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<?php

error_reporting(E_ALL);
set_time_limit(0);

date_default_timezone_set('Europe/London');

?>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

<title>PHPExcel Reader Example #11</title>

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<h1>PHPExcel Reader Example #11</h1>
<h2>Reading a Workbook in "Chunks" Using a Configurable Read Filter (Version 1)</h2>
<?php

/** Include path **/
set_include_path(get_include_path() . PATH_SEPARATOR . '../../../Classes/');

/** PHPExcel_IOFactory */
include 'PHPExcel/IOFactory.php';


$inputFileType = 'Excel5';
//	$inputFileType = 'Excel2007';
//	$inputFileType = 'Excel2003XML';
//	$inputFileType = 'OOCalc';
//	$inputFileType = 'Gnumeric';
$inputFileName = './sampleData/example2.xls';


/**  Define a Read Filter class implementing PHPExcel_Reader_IReadFilter  */
class chunkReadFilter implements PHPExcel_Reader_IReadFilter
{
	private $_startRow = 0;

	private $_endRow = 0;

	/**  We expect a list of the rows that we want to read to be passed into the constructor  */
	public function __construct($startRow, $chunkSize) {
		$this->_startRow	= $startRow;
		$this->_endRow		= $startRow + $chunkSize;
	}

	public function readCell($column, $row, $worksheetName = '') {
		//  Only read the heading row, and the rows that were configured in the constructor
		if (($row == 1) || ($row >= $this->_startRow && $row < $this->_endRow)) {
			return true;
		}
		return false;
	}
}


echo 'Loading file ',pathinfo($inputFileName,PATHINFO_BASENAME),' using IOFactory with a defined reader type of ',$inputFileType,'<br />';
/**  Create a new Reader of the type defined in $inputFileType  **/
$objReader = PHPExcel_IOFactory::createReader($inputFileType);


echo '<hr />';


/**  Define how many rows we want for each "chunk"  **/
$chunkSize = 20;

/**  Loop to read our worksheet in "chunk size" blocks  **/
for ($startRow = 2; $startRow <= 240; $startRow += $chunkSize) {
	echo 'Loading WorkSheet using configurable filter for headings row 1 and for rows ',$startRow,' to ',($startRow+$chunkSize-1),'<br />';
	/**  Create a new Instance of our Read Filter, passing in the limits on which rows we want to read  **/
	$chunkFilter = new chunkReadFilter($startRow,$chunkSize);
	/**  Tell the Reader that we want to use the new Read Filter that we've just Instantiated  **/
	$objReader->setReadFilter($chunkFilter);
	/**  Load only the rows that match our filter from $inputFileName to a PHPExcel Object  **/
	$objPHPExcel = $objReader->load($inputFileName);

	//	Do some processing here

	$sheetData = $objPHPExcel->getActiveSheet()->toArray(null,true,true,true);
	var_dump($sheetData);
	echo '<br /><br />';
}


?>
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