如何上升或下限变量？

Question

I have tried to use some algorithms made for other languages for ceiling variables and flooring them, I looked up in the PHP Manual for answers but couldn't manage to find any answers as to finding the floor / ceiling.

I have tried setting my precision to 0 in the PHP.INI and that didn't change anything.

I have also tried 3 / 2 and I want that to give me 1 (floor) as answer or 2 (ceil)

Answer 1

To ceiling or floor a variable it is as simple as using the PHP builtin math functions:

$ceiling = ceil(1.5);   // Ceiling of 3/2 is 2

$floor   = floor(1.5);  // Floor of 3/2 is 1

ceil takes a float and returns a float rounded up to the nearest integer. floor takes a float and returns a float rounded down to the nearest integer. See:

http://php.net/manual/en/function.ceil.php

http://php.net/manual/en/function.floor.php