(PHP 4, PHP 5, PHP 7) Find highest value mixed

(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) Base-10 logarithm float

(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) Show largest possible random value

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

(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