mall/librarys/phpexcel/PHPExcel/WorksheetIterator.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.
 */
class PHPExcel_WorksheetIterator implements Iterator
{
    /**
     * Spreadsheet to iterate
     *
     * @var PHPExcel
     */
    private $subject;

    /**
     * Current iterator position
     *
     * @var int
     */
    private $position = 0;

    /**
     * Create a new worksheet iterator
     *
     * @param PHPExcel         $subject
     */
    public function __construct(PHPExcel $subject = null)
    {
        // Set subject
        $this->subject = $subject;
    }

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

    /**
     * Rewind iterator
     */
    public function rewind()
    {
        $this->position = 0;
    }

    /**
     * Current PHPExcel_Worksheet
     *
     * @return PHPExcel_Worksheet
     */
    public function current()
    {
        return $this->subject->getSheet($this->position);
    }

    /**
     * Current key
     *
     * @return int
     */
    public function key()
    {
        return $this->position;
    }

    /**
     * Next value
     */
    public function next()
    {
        ++$this->position;
    }

    /**
     * More PHPExcel_Worksheet instances available?
     *
     * @return boolean
     */
    public function valid()
    {
        return $this->position < $this->subject->getSheetCount();
    }
}