(PHP 4, PHP 5, PHP 7) Show largest possible random value

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

(PECL trader >= 0.2.0) Vector Trigonometric Tan

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Subtract numbers

(PECL stats >= 1.0.0) Not documented float

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Hamming distance

(PHP 4 >= 4.0.4, PHP 5, PHP 7) Divide numbers

(PECL stats >= 1.0.0) Not documented float

(PHP 5, PHP 7 >= 5.3.0) Tests if a bit is set

(PHP 7) Integer division int intdiv ( int $dividend