How to insert a class variable into a string without dots?

Question

PHP

There is a class

class Names {
public static $egor = "Egor Ignatich";
}

There is a line
$mail = "Welcome to php, Mr ...";
How to substitute instead of three points Names::$egor?
I tried just to insert it through {}, but it doesn't work.
Dots are also not an option, there may be an insert in the center and not one.
Or how can it be done better?

Answer 1

$mail = "Welcome to php, Mr %s";
echo sprintf($mail, Names::$egor);