I'm looking for a low overhead way to convert a .xlsx file to a .csv file using PHP without consuming excess memory or loading extraneous classes. Anyone?
You can read XLSX files with PHP using PhpSpreadsheet. From there, you only need to figure out the destination format.
You can use following code in PhpSpreadsheet.
$reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('CSV');
$objPHPExcel = $reader->load('csv_file.csv');
$objWriter = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($objPHPExcel, 'XLSX');
$objWriter->save('excel_file.xlsx');
If you need to lower memory usage you can provide some caching to the processing, see - https://phpspreadsheet.readthedocs.io/en/latest/topics/memory_saving/
Related
I have to parse with php an XLS file that is written by some other code and it seems to be poorly written.
I've tried parsing it with PHPExcel using autorecognition in this way:
$inputFileType = PHPExcel_IOFactory::identify($inputFileName);
echo 'filetype: '.$inputFileType.'<br>';
$objReader = PHPExcel_IOFactory::createReader($inputFileType);
$objPHPExcel = $objReader->load($inputFileName);
Which returns:
filetype: CSV
The file is opened but it is not read correctly as the data it's not correctly recognized, content is not in proper cells and some cells give error. I've tried using all other PHPExcel filetypes and all of them return error.
I've tried to open it with a text editor (Notepad++) and the file it's in binary, not a simple CSV. The extension is XLS but since it's written via a script cannot be used as unique identifier of the version.
If i open the file with Excel it's opened and i can saved it in another format (for example as a new xlsx file) and after that i can correctly read it.
Thinking it's encoded in some very old format, I've tried with other library SimpleExcel and i got this error:
File extension XLS doesn't match with xml
Is there a way to "correct" the format before parsing it?
I am trying to read excel file in my CodeIgniter application. The function getActiveSheet()->toArray(null,true,true,true); is working fine for an excel file with 14442 x 17 cells, however this function does not works for an excel file with 17590 x 17 cells. In this second case, browser ends-up with a blank page and I am not getting any error. So please tell what can be the issue?
Code:
$objPHPExcel = PHPExcel_IOFactory::load($file_path);
$allDataInSheet = $objPHPExcel->getActiveSheet()->toArray(null,true,true,true);
Probably out of memory. It is a common issue with large excel files.
If you only need to read the data you can use something like
$objReader = PHPExcel_IOFactory::createReaderForFile($file);
$objReader->setReadDataOnly(true);
Is it possible and if is how can i change excel file extension while uploading or before saving file on server? I am using php and mysql.
Thankyou
You can do something like this.
move_uploaded_file($_FILES['file']['tmp_name'], upload_PATH.'/'.$_FILES['file']['name'].'x');
But that will only change the file name with the xlsx extension. It will not actually convert the file to xlsx format.
As previously mentioned in a different reply, changing the extension won't actually change the format, and it's not a good idea to serve a .xls file as .xlsx, since this will only confuse anyone trying to read it.
What you could do (disregarding potential problems with converting and verification of the file) is read the uploaded file into a library like PHPExcel (http://phpexcel.codeplex.com) and then use the builtin functions to export it as an .xlsx file. Sample below:
// Create a reader to read .xls format
$reader = PHPExcel_IOFactory::createReader('Excel5');
// Read the .xls file from upload storage
$workbook = $reader->load($_FILES['file']['tmp_name']);
// Create a writer to output in .xlsx format
$writer = PHPExcel_IOFactory::createWriter($workbook, 'Excel2007');
// Save file to destination .xlsx path
$writer->save($destination_path);
Keep in mind that although this might work perfectly well, the conversion might mess with the contents of the file. This might not be desirable, as the conversion can cause data loss, formatting changes and all sorts of weirdness.
I am trying to open an existing excel file, modify some cells and save it. I am using Excel2007 for reader and writer.
The input file is about 1 MB large and it has few formulas, protected data and hidden rows and columns and worksheets which I do not modify.
I am able to load the data and read and write some values into it, which I check with various var_dumps in the code.
The problem is while saving it. It throws some fatal errors on timing outs and also if it writes the file the file size is bloated to 9.2 MB, which is okay if I can open it.
code snippet - nothing fancy.
$objReader = PHPExcel_IOFactory::createReader('Excel2007');
$objPHPExcel = $objReader->load($inputFile);
$objPHPExcel->setActiveSheetIndex(2);
$activeSheet = $objPHPExcel->getActiveSheet();
$currCell = $activeSheet->getCell("O3");
$cellValidation = $currCell->getDataValidation("O3");
$values = array();
if ($cellValidation->getShowDropDown() == true)
{
$values = $cellValidation->getFormula1();
$valArray = explode(",", $values);
$currCell->setValue($valArray[0]);
}
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter -> setPreCalculateFormulas(false);
$objWriter->save($outputFile);
I use MS Excel 2010 to open the resultant file but it just takes forever and has not opened it even once.
Please help me to troubleshoot this by giving me pointers as to where I should be looking.
Any help is greatly appreciated.
Instead of saving it to a file, save it to php://outputDocs:
$objWriter->save('php://output');
This will send it AS-IS to the browser.
You want to add some headersDocs first, like it's common with file downloads, so the browser knows which type that file is and how it should be named (the filename):
// We'll be outputting an excel file
header('Content-type: application/vnd.ms-excel');
// It will be called file.xls
header('Content-Disposition: attachment; filename="file.xls"');
// Write file to the browser
$objWriter->save('php://output');
First do the headers, then the save. For the excel headers see as well the following question: Setting mime type for excel document.
