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

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

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

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

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

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

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

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

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

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