(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) Round fractions down mixed

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

(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, PHP 5, PHP 7) Hexadecimal to decimal

(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) Generate a random integer