(PHP 4, PHP 5, PHP 7) Natural logarithm float

(PHP 4, PHP 5, PHP 7) Round fractions down mixed

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Returns the floating point remainder (modulo) of the division of the arguments

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Inverse hyperbolic sine

(PHP 4, PHP 5, PHP 7) Seed the random number generator

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

(PHP 4, PHP 5, PHP 7) Arc tangent of two variables

(PHP 4, PHP 5, PHP 7) Hexadecimal to decimal

(PHP 4, PHP 5, PHP 7) Convert a number between arbitrary bases

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Finds whether a value is a legal finite number