exponent cannot have a fractional part

Description

The exponent argument, aka the second, must be an integer value. It might be negative, or even zero, but it cannot be with a decimal separator.

PHP tries to round it, so float values with only zeros after the decimal separator may work.

Example

<?php

echo bcpow('4.2', '3.2', 2); // 74.08

?>

Alternatives

• Check the argument with is_int().
• Round the argument to an integer.