So the final code would have below lines -
// Save Excel 2007 file
#echo date('H:i:s') . " Write to Excel2007 format\n";
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
ob_end_clean();
// We'll be outputting an excel file
header('Content-type: application/vnd.ms-excel');
// It will be called file.xls
header('Content-Disposition: attachment; filename="file.xlsx"');
$objWriter->save('php://output');
I think this line:
ob_end_clean();
Should solve your problem.
Thanks!
There's a whole lot of reasons for that "bloat" and it very much depends on the actual data in the worksheet, but MS Excel itself uses a lot of different techniques to keep the filesize small, whereas PHPExcel writes a simple version of the OfficeOpenXML format.
For example, MS Excel looks at the string content of all cells, and stores the individual strings in a string table. If a string is used by two or more cells, there will only be a single entry in the string table. However, there's a performance overhead in checking if a string already exists in the string table, so PHPExcel doesn't perform that check but will duplicate entries in the string table. This means that it will create a large file because of the duplication, but keeps the save speed as fast as possible.
Similarly, MS Excel looks at all formulae, and if the formula is similar to an existing formula (with only a row/column offset difference) it will store it as a shared formula rather than a cell formula, so the actual formula data is only stored once. Again, PHPExcel won't perform this check, because it is a big performance overhead in the save, so it stores every formula as a cell formula rather than a shared formula.
And no, I can't explain why the file doesn't load in MS Excel 2010, nor will I be able to explain it without being able to run the whole thing through debug
I know this isn't the right place to ask about this specific vague problem, but maybe someone knows this library well enough to enlighten me. Here is the thing:
I am writting an Excel5 over an existing Excel file with PHPExcel. I need to upload that Excel to the Zoom website, so it can provide me with a list of tracking numbers. However, for some reason the library they are using to read the uploaded Excel files cannot read the rows written by PHPExcel and the only solution I've found so far is to manually copy the contents of my dynamically generated Excel to another document using MS Excel 2007.
In other words, the Zoom website can read the rows written natively by Excel but not rows written by PHPExcel. My file has only one single sheet, and I can open it no problem with Excel 2007.
Even if I manually add some rows to the template and then add more rows with PHPExcel, Zoom will read the rows written manually by me, but not the rows written by PHPExcel.
This is how I'm doing it:
// Starting with the PHPExcel library
$this->load->library('PHPExcel');
$this->load->library('PHPExcel/IOFactory');
$template_file = 'zoom_tracking_template.xls';
$i = 3;
$objReader = IOFactory::createReader('Excel5');
$objPHPExcel = $objReader->load($template_file);
$objPHPExcel->setActiveSheetIndex(0);
// Fetching ML payments
foreach($payments as $row)
{
$objPHPExcel->getActiveSheet()->setCellValue('A'.$i, 'VANESSA NEISZER');
$objPHPExcel->getActiveSheet()->setCellValue('B'.$i, '02127616116');
$objPHPExcel->getActiveSheet()->setCellValue('C'.$i, '1ER PISO MINITIENDAS 199 BLVD SABANA GRANDE, CRUCE C / CALLE NEGRIN');
$objPHPExcel->getActiveSheet()->setCellValue('D'.$i, $row->mailing_city);
$objPHPExcel->getActiveSheet()->setCellValue('E'.$i, $row->mailing_name);
$objPHPExcel->getActiveSheet()->setCellValue('F'.$i, $row->mailing_name);
$objPHPExcel->getActiveSheet()->setCellValue('G'.$i, $row->mailing_personal_id);
$objPHPExcel->getActiveSheet()->setCellValue('H'.$i, $row->mailing_phone);
$objPHPExcel->getActiveSheet()->setCellValue('I'.$i, $row->mailing_address1.' '.$row->mailing_address2);
$objPHPExcel->getActiveSheet()->setCellValue('J'.$i, $row->nickname);
$objPHPExcel->getActiveSheet()->setCellValue('K'.$i, '1');
$objPHPExcel->getActiveSheet()->setCellValue('L'.$i, '0.3');
$objPHPExcel->getActiveSheet()->setCellValue('M'.$i, 'M');
$objPHPExcel->getActiveSheet()->setCellValue('N'.$i, 'PRODUCTO');
$objPHPExcel->getActiveSheet()->setCellValue('O'.$i, '0');
$i++;
}
$objPHPExcel->setActiveSheetIndex(0);
$objWriter = IOFactory::createWriter($objPHPExcel, 'Excel5');
// Sending headers to force the user to download the file
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="Envios'.date('dMy').'.xls"');
header('Cache-Control: max-age=0');
$objWriter->save('php://output');
I have no clue of what PHP library they are using to read Excel files and I am certain they wont tell me if I ask them. I know they use PHP, and their library only read Excel 2003 files, however, I don't know why they can't read my files but they can read other files written manually on MS Excel.
Any clues, ideas or suggestions I could try would be greatly appreciated.
And PHPExcel's main developer is looking at this issue (among others), somewhere in between trying to find a new day job and having a life. I'm not familiar with the zoom website, or the software that they use. PHPExcel BIFF8 files can be read by Excel, OOCalc and Gnumeric without error... but a couple of questions spring to mind.
What version of PHPExcel?
Does any of the data contain UTF-8 characters?
Are there any formulae in the template worksheet?
If so, what are they?