(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, PHP 5, PHP 7) Natural logarithm float

(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

(PHP 4, PHP 5, PHP 7) Generate a random integer