How can this code be simplified?

Question

PHP

$bc=1;
$kf=2;
$gr=3;
$a=Array($bc,$kf,$gr);
$b="A$a[0]B$a[1]C$a[2]D";

Are there ways to not write $a[0],$a[1],$a[2] but put some kind of label in the text, well, let's say
"A%B%C%D"
php will put the elements in the appropriate places array?

Answer 1

$b = sprintf('A%dB%dC%dD', $bc, $kf, $gr);