(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) Natural logarithm float

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

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

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

(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) Hexadecimal to decimal

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