mall/librarys/phpexcel/PHPExcel/Worksheet/CellIterator.php

<?php
/**
 * 重庆赤晓店信息科技有限公司
 * https://www.chixiaodian.com
 * Copyright (c) 2023 赤店商城 All rights reserved.
 */
abstract class PHPExcel_Worksheet_CellIterator
{
    /**
     * PHPExcel_Worksheet to iterate
     *
     * @var PHPExcel_Worksheet
     */
    protected $subject;

    /**
     * Current iterator position
     *
     * @var mixed
     */
    protected $position = null;

    /**
     * Iterate only existing cells
     *
     * @var boolean
     */
    protected $onlyExistingCells = false;

    /**
     * Destructor
     */
    public function __destruct()
    {
        unset($this->subject);
    }

    /**
     * Get loop only existing cells
     *
     * @return boolean
     */
    public function getIterateOnlyExistingCells()
    {
        return $this->onlyExistingCells;
    }

    /**
     * Validate start/end values for "IterateOnlyExistingCells" mode, and adjust if necessary
     *
     * @throws PHPExcel_Exception
     */
    abstract protected function adjustForExistingOnlyRange();

    /**
     * Set the iterator to loop only existing cells
     *
     * @param    boolean        $value
     * @throws PHPExcel_Exception
     */
    public function setIterateOnlyExistingCells($value = true)
    {
        $this->onlyExistingCells = (boolean) $value;

        $this->adjustForExistingOnlyRange();
    }
}