PHPOffice / PhpSpreadsheet

     */

    private static function resizeMatricesExtend(&$matrix1, &$matrix2, $matrix1Rows, $matrix1Columns, $matrix2Rows, $matrix2Columns)

    {

        if (($matrix2Columns < $matrix1Columns) || ($matrix2Rows < $matrix1Rows)) {

            if ($matrix2Columns < $matrix1Columns) {

                for ($i = 0; $i < $matrix2Rows; ++$i) {

                    $x = $matrix2[$i][$matrix2Columns-1];

                    for ($j = $matrix2Columns; $j < $matrix1Columns; ++$j) {

                        $matrix2[$i][$j] = $x;

                    }

                }

            }

            if ($matrix2Rows < $matrix1Rows) {

                $x = $matrix2[$matrix2Rows-1];

                for ($i = 0; $i < $matrix1Rows; ++$i) {

                    $matrix2[$i] = $x;

                }

            }

        }

        if (($matrix1Columns < $matrix2Columns) || ($matrix1Rows < $matrix2Rows)) {

            if ($matrix1Columns < $matrix2Columns) {

            }

        }

        if (($matrix1Columns < $matrix2Columns) || ($matrix1Rows < $matrix2Rows)) {

            if ($matrix1Columns < $matrix2Columns) {

                for ($i = 0; $i < $matrix1Rows; ++$i) {

                    $x = $matrix1[$i][$matrix1Columns-1];

                    for ($j = $matrix1Columns; $j < $matrix2Columns; ++$j) {

                        $matrix1[$i][$j] = $x;

                    }

                }

            }

            if ($matrix1Rows < $matrix2Rows) {

                $x = $matrix1[$matrix1Rows-1];

                for ($i = 0; $i < $matrix2Rows; ++$i) {

                    $matrix1[$i] = $x;

                }

            }

        }

    }