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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

namespace Matrix\Operators;

use Matrix\Matrix;
use \Matrix\Builder;
use Matrix\Exception;

class Multiplication extends Operator
{
    /**
     * Execute the multiplication
     *
     * @param mixed $value The matrix or numeric value to multiply the current base value by
     * @throws Exception If the provided argument is not appropriate for the operation
     * @return $this The operation object, allowing multiple multiplications to be chained
     **/
< public function execute($value)
> public function execute($value): Operator
{ if (is_array($value)) { $value = new Matrix($value); } if (is_object($value) && ($value instanceof Matrix)) { return $this->multiplyMatrix($value); } elseif (is_numeric($value)) { return $this->multiplyScalar($value); } throw new Exception('Invalid argument for multiplication'); } /** * Execute the multiplication for a scalar * * @param mixed $value The numeric value to multiply with the current base value * @return $this The operation object, allowing multiple mutiplications to be chained **/
< protected function multiplyScalar($value)
> protected function multiplyScalar($value): Operator
{ for ($row = 0; $row < $this->rows; ++$row) { for ($column = 0; $column < $this->columns; ++$column) { $this->matrix[$row][$column] *= $value; } } return $this; } /** * Execute the multiplication for a matrix * * @param Matrix $value The numeric value to multiply with the current base value * @return $this The operation object, allowing multiple mutiplications to be chained * @throws Exception If the provided argument is not appropriate for the operation **/
< protected function multiplyMatrix(Matrix $value)
> protected function multiplyMatrix(Matrix $value): Operator
{ $this->validateReflectingDimensions($value); $newRows = $this->rows; $newColumns = $value->columns; $matrix = Builder::createFilledMatrix(0, $newRows, $newColumns) ->toArray(); for ($row = 0; $row < $newRows; ++$row) { for ($column = 0; $column < $newColumns; ++$column) { $columnData = $value->getColumns($column + 1)->toArray(); foreach ($this->matrix[$row] as $key => $valueData) { $matrix[$row][$column] += $valueData * $columnData[$key][0]; } } } $this->matrix = $matrix; return $this; } }