<?php namespace PhpOffice\PhpSpreadsheet\Worksheet; use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException; abstract class CellIterator implements \Iterator { /** * Worksheet to iterate. * * @var Worksheet */ protected $worksheet; /** * Iterate only existing cells. * * @var bool */ protected $onlyExistingCells = false; /** * Destructor. */ public function __destruct() { unset($this->worksheet); } /** * Get loop only existing cells. * * @return bool */ public function getIterateOnlyExistingCells() { return $this->onlyExistingCells; } /** * Validate start/end values for "IterateOnlyExistingCells" mode, and adjust if necessary. * * @throws PhpSpreadsheetException */ abstract protected function adjustForExistingOnlyRange(); /** * Set the iterator to loop only existing cells. * * @param bool $value * * @throws PhpSpreadsheetException */ public function setIterateOnlyExistingCells($value) { $this->onlyExistingCells = (bool) $value; $this->adjustForExistingOnlyRange(); } }