here's a quick question

I need to duplicate values in a sprintf function

sprintf("%s %s %s",$arg1,$arg1,$arg2);

How can I only pass $arg1 once? Can't seem to find the answer on php.net
Thanks
Andrew

Answer 1

Use the indexed format %1$s instead:

sprintf("%1$s %1$s %2$s", $arg1, $arg2)