Rounding numbers can be done a number of ways. You can round a float up or down to the nearest integer or you could round to a specific precision. Even then you can choose whether or not to round halves up or down and even round towards even and odd values. Let’s take a look at the PHP code to pull this off:

Round up to the nearest integer

ceil(12.30); // 13

Round down to the nearest integer

floor(6.66); // 6

Round to 2 decimal places

round(3.1415926535, 2); // 3.14

Round half up

round(7.5, 0, PHP_ROUND_HALF_UP); // 8

Round half down

round(7.5, 0, PHP_ROUND_HALF_DOWN); // 7

Round half even

round(5.5, 0, PHP_ROUND_HALF_EVEN); // 6

Round half odd

round(5.5, 0, PHP_ROUND_HALF_ODD); // 5

As always, there’s many ways to skin this cat with PHP.