multiply.php

Go to the documentation of this file.

<?php
 
namespace Complex;
 
if (!function_exists(__NAMESPACE__ . '\\multiply')) {
    function multiply(...$complexValues): Complex
    {
        if (count($complexValues) < 2) {
            throw new \Exception('This function requires at least 2 arguments');
        }
 
        $base = array_shift($complexValues);
        $result = clone Complex::validateComplexArgument($base);
 
        foreach ($complexValues as $complex) {
            $complex = Complex::validateComplexArgument($complex);
 
            if ($result->isComplex() && $complex->isComplex() &&
                $result->getSuffix() !== $complex->getSuffix()) {
                throw new Exception('Suffix Mismatch');
            }
 
            $real = ($result->getReal() * $complex->getReal()) -
                ($result->getImaginary() * $complex->getImaginary());
            $imaginary = ($result->getReal() * $complex->getImaginary()) +
                ($result->getImaginary() * $complex->getReal());
 
            $result = new Complex(
                $real,
                $imaginary,
                ($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix())
            );
        }
 
        return $result;
    }
}