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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>
<?php
/** Include path **/
set_include_path(get_include_path() . PATH_SEPARATOR . '../../../Classes/');
/** \PhpOffice\PhpSpreadsheet\IOFactory */
include 'PHPExcel/IOFactory.php';
$inputFileType = 'CSV';
$inputFileName = './sampleData/example2.csv';
/** Define a Read Filter class implementing \PhpOffice\PhpSpreadsheet\Reader\IReadFilter */
class chunkReadFilter implements \PhpOffice\PhpSpreadsheet\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 **/
$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader($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 **/
$reader->setReadFilter($chunkFilter)
->setContiguous(true);
/* Instantiate a new PHPExcel object manually **/
$spreadsheet = 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 **/
$reader->setSheetIndex($sheet);
/* Load only the rows that match our filter into a new worksheet in the PHPExcel Object **/
$reader->loadIntoExisting($inputFileName, $spreadsheet);
/* Set the worksheet title (to reference the "sheet" of data that we've loaded) **/
/* and increment the sheet index as well **/
$spreadsheet->getActiveSheet()->setTitle('Country Data #' . (++$sheet));
}
echo '<hr />';
echo $spreadsheet->getSheetCount(),' worksheet',(($spreadsheet->getSheetCount() == 1) ? '' : 's'),' loaded<br /><br />';
$loadedSheetNames = $spreadsheet->getSheetNames();
foreach ($loadedSheetNames as $sheetIndex => $loadedSheetName) {
echo '<b>Worksheet #',$sheetIndex,' -> ',$loadedSheetName,'</b><br />';
$spreadsheet->setActiveSheetIndexByName($loadedSheetName);
$sheetData = $spreadsheet->getActiveSheet()->toArray(null, false, false, true);
var_dump($sheetData);
echo '<br />';
}
?>
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