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New examples, including reading a larger workbook in chunks to give improved memory usage

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git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@62489 2327b42d-5241-43d6-9e2a-de5ac946f064
This commit is contained in:
Mark Baker
2010-10-20 11:30:09 +00:00
parent 45109e0533
commit 5af4355b78
6 changed files with 246 additions and 65 deletions
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Documentation/Examples/Reader/exampleReader11.php
+50 -19
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@@ -16,7 +16,7 @@ date_default_timezone_set('Europe/London');
<body>
<h1>PHPExcel Reader Example #11</h1>
<h2>Simple File Reader for Multiple CSV Files</h2>
<h2>Reading a Workbook in "Chunks" Using a Configurable Read Filter (Version 1)</h2>
<?php
/** Include path **/
@@ -26,32 +26,63 @@ set_include_path(get_include_path() . PATH_SEPARATOR . '../../../Classes/');
include 'PHPExcel/IOFactory.php';
$inputFileType = 'CSV';
$inputFileNames = array('./sampleData/example1.csv','./sampleData/example2.csv');
$inputFileType = 'Excel5';
// $inputFileType = 'Excel2007';
// $inputFileType = 'Excel2003XML';
// $inputFileType = 'OOCalc';
// $inputFileType = 'Gnumeric';
$inputFileName = './sampleData/example2.xls';
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
$inputFileName = array_shift($inputFileNames);
echo 'Loading file ',pathinfo($inputFileName,PATHINFO_BASENAME),' into WorkSheet #1 using IOFactory with a defined reader type of ',$inputFileType,'<br />';
$objPHPExcel = $objReader->load($inputFileName);
$objPHPExcel->getActiveSheet()->setTitle(pathinfo($inputFileName,PATHINFO_BASENAME));
foreach($inputFileNames as $sheet => $inputFileName) {
echo 'Loading file ',pathinfo($inputFileName,PATHINFO_BASENAME),' into WorkSheet #',($sheet+2),' using IOFactory with a defined reader type of ',$inputFileType,'<br />';
$objReader->setSheetIndex($sheet+1);
$objReader->loadIntoExisting($inputFileName,$objPHPExcel);
$objPHPExcel->getActiveSheet()->setTitle(pathinfo($inputFileName,PATHINFO_BASENAME));
/** 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 />';
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);
/** 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 />';
echo '<br /><br />';
}