PhpRiot
Become Zend Certified

Prepare for the ZCE exam using our quizzes (web or iPad/iPhone). More info...


When you're ready get 7.5% off your exam voucher using voucher CJQNOV23 at the Zend Store

atanh

(PHP 4 >= 4.1.0, PHP 5)

atanhInverse hyperbolic tangent

Description

float atanh ( float $arg )

Returns the inverse hyperbolic tangent of arg, i.e. the value whose hyperbolic tangent is arg.

Parameters

arg

The argument to process

Return Values

Inverse hyperbolic tangent of arg

Changelog

Version Description
5.3.0 This function is now available on all platforms

See Also

PHP Manual