怎么走出号码 - php [关闭]

Question

I want to find out how I can extract $number out of the following code:

$calc = ($number % 10000) / 100;

So what's the opposite of %?

Answer 1

Generally you can't. % gives you the modulo of a division, there are mathematically an infinity of numbers that have the same modulo for a given ratio.

It is simply not bijective..