asinh.php

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<?php
 
namespace Complex;
 
if (!function_exists(__NAMESPACE__ . '\\asinh')) {
    function asinh($complex): Complex
    {
        $complex = Complex::validateComplexArgument($complex);
 
        if ($complex->isReal() && ($complex->getReal() > 1)) {
            return new Complex(\asinh($complex->getReal()));
        }
 
        $asinh = clone $complex;
        $asinh = $asinh->reverse()
            ->invertReal();
        $asinh = asin($asinh);
        return $asinh->reverse()
            ->invertImaginary();
    }
}