Split large Excel/Csv file to multiple files on PHP or Javascript

Question

I have excel(file.xls)/csv(file.csv) file that contains/will contain hundreds of thousands of entry, even millions I guess. Is it possible to split this one to multiple file

Answer 1

Yes it is possible to do that in PHP and with CSV files. You basically iterate over the large file and chunk each X rows, forwarding those rows to another file.

You find the information how to open the large CSV file as an iterator in this answer here:

• Answer to "how to extract data from csv file in php"

Then you need to chunk the iterator each X rows parts. That can be done as outline here:

• Answer to "Need some advice with PHP loop"

Just instead of outputting into multiple

...

HTML lists, you copy over into a new files. That basically works like outlined in:

• Answer to "How can I split a CSV file in PHP?"

However this time you want to use the SplFileObject::fputcsv method. Take care you use the latest stable PHP for this, otherwise you need do different, see fputcsv().

If the first line of the original file contains column-headers, you might be as well interested in the following:

• Answer to "Process CSV Into Array With Column Headings For Key"

It just shows some ways to extend / process the incomming file. You might not need the full abstraction done there, just keeping the first line around might do it already.