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  • Bug fixes for general core bugs in 3.11.x will end 14 Nov 2022 (12 months plus 6 months extension).
  • Bug fixes for security issues in 3.11.x will end 13 Nov 2023 (18 months plus 12 months extension).
  • PHP version: minimum PHP 7.3.0 Note: minimum PHP version has increased since Moodle 3.10. PHP 7.4.x is supported too.
<?php

/**
 *
 * Function code for the complex multiplication operation
 *
 * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
 * @license    https://opensource.org/licenses/MIT    MIT
 */
namespace Complex;

/**
 * Multiplies two or more complex numbers
 *
 * @param     array of string|integer|float|Complex    $complexValues   The numbers to multiply
 * @return    Complex
 */
< function multiply(...$complexValues)
> 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; }