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

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

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

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

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

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

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