<?php
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Reader\IReadFilter;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
error_reporting(E_ALL);
set_time_limit(0);
date_default_timezone_set('Europe/London');
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>PhpSpreadsheet Reader Example #14</title>
</head>
<body>
<h1>PhpSpreadsheet Reader Example #14</h1>
<h2>Reading a Large CSV file in "Chunks" to split across multiple Worksheets</h2>
<?php
require_once __DIR__ . '/../../../src/Bootstrap.php';
$inputFileType = 'Csv';
$inputFileName = './sampleData/example2.csv';
/** Define a Read Filter class implementing IReadFilter */
class chunkReadFilter implements IReadFilter
{
private $_startRow = 0;
private $_endRow = 0;
/**
* Set the list of rows that we want to read.
*
* @param mixed $startRow
* @param mixed $chunkSize
*/
public function setRows($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 * */
$reader = IOFactory::createReader($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 PhpSpreadsheet object manually * */
$spreadsheet = new Spreadsheet();
/* 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 PhpSpreadsheet 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 />';
}
?>
<body>
</html>