How to round a decimal number to nearest 5 or nearest 10 in php

Question

How to round a decimal number to nearest 5 or nearest 10 in php

Answer 1

$new = round($num / 10, 0) * 10 rounds to nearest 10

Answer 2

For the special case of nearest 10, you can use a negative precision:

$new = round($num, -1)

Answer 3

Multiply by 2, round to the nearest 10 (see pascal's answer), then divide by 2. Avoid dividing/multiplying by 5 to do this since float representation will interfere with the accuracy of your results.