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<title>PHPExcel Reader Example #15</title>



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<h1>PHPExcel Reader Example #14</h1>

<h2>Reading a Large CSV file in "Chunks" to split across multiple Worksheets</h2>

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/** Include path **/

set_include_path(get_include_path() . PATH_SEPARATOR . '../../../Classes/');



/** PHPExcel_IOFactory */

include 'PHPExcel/IOFactory.php';





$inputFileType = 'CSV';

$inputFileName = './sampleData/example2.csv';



/**  Define a Read Filter class implementing PHPExcel_Reader_IReadFilter  */

class chunkReadFilter implements PHPExcel_Reader_IReadFilter

{

	private $_startRow = 0;



	private $_endRow = 0;



	/**  Set the list of rows that we want to read  */

	public function setRows($startRow, $chunkSize) {

		$this->_startRow	= $startRow;

		$this->_endRow		= $startRow + $chunkSize;

	}



	public function readCell($column, $row, $worksheetName = '') {

		//  Only read the heading row, and the rows that are configured in $this->_startRow and $this->_endRow

		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 to read for each "chunk"  **/

$chunkSize = 100;

/**  Create a new Instance of our Read Filter  **/

$chunkFilter = new chunkReadFilter();



/**  Tell the Reader that we want to use the Read Filter that we've Instantiated  **/

/**    and that we want to store it in contiguous rows/columns  **/

$objReader->setReadFilter($chunkFilter)

		  ->setContiguous(true);





/**  Instantiate a new PHPExcel object manually  **/

$objPHPExcel = new PHPExcel();



/**  Set a sheet index  **/

$sheet = 0;

/**  Loop to read our worksheet in "chunk size" blocks  **/

/**  $startRow is set to 2 initially because we always read the headings in row #1  **/

for ($startRow = 2; $startRow <= 240; $startRow += $chunkSize) {

	echo 'Loading WorkSheet #',($sheet+1),' using configurable filter for headings row 1 and for rows ',$startRow,' to ',($startRow+$chunkSize-1),'<br />';

	/**  Tell the Read Filter, the limits on which rows we want to read this iteration  **/

	$chunkFilter->setRows($startRow,$chunkSize);



    /**  Increment the worksheet index pointer for the Reader  **/

    $objReader->setSheetIndex($sheet);

	/**  Load only the rows that match our filter into a new worksheet in the PHPExcel Object  **/

    $objReader->loadIntoExisting($inputFileName,$objPHPExcel);

    /**  Set the worksheet title (to reference the "sheet" of data that we've loaded)  **/

    /**    and increment the sheet index as well  **/

    $objPHPExcel->getActiveSheet()->setTitle('Country Data #'.(++$sheet));

}





echo '<hr />';



echo $objPHPExcel->getSheetCount(),' worksheet',(($objPHPExcel->getSheetCount() == 1) ? '' : 's'),' loaded<br /><br />';

$loadedSheetNames = $objPHPExcel->getSheetNames();

foreach($loadedSheetNames as $sheetIndex => $loadedSheetName) {

	echo '<b>Worksheet #',$sheetIndex,' -> ',$loadedSheetName,'</b><br />';

	$objPHPExcel->setActiveSheetIndexByName($loadedSheetName);

	$sheetData = $objPHPExcel->getActiveSheet()->toArray(null,false,false,true);

	var_dump($sheetData);

	echo '<br />';

}



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