(PHP 4, PHP 5, PHP 7) Base-10 logarithm float

(PHP 4, PHP 5, PHP 7) Absolute value number abs

(PHP 4, PHP 5, PHP 7) Binary to decimal number

(PHP 4, PHP 5, PHP 7) Square root float sqrt

(PHP 4, PHP 5, PHP 7) Decimal to binary string

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Finds whether a value is not a number

(PHP 4, PHP 5, PHP 7) Rounds a float float round

(PHP 4, PHP 5, PHP 7) Exponential expression

(PHP 4, PHP 5, PHP 7) Arc tangent float atan

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Returns exp(number) - 1, computed in a way that is accurate even when the