/usr/share/php/PHP/Compat/Function/tanh.php is in php-compat 1.6.0a3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* Replace tanh()
*
* @category PHP
* @package PHP_Compat
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
* @link http://php.net/function.tanh
* @author Arpad Ray <arpad@php.net>
* @version $Revision: 269597 $
* @since PHP 5
* @require PHP 3.0.0
*/
function php_compat_tanh($n)
{
return (exp(2 * $n) - 1) / (exp(2 * $n) + 1);
}
if (!function_exists('tanh')) {
function tanh($n)
{
return php_compat_tanh($n);
}
}
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