Are there analogues of the to_char function in PostgreSQL?

Question

PHP

Is there an analogue of the following function in php?
TO_CHAR(1, '0000') // here the result will be 0001

Answer 1

lpad?
It's not very clear what exactly the function does.
In any case, you can write your own implementation.

Answer 2

sprintf
echo sprintf("%'.04d", 1);