Question

%01.2f

I know “.2” is the precision, but what does the 1st part mean – %01 ?

I tried changing it to 05, 2 etc and the resulted string looks the same..

Answer 1

That is how much spacing is there. It’s back from printf in C. Looking up printf would give you more information. However, it’s simple enough to explain here.

I am guessing that the reason it doesn’t do anything is because HTML doesn’t allow more than 1 consecutive space and so it doesn’t show up but if you ran your PHP in a command line (it’s possible) then you would see the spacing appear.

For instance in C (php is basically a C language for the web) you could say

printf("%20s %20s!", "Hello", "World");

And that would print out something like this

               Hello                World!

in normal html it should show as this (not in a ‘code block’) : Hello World!

^^ That is spaced the same in the code btw